Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:

I. They are prokaryotes.

II. The cell wall of cyanobacteria has peptidoglycan.

III. They can fix atomspheric nitrogen

The correct explanations would be:

(1) I and II only

(2) I and III only

(3) II and III only

(4) I, II and III

Which of the following are valid pointers to the demerits of the two kingdom classification proposed by Linnaeus?

I. Euglena has features both of plants and animals.

II. Chlamydomanas is autotrophic but has flagella.

III. Slime molds resemble animals in one phase of their life cycle and plants in the other phase.

(1) I and II only

(2) I and III only

(3) II and III only

(4) I, II and III

Identify the group that is not matched correctly to all the characters shown:

Math Column I with Column II and choose your answer from the codes given:

Identify the incorrect statement regarding bacteria:

(1) Bacteria are the most abundant microorganisms.

(2) Bacteria live in extreme habitats where very few other life forms can survive.

(3) Bacteria as a group show the most extensive metabolic diversity.

(4) They are obligate intracellular parasites.

Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:

I. The cell wall does not contain peptidoglycan.

II. DNA associated with histones.

III. Translation initiated with formylated methionine.

IV. RNA polymerase similar to eukaryotic RNA polymerase II

V. ATPase similarity

VI. Similar DNA replication and repair

How many of the above characters Archaebacteria share with eukaryotes?

(1) 3

(2) 4

(3) 5

(4) 6

Identify a character that is not unique to archaebacteria:

(1) Cell wall structure

(2) Cell membrane structure

(3) Flagellin protein structure

(4) Fatty acid synthetase present

Identify the incorrect statement regarding true bacteria?

(1) As a group, they exhibit maximum metabolic diversity

(2) Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.

(3) Heterotrophic bacteria are the most abundant in nature.

(4) Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.

Consider the following statements regarding Mycoplasma:

I. They are a genus of bacteria that have a unique cell wall of their own.

II. In their genetic code UGA codes for tryptophan.

III. None of them is pathogenic to humans.

IV. They have a large genome.

V. They can be killed by penicillins.

VI. They can survive without oxygen

The number of correct statements is:

(1) 1

(2) 2

(3) 3

(4) 4

Diatoms have left behind large amounts of cell wall deposits in their habitat because:

(1) They are most abundant in that habitat

(2) Their life span is long 

(3) Their wall is indestructible

(4) The statement is not true