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Three-dimensional molecules with cross-links are formed in case of a :
1. Thermoplastic
2. Thermosetting plastics
3. Both 1 and 2
4. None of these

Which is a natural polymer?
1. Protein
2. PVC
3. PMMA
4. SBR

Plexiglass is a commercial name of
1. Glyptal
2. Polyacrylonitrile
3. Polymethyl methacrylate
4. Polymethyl acrylate

Polymer that contains ester linkage is: 
1. Nylon-66
2. PVC
3. Terylene
4. SER

Glucose has difference from fructose in that if:
1. Does not undergo hydrolysis
2. Gives a silver mirror with Tollen's reagent
3. Monosaccharide
4. None of these

A certain compound gives negative tests with ninhydrin and positive test with Benedict's solution. The compound is:
1. A protein
2. A monosaccharide
3. A lipid
4. An amino acid

Cellulose is a straight-chain polysaccharide composed of only :
1. D-glucose units joined by $\mathrm{\alpha }$ - glycosidic linkage.
2. D-glucose units joined by $\mathrm{\beta }$ - glycosidic linkage.
3. D-galactose units joined by $\mathrm{\alpha }$ - glycosidic linkage.
4. D-galactose units joined by $\mathrm{\beta }$ - glycosidic linkage.

Which one of the following is not a reducing sugar?
1. Glucose
2. Fructose
3. Lactose
4. Sucrose

Glucose contains in addition to the aldehyde group
1. One secondary-OH and four primary-OH
2. One primary-OH and four secondary-OH
3. Two primary-OH and three secondary-OH
4. Three primary-OH and two secondary-OH

$\mathrm{\alpha }$-D (+) glucose and $\mathrm{\beta }$-D (+) glucose are :
1. Diastereomers
2. Epimers
3. Anomers
4. Enantiomers

An insoluble biomolecule in water is-

The biomolecule that contain non-transitional metal ion is: 
1. Vitamin ${\mathrm{B}}_{12}$
2. Chlorophyll
3. Haemoglobin
4. Insulin

The cell membranes are mainly composed of:
1. Fats
2. Proteins
3. Phospholipids
4. Carbohydrates

During the process of digestion, the proteins present in food materials are hydrolyzed to amino acids. The two
enzymes involved in the process are respectively:
$\mathrm{Protein} \stackrel{\mathrm{Enzyme} \mathrm{A}}{\to } \mathrm{Polypetide} \stackrel{\mathrm{Enzyme} \mathrm{B}}{\to } \mathrm{Amino} \mathrm{acid}$
1. Amylase and maltase
2. Diastase and lipase
3. Pepsin and trypsin
4. Invertase and zymase

The human body does not produce : 

Peptide hormone among the following options is:
1. Glucagon
2. Testosterone
3. Thyroxin
4. Adrenaline

A nano peptide contains _______ peptide linkage
1.  10
2.  8
3.  9
4.  18

Proteins are :
1. Polypeptides with low molecular weights
2. Polypeptides with high molecular weights
3. Polymers of amines
4. Polymers of sec amines

Among the following L - Series is:
1.  $\mathrm{COOH}$
$|$
${\mathrm{H}}_2\mathrm{N} - \mathrm{C} - {\mathrm{CH}}_2\mathrm{OH}$
$|$
$\mathrm{H}$
2.  $$\begin{gathered} \mathrm{COOH} \\ | \\ {\mathrm{CH}}_2\mathrm{OH} —\mathrm{C}— \mathrm{H} \\ | \\ {\mathrm{NH}}_2 \end{gathered}$$
3.  $$\begin{gathered} {\mathrm{NH}}_2 \\ | \\ \mathrm{H} —\mathrm{C}—\mathrm{COOH} \\ | \\ {\mathrm{CH}}_2\mathrm{OH} \end{gathered}$$
4.  $$\begin{gathered} {\mathrm{CH}}_2\mathrm{OH} \\ | \\ {\mathrm{NH}}_2 —\mathrm{C}—\mathrm{H} \\ | \\ \mathrm{COOH} \end{gathered}$$

At pH = 5, glycine exists as:
1.  $\stackrel{\oplus }{\mathrm{N}}{\mathrm{H}}_3 - {\mathrm{CH}}_2 - \mathrm{CO}\stackrel{⊝}{\mathrm{O}}$
2.  $\stackrel{\oplus }{\mathrm{N}}{\mathrm{H}}_3 - {\mathrm{CH}}_2 - \mathrm{COOH}$
3.  ${\mathrm{NH}}_2 - {\mathrm{CH}}_2 - \mathrm{COOH}$
4.  ${\mathrm{NH}}_3 - {\mathrm{CH}}_2 - \mathrm{CO}\stackrel{⊝}{\mathrm{O}}$

Insulin regulates the metabolism of : 

On treatment with ninhydrin which of the following gives blue color?
1. Proteins
2. Peptides
3. $\mathrm{\alpha }$-Amino acids
4. All of these

An acids among the followingthat acts as vitamin is:
1. Benzoic acid
2. Ascorbic acid
3. Oxalic acid
4. Formic acid

A linkage present in proteins and peptides is:

1.		2.
3.		4.

An optically inactive amino acid is-

Which of the following does not exists as Zwitter ion?
1. Glycine
2. Glutamic acid
3. Sulphanillic acid
4. P-aminobenzoic acid

Which one of the following is an amine hormone?
(1) Thyroxine
(2) Oxypurin
(3) Insulin
(4) Progesterone

The incorrect statement among the following options is: 
1. Chlorophyll is responsible for the synthesis of carbohydrates in plants.
2. The compound formed by the addition of oxygen to hemoglobin is called oxyhemoglobin.
3. Acetylsalicylic acid is known as aspirin.
4. The metal ion present in vitamin B12 is ${\mathrm{Mg}}^{++}$

The number of disulphide linkage present in insulin is:
1.  3
2.  4
3.  1
4.  2

Waxes are esters of:
1. Glycerol and fatty acid.
2. Long-chain alcohols and long-chain fatty acids.
3. Glycerol.
4. Long-chain alcohol.