NEET 2022 Biology (Abroad Paper)

Biology 1 - Section A

1.

Match List -I with List-II

List - I	List - II
a. Cedrus	(i) Pteridophyte
b. Adiantum	(ii) Gymnosperm
c. Sphagnum	(iii) Liverwort
d. Marchantia	(iv) Moss

Choose the correct answer from the options given below:

	a.	b.	c.	d.
1.	(ii)	(iii)	(i)	(iv)
2.	(iii)	(i)	(iv)	(ii)
3.	(ii)	(i)	(iv)	(iii)
4.	(iii)	(iv)	(ii)	(i)

2.

The products of light reaction in photosynthesis are:
1. ATP, NADPH and \(O_2\)
2. ATP, NADPH, \(O_2\) and \(H_2O\)
3. ATP, NADPH , and \(H_2O\)
4. ATP, NADPH , and \(CO_2\)

3.

In prophase I of Meiosis, chromosomes start pairing together and synapsis takes place. This process occurs during which of the following stage?

1.	Pachytene	2.	Diplotene
3.	Leptotene	4.	Zygotene

4.

Which of the following statements above facilitated diffusion is incorrect?
1. Special proteins of the membrane help in this process
2. Porins are involved in this process
3. Movement of molecule the occurs against the concentration gradient
4. ATP is not required for this process

5.

Phloem sap in the plants mainly consists of :

1.	fructose and water	2.	fructose and sucrose
3.	glucose and water	4.	sucrose and water

6.

Which hormone is used to induce immediate stomatal closure in leaves ?

1.	Cytokinin	2.	Gibberellin
3.	Abscisic Acid	4.	Auxin

7.

Identify the correct set of statements with regard to properties of humus
(a) Highly resistant to microbial action
(b) Dark-colored amorphous substance
(c) End product of detritus food chain
(d) Reservoir of nutrients
(e) Undergoes decomposition very fast
Choose the correct answer fro the options given below:

1.	(a), (b) and (d) only	2.	(a),(b) and (e) only
3.	(a) and (b) only	4.	(b) , (c) and (a)

8.

Select the correct statements with respect to pleiotropism
(a) A gene is said to be pleiotropy if it affects more than one trait
(b) Phenylketonuria is an example of pleiotropy
(c) A condition where one gene has several alleles is referred to as pleiotropism
(d) A trait is said to be pleiotropic if several genes control it
Choose the correct answer from the options given below:

1.	(a) and (b) only	2.	(a) and (d) only
3.	(a), (b) and (c) only	4.	(b) ,(c) and (d) only

9.

The living differentiated cells, that lost the capacity to divide anymore, can regain the capacity of division under certain conditions. This phenomenon is termed as

1.	Redifferentiation	2.	Maturation
3.	Differentiation	4.	Dedifferentiation

10.

Identify the correct statements related to the androecium in the flower
a. The sterile stamens are called staminodes
b. When stamens are attached to petals they are called epipetalous
c. Monadelphy is seen in China-rose
d. Polyadelphy is seen in Pea
e. Variation in the length of anther filaments is seen in Mustard
Choose the correct answer from the options given below:

1.	(a), (c), (d) and (e) only	2.	(a) , (b), (c) and (e) only
3.	(a) , (b) and (c) only	4.	(b) , (c) and (d) only

11.

Axillary buds are derived from the activity of :

1.	Lateral meristem	2.	Secondary meristem
3.	Apical meristem	4.	Intercalary meristem

12.

DNA replication is semi-conservative in nature was experimentally proved in eukaryotes by:

1.	Hershey and Chase	2.	Macleod and McCarty
3.	Meselson and Stahl	4.	Talyor and his colleagues

13.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	A father will never pass the gene for haemophilia to his sons.
Reason (R):	Haemophilia is sex-linked (X-linked) recessive traits.

In the light of the above statements, choose the correct answer from the options given below.

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

14.

Which one of the following is not a criterion of genetic material?
1. Should not provide the scope for changes for evolution
2. Should be able to express itself in the form of Mendelian character
3. Should be able to generate its replica
4. Should be stable chemically and structurally

15.

Which one of the following experiments of Frederick Griffith resulted in the discovery of bacterial transformation?
1. S-stain(heat-killed) → injected in to Mice  → Mice lived
2. S-strain (heat killed) + R-strain(live)  →injected in to Mice  → Mice died
3. S-stain  → injected in to Mice  → Mice died
4. R-strain  → injected in to Mice  → Mice lived

16.

High dose of UV-B causes inflammation of cornea and is called as:

1.	UV -blindness	2.	Colour-blindness
3.	Evening- blindness	4.	Snow- blindness

17.

Which of the following come under the "Evil Quarter"?

(a) Habitat loss and fragmentation
(b) Over-exploitation	(c) Alien species invasion
(d) Mortality	(e) Competition

Choose the correct answer from the options given below:

1.	(a), (c) and (d)	2.	(b), (c) and (d)
3.	(a), (b) and (c)	4.	(a), (b) and (d)

18.

Given below are two statements:
Statements-I: Cellulose is a polymeric polysaccharide
Statement-II The building blocks of cellulose are glucose molecules
In the light of the above statements , choose the correct answer from the options given below:
1. Statements-I is correct but statements-II is incorrect
2. Statements-I is incorrect but statements-II is correct
3. Both statements-I and statements-II are correct
4. Both statements-I and Statements -II

19.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	The growth of a multicellular organism is due to mitosis.
Reason (R):	Mitosis is also called as equational division and it offers genetic stability.

In the light of the above statements choose the correct answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct and (R) is not the correct explanation of (A).

20.

The process of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration is referred as:

1.	Association	2.	Emigration
3.	Competition	4.	Immigration

21.

Match List-I with List-II

List-I	List-II
(a) Haemophilia	(i) Inborn error of metabolism which lacks an enzyme that converts phenylalanine into tyrosine
(b) Down's Syndrome	(ii) Sex-linked recessive disorder defect in blood coagulation
(c)Phenylketonuria	(iii) Presence of additional copy of X-chromosome (44+XXY)
(d) Klinefelter's Syndrome	(iv) Additional copy of chromosome number 21

Choose the correct answer from the options given below:

	(a)	(b)	(c)	(d)
1.	(ii)	(iv)	(i)	(iii)
2.	(iv)	(ii)	(i)	(iii)
3.	(ii)	(iii)	(i)	(iv)
4	(i)	(ii)	(iii)	(iv)

22.

Genetically engineered insulin for human is produced from:

1.	Escherichia coli	2.	Psuedomonas putida
3.	Bacillus thuringiensis	4.	Rhizobium meliloti

23.

Removal of apical dominance by decapitation is utilised for:
1. Suppressing the activity of intercalary meristem
2. Early senescence
3. Hedge making
4. Preparing weed-free lawns

24.

Which one of the following process is responsible for the release of \(N_2\) in the atmosphere?
1. Industrial Nitrogen fixation
2. Ammonification
3. Denitrification
4. Biological nitrogen fixation

25.

What will be the ploidy of endosperm of a seed produced after crossing tetraploid female plant with tetraploid male plant?

1.	Pentaploid	2.	Hexaploid
3.	Diploid	4.	Triploid

26.

Which one of the following structures is haploid in its ploidy level?
1. Primary Endospore Nucleus
2. Microspore Mother cell
3. Protonemal cell of a moss
4. Primary endosperm nucleus in dicot

27.

Select the correct statements related to the activity of cork cambium
1. The outer cells differentiate into phelloderm
2. The cork differentiated from cork cambium, is impervious to water due to deposition of tannins and resins
3. Cuts the cells only on the outer side
4. Cuts the cells on inner as well as outer side

28.

Match List-I with List II

List-I	List-II
(a) ETS complex-I	(i) Cyt be1
(b) ETS complex-II	(ii) Cyt a,a3 and 2 copper centres
(c) ETS complex III	(iii) NADH dehydrogenase
(d) ETS complex-IV	(iv) Ubiquinone and FADH dehydrogenase

Choose the correct answer from the options given below:

	(a)	(b)	(c)	(d)
1.	(ii)	(i)	(iv)	(iii)
2.	(iv)	(iii)	(ii)	(i)
3.	(iii)	(ii)	(i)	(iv)
4.	(iii)	(iv)	(i)	(ii)

29.

Species Area relationship is described by the following equation.
log S = log C + Z log A
where Z is:

1.	Area	2.	Species richness
3.	Slope of the line	4.	Y-intercept

30.

Which of the following plants possesses the placentation of ovules borne on central axis with no septa?

1.	Lemon	2.	Pea
3.	China-rose	4.	Primrose

31.

Which of the following physical properties of water is/are responsible for providing water, the high tensile strength and high capillarity during ascent of sap in the plants?
1. Surface tension and cohesion
2. Cohesion, adhesion and surface tension
3. Cohesion only
4. Adhesion and cohesion

32.

Choose the mismatched pair of leaf character with its example:
1. Palmately compound - Alstonia
2. Alternate Phyllotaxy - China-rose
3. Leaf tendril - Pea
4. Opposite phyllotaxy - Calotropis

33.

Which of the following is the correct equation of exponential growth?

1.	\(N_t = N_0 ~e^{rnt}\)	2.	\(N_t = N_0 ~e^{rpt}\)
3.	\(N_t = N_0 ~e^{rst}\)	4.	\(N_t = N_0 ~e^{rt}\)

34.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A):	Restriction enzyme is a type of endonuclease.
Reason (R):	Restriction enzyme cuts the two stands of DNA at specific positions within the DNA.

In the light of the above statements, choose the correct answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

35.

Identify the cytochrome which acts as a mobile carrier for the transfer of electrons between complex III and IV?

1.	Cytochrome a	2.	Cytochrome a₃
3.	Cytochrome b c₁	4.	Cytochrome c

Biology 1 - Section B

36.

Which of the following are not correct regarding decomposition of wastes ?
(a) Low temperature inhibits decomposition
(b) Warm and moist environment favours the process
(c) The process is anaerobic
(d) It is slower if detritus is rich in proteins and carbohydrates
(e) Detritus is degraded into simpler inorganic substance by fungal and bacterial enzymes
Choose the correct answer from the options given below:

1.	(b) and (c) only	2.	(c) (a) and (d) only
3.	(c) and (d) only	4.	(c) (d) and (e) only

37.

The ratio of carbon dioxide fixation between C₄ plants and C₃ plants is :

1.	2:1	2.	2: 3
3.	1:1	4.	1:2

38.

Which of the following bond is formed as a result of reaction of carboxyl group of one amino acid with amino group of other amino acid with elimination of water?

1.	Phosphodiester Bond	2.	Hydrogen Bond
3.	Glycosidic Bond	4.	Peptide Bond

39.

Following crops have been extensively cultivated in CO₂rich atmosphere for higher yield:

1.	Sugar beet and Cabbage	2.	Carrots and Tomatoes
3.	Wheat and Sugar beet	4.	Tomatoes and Bell pepper

40.

Which of the following was proved by girdling experiment?
1. Apoplastic movement of water occurs through intercellular spaces
2. Symplastic movement of water occurs through interconnected protoplast
3. Xylem is responsible for uptake of water
4. Phloem is responsible for translocation of food

41.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	In rDNA technology, non-recombinants transformed bacteria grow on the medium containing ampicillin as well as the medium containing tetracycline.
Reason (R):	Recombinant plasmids contain the foreign gene of interest.

In the light of the above statements, choose the correct answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

42.

Identify the fungi which do not belong to the group of other fungi among the following

1.	Sac-fungi	2.	Puffballs
3.	Mushrooms	4.	Bracket Fungi

43.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and the formation of X-shaped structures called chiasmata.
Reason (R):	In oocytes of some vertebrates, diplotene can last for months or years.

In the light of the above statements, choose the correct answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

44.

The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of :

1.	Dalton units	2.	Svedberg units
3.	Monomeric units	4.	Dobson units

45.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	Semiconservative replication was experimentally proved by Mathew Meselson and Franklin Stahl (1958).
Reason (R):	Meselson and Stahl used radioactive isotope \(^{15}N\) and equilibrium density gradient centrifugation technique.

In the light of the above statements, choose the correct answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

46.

Which of the following is not a character of collenchyma tissue?
1. They provide mechanical support to the growing part of the plant
2. They occur in layers below epidermis in dicotyledonous plants
3. They consist of cells with thick corners due to cellulose deposition
4. They are usually dead and without protoplasts

47.

Which of the following pair of micronutrients would help in the light phase of photosynthesis to help in the reaction leading to oxygen evolution?
1. Zinc and Chlorine
2. Manganese and Molybdenum
3. Molybdenum and Iron
4. Manganese and Chlorine

48.

The construction of the first recombinant DNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native plasmid of which of the following organism?
1. Escherichia coli
2. Bacillus thuringiensis
3. Salmonella typhimurium
4. Agrobacterium tumefaciens

49.

Assuming that the fur colour of an animal is dark, the range of colour shades vary between dark and white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F₁ generation?

1.	All intermediate colour	2.	Range of colour shade
3.	All dark colour	4.	All white colour

50.

Which of the following set represents the correct labelling of A,B, C and D with respect to the given diagram?

1. A- Seed Coat, B- Cotyledon, C- Endosperm, D - Hypocotyle
2. A -Seed Coat, B- Scutellum, C- Endocarp, D - Mesocarp
3. A- Seed Coat, B- Scutellum, C- Microphyle, D - Endocarp
4. A-Pericarp, B - Coleoptile

Biology 2 - Section A

51.

Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls ?

1.	Hypocapnia	2.	Bronchitis
3.	Asthma	4.	Emphysema

52.

Which of the following is correct statement ?
1. Actin and regulatory proteins are located in thin filament.
2. Z-lines anchor myosin (thick) filament to the ends of the sarcomere.
3. Sarcoplasmic reticulum stores acetylcholine.
4. Myosin cross bridges contain calcium binding sites.

53.

The hormone releasing IUDs among the following are :
(a) Multiload 375 (b) LNG - 20
(c) Progestasert (d) Lippe's loop
(e) Vaults
Choose the most appropriate answer from the options given below :

1.	(a) and (d) only	2.	(c) and (e) only
3.	(a) and (b) only	4.	(b) and (c) only

54.

The term 'Blue Revolution' is related with :
1. Various crop plants and their by products
2. Development of water reservoirs
3. Honey and its by-products
4. Fishery industry

55.

Which of the following is/are vegetative propagule(s)?
(a) Eyes of Potato
(b) Zoospore of Chlamydomonas
(c) Rhizome of Ginger
(d) Buds in Hydra
(e) Bulbil of Agave
Choose the most appropriate answer form the options given below :

1.	(e) only	2.	(a), (c), (e) only
3.	(a), (b), (c), (d) only	4.	(b), (d) only

56.

In Drosophila, the genes for color of body and color of eyes are situated on _______.

1.	both the sex chromosomes	2.	autosomes
3.	Y-chromosome	4.	X-chromosome

57.

Given below are two statements :
Statement - I : Membrane-bound organelles of the endomembrane system coordinate cellular functions.
Statement - II : Mitochondria and chloroplasts are not considered a part of the endomembrane system.
In the light of the above statements, choose the most appropriate answer from the options given below
1. Statement - I is correct but Statement - II is incorrect
2. Statement - I is incorrect but Statement - II is correct
3. Both Statement - I and Statement - II are correct
4. Both Statement - I and Statement - II are incorrect

58.

With respect to nucleosome, Which of the following statements is incorrect ?
1. Nucleosome contains 120 bp of DNA helix
2. Nucleosomes are seen as 'beads' on string' under Electron Microscope
3. DNA is wrapped around positively charged histone octamer to form nucleosome.
4. Nucleosome it the repeating unit of chromatin

59.

In a reaction catalyzed by an enzyme, which of the following statements is correct ?
1. Enzymes decrease the activation energy for formation of transition state.
2. Enzymes make transition form substrate to product more difficult.
3. Enzymes increase the activation energy for formation of transition state.
4. Enzyme-substrate complex formed during a reaction lasts for a very long time.

60.

Which one of the following hormones reduces the blood pressure?

1.	Antidiuretic hormone	2.	Atrial Natriuretic factor
3.	Aldosterone	4.	Angiotensin-II

61.

Endemism refers to:

1.	Species richness	2.	Species evenness
3.	Species confined to that region	4.	Species diversity

62.

In a cell, the separation of DNA strands is brought about by the enzyme DNA helicase, whereas in PCR, the separation of DNA strands is due to :

1.	High temperature	2.	Two sets of Primers
3.	Taq DNA polymerase	4.	Deoxynucleotides

63.

A low frequency recombination indicates that the genes are:
1. Located far apart from each other
2. Located close to each other
3. Not linked
4. Present on different chromosomes

64.

How many Y-chromosomes are present in the 2nd polar body in human beings?

1.	01	2.	00
3.	23	4.	02

65.

A population with finite resources shows a logistic growth curve where the correct sequence of events will be:
1. Stationary phase → Acceleration phase  → Lag phase  → Asymptote
2. Acceleration phase  → Deceleration  → Asymptote
3. Acceleration phase  → Leg phase  → Stationary phase
4. Lag phase  → Acceleration phase  → Deceleration  → Asymptote

66.

Air bladder is found in :

1.	Osteichthyes	2.	Aves
3.	Cyclostomata	4.	Chondrichthyes

67.

Which of the following hormones are secreted in women only during pregnancy?

(a) Relaxin	(b) Oxytocin	(c) hCG
(d) hPL	(e) Progesterone

Choose the most appropriate answer from the options given below:

1.	(c) , (d) and (e) only	2.	(b) and (e) only
3.	(b) , (c) and (d) only	4.	(a) , (c) and (d) only

68.

In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to:

1.	\(HCO^-_3\)	2.	\(CO_2\)
3.	\(O_2\)	4.	\(N_2\)

69.

Herbarium, Botanical gardens, Museum, Zoological parks and Key are considered as:

1.	Trophic aids	2.	Environmental aids
3.	Pollution aids	4.	Taxonomical aids

70.

The oocytes of some vertebrates get arrested for years or months in:

1.	Telophase - I	2.	Diplotene
3.	Diakinesis	4.	Metaphase - I

71.

Which of the following types of epithelium lines the walls of blood vessels ?

1.	Ciliated epithelium	2.	Squamous epithelium
3.	Cuboidal epithelium	4.	Columnar epithelium

72.

Select the correct sequence of events occurring during Prophase-I of Meiosis-I
(a) Nuclear envelope breakdown
(b) Synaptonemal complex formation
(c) Compaction of chromosomes
(d) Terminalisation of chiasmata
(e) Crossing over
Choose the most appropriate answer from the options given below:
1. (c) → (b)  → (e)  → (d)  → (a)
2. (c) → (a)  → (b)  → (d)  → (e)
3. (b) → (c)  → (a)  → (d)  → (e)
4. (c) → (a)  → (b)  → (e)  → (d)

73.

One of the strands of double stranded DNA has base composition as follows: 15% A, 15% T, 40%G and 30%C. What will be the percentage of these bases in the complementary strand ?
1. 15% A, 15% T, 30% G , 40% C
2. 15% A, 30% T, 40% G , 15% C
3. 15% A, 15% T, 40% G , 30% C
4. 15% A, 40% T, 15% G , 30% C

74.

Inadequate supply of oxygen to heart muscles leads to a symptom of acute chest pain. This disorder of the circulatory system is identified as:

1.	Angina pectoris	2.	Cardiac arrest
3.	Heart failure	4.	Coronary Heart Disease

75.

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	With the help of several ommatidia, a cockroach can perceive several images of an object, i.e., mosaic vision.
Reason (R):	Mosaic vision gives more sensitivity but less resolution.

In the light of the above statements, choose the most appropriate answer from the options given below:

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

76.

Given below are two statements:
Statements-I: Amphibians and reptiles have a 3-chambered heart with two atria and a single ventricle, and are oviparous in nature
Statements-II: Crocodiles possess a 4 chambered heart with two ventricles and two atria and are viviparous in nature
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement-I is correct but statement-II is incorrect
2. Statement-I is incorrect but statement-II is correct
3. Both statement-I and statement-II are correct
4. Both statement-I and statement-II are incorrect

77.

Which one of the following is not an Assisted Reproductive Technology (ART) used by childless couples to have children?

1.	ZIFT	2.	IUD
3.	IVF	4.	IUT

78.

Immuno-suppressants are administered to burn-patients or during organ transplantation to suppress:

1.	Innate immunity	2.	Cytokine storm
3.	Humoral immunity	4.	Cell-mediated immunity

79.

Ear wax secreting cells have which type of epithelium?
1. Columnar epithelium
2. Exocrine glandular epithelium
3. Compound epithelium
4. Endocrine glandular epithelium

80.

Arrange the following male sex accessory ducts in the correct sequence for the transport of sperms from the tests

(a) Epididymis	(b) Ejaculatory duct
(c) Vasa efferentia
(d) Rete testis	(e) Vas deferens

Choose the most appropriate answer from the options given below:

1.	(d) , (a) , (c) , (e) , (b)	2.	(d) , (c) , (e) , (a) , (b)
3.	(d) , (c) , (a) , (e) , (b)	4.	(d) , (e) , (a) , (c) , (b)

81.

Chylomicrons are:
1. fat coated protein globules
2. micro-sized lipid molecules
3. protein coated fat globules
4. spherical aggregates of fatty acids

82.

Genetic Drift occurs due to :
1. Natural selection
2. Sudden population migration
3. Continuous gene migration
4. Mutation

83.

Bee-keeping helps to improve the yield of following crops Except ____________.

1.	Jowar	2.	Sunflower
3.	Apple	4.	Mustard

84.

Normal sleep-wake cycle in a human body is maintained by the secretion of:

1.	Thyroid gland	2.	Thymus gland
3.	Pineal gland	4.	Pituitary gland

85.

An intestinal hormone that stimulates the pancreas to release a watery secretion that is rich in bicarbonate ions:

1.	Cholecystokinin	2.	Gastric Inhibitory Peptide
3.	Enterokinin	4.	Secretin

Biology 2 - Section B

86.

Which biological process leads to a decrease in the fish-eating bird population near a water body containing toxicants from industrial drainage?
1. Algal bloom
2. Biochemical oxygen demand
3. Accelerated Eutrophication
4. Biomagnification

87.

Select the correct match regarding adaptive radiation of Australian marsupials corresponding to placental mammals
1. Numbat-Flying Squirrel
2. Tasmanian Wolf - Bobcat
3. Marsupial mouse- Mole
4. Spotted Cuscus - Lemur

88.

Terrestrial adaptations necessitated the production of :
1. Highly toxic nitrogenous wastes like urea and uric acid
2. Lesser toxic nitrogenous wastes like urea and uric acid
3. Lesser toxic nitrogenous wastes like ammonia and urea
4. Highly toxic nitrogenous wastes like ammonia and urea

89.

Given below are two statements:
Statement - I: Pyramid of energy is always upright and is the most efficient
Statement-II: Pyramid of biomass in sea is generally inverted
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statements-I is correct but statement-II is incorrect
2. Statements-I is incorrect but statement-II is correct
3. Both statement-I and statements-II are correct
4. Both statement-I and statement-II are incorrect

90.

Identify the properties of a good vector used in rDNA technology
(a) It should have origin of replication supporting a high copy number
(b) It should have preferably more than '2' recognition sites
(c) The restriction sites in vector should be in the antibiotic- resistant genes
(d) It should have suitable marker genes
(e) It should be easy to isolate and purify
Choose the most appropriate answer from the options given below:
1. (a), (c) and (e) only
2. (c), (d) and (e) only
3. (a), (b) and (c) only
4. (a), (c) , (d) and (e) only

91.

Match List - I with List - II

List - I	List - II
(a) Chromoplasts	(i) Proteins
(b) Amyloplasts	(ii) Oil and fats
(c) Elaioplasts	(iii) Starch
(d) Aleuroplasts	(iv) Carotene

Choose the correct answer from the option given below

	(a)	(b)	(c)	(d)
1.	(iv)	(i)	(iii)	(ii)
2.	(iv)	(iii)	(ii)	(i)
3.	(iv)	(ii)	(iii)	(i)
4.	(iv)	(iii)	(i)	(ii)

92.

Match List - I with List - II regarding sensory organs in human.

List - I	List - II
(a) Organ of corti	(i) Photo receptors
(b) Nasal mucosa	(ii) Gustatory receptors
(c) Taste buds	(iii) Auditory receptors
(d) Retina	(iv) Olfactory receptors

Choose the correct answer from the option given below

	(a)	(b)	(c)	(d)
1.	(ii)	(iv)	(iii)	(i)
2.	(iii)	(iv)	(ii)	(i)
3.	(iv)	(iii)	(i)	(ii)
4.	(iii)	(i)	(ii)	(iv)

93.

Which one of the following features are not true for chordates?
(a) Heart is dorsal.
(b) Pharynx is perforated by gill slits.
(c) Central nervous system is ventral, solid and single.
(d) Post-anal tail is present.
(e) Notochord is present.
Choose the most appropriate answer from the option give below :

1.	(e) only	2.	(a), (d) and (c) only
3.	(b) and (c) only	4.	(a) and (c) only

94. If a DNA molecule is shortened by 25 base pairs, how many helical turns will be reduced from its structure?

1.	1	2.	3
3.	2.5	4.	2

95.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	In human beings, insulin is synthesized as a pro-hormone which needs to be processed before it becomes fully mature and functional.
Reason (R):	The extra stretch of C-peptide is to be removed from A-peptide and B-peptide chain of insulin.

In the light of the above statements, Choose the most appropriate answer from the option given below :

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation for (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

96.

Give below are two statements :
Statement I: When an infected female Anopheles mosquito bites, it releases gametocytes of plasmodium into the healthy person.
Statement II: The female Anopheles mosquito takes up sporozoites of Plasmodium with blood meal from an infected person, suffering from malaria.
In the light of the above statements, choose the most appropriate answer from the options give below :
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect

97.

Match List - I with List - II

List - I	List - II
(a) Puccinia	(i) Parasitic fungus on mustard
(b) Neurospora	(ii) Dead substrates
(c) Saprophytes	(iii) Wheat rust
(d) Albugo	(iv) Biochemical and Genetic Work

Choose the correct answer from the option given below :

	(a)	(b)	(c)	(d)
1.	(iii)	(ii)	(iv)	(i)
2.	(iii)	(iv)	(ii)	(i)
3.	(i)	(ii)	(iii)	(iv)
4.	(iv)	(ii)	(i)	(iii)

98.

What would be the proportions of light and hybrid density DNA molecule, respectively if Meselson and Stahl's experiment was continued for 60 minutes ?

1.	50%, 50%	2.	25%, 75%
3.	75%, 25%	4.	100%, 0%

99.

Match List-I with List-II

List-I	List-II
(a) Adhering junctions	(i) Establish a barrier that prevents leakage of extracellular third across a layer of cells
(b) Tight junctions	(ii) Functions like rivets and fasten cells together into strong sheets
(c) Gap junctions	(iii) Pass information through neurotransmitters from one cell to another
(d) Synaptic junctions	(iv) Provide cytoplasmic channels from one cell to an adjacent cell for communication

Choose the correct answer from the options given below

	(a)	(b)	(c)	(d)
1.	(iv)	(iii)	(ii)	(i)
2.	(i)	(iii)	(ii)	(iv)
3.	(ii)	(i)	(iv)	(iii)
4.	(i)	(ii)	(iii)	(iv)

100.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A):	The nematode cannot survive in a transgenic host which expresses specific interfering RNA.
Reason (R):	Nematode-specific gene introduced in the host produces both sense and antisense complementary RNA which initiate RNA interference in the host cell.

In the light of the above statement, choose the most appropriate answer from the option given below :

1.	(A) is correct but (R) is not correct.
2.	(A) is not correct but (R) is correct.
3.	Both (A) and (R) are correct and (R) is the correct explanation of (A).
4.	Both (A) and (R) are correct but (R) is not the correct explanation of (A).

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