Question No:1

Protein is described by biologists at………. levels.

[A] 1
[B] 2
[C] 3
[D] 4



Question No:2

Sequence or positional information of amino acid is given by the

[A] 2° structure
[B] 1° structure
[C] tertiary structure
[D] quaternary structure



Question No:3

In primary structure of protein

[A] Left end represent —> 1st amino acid (C-terminal amino acid)
[B] Right end represent —> Last amino acid (N terminal amino acid)
[C] Left end represent —> 1st amino acid (N-terminal amino acid)
[D] Right end represent —> 1st amino acid (C-terminal amino aci



Question No:4

Which structure is absolutely necessary for the many biological activities of proteins?

[A] 1°
[B] 3°
[C] 2°
[D] 4°



Question No:5

When assembly of more than one poly peptide occur it is known as ………. structure of protein,

[A] 1°
[B] 2°
[C] 3°
[D] 4°



Question No:6

Which of the following is correct about human Haemoglobin (Hb)?

[A] Made up to 2-α and 2-β subunits
[B] Present hi RBC
[C] Use to carry O₂ and CO₂
[D] All



Question No:7

Select incorrect statement from the following:

[A] Most of the enzymes are protein
[B] ‘Hb’ is example of quaternary structure of protein
[C] In primary structure of protein, left hand is N-terminal and right hand is C-terminal
[D] In protein or polypeptide, amino acids are linked by glycosidic bond



Question No:8

Which of the following possess heterocyclic ring?

[A] Adenine
[B] Guanine and Cytosine
[C] Thymine and Uracil
[D] All



Question No:9

Identify the nucleoside from the following:
A. Adenosine
B. Uridylic acid
C. Undine
D. Cytidylic acid

[A] A and B only
[B] A and C only
[C] C and D only
[D] B and C only



Question No:10

Which of the following act as a genetic material?

[A] DNA and RNA
[B] Uridylic acid
[C] Adenylic acid
[D] Gunanylic acid



Question No:11

Sugar + Nitrogen bases form

[A] Nucleoside
[B] Nucleotide
[C] Peptide
[D] Glycoside



Question No:12

Sugar + Nitrogen bases + Phosphate forms

[A] Nucleoside
[B] Nucleotide
[C] Peptide
[D] Glycoside



Question No:13

How many Nitrogen atoms are present in adenine?

[A] 3
[B] 4
[C] 5
[D] 6



Question No:14

DNA and RNA are

[A] polypeptide
[B] polynucleotide
[C] polysaccharide
[D] all



Question No:15

How much percentage of total cellular mass is formed by nucleic acid?

[A] 3
[B] 2
[C] 5-7
[D] 10-15



Question No:16

Following are purines

[A] Adenine
[B] Guanine
[C] Cytosine
[D] Both (a) and (b)



Question No:17

Following are pyramidine (substituted):

[A] Cytosine
[B] Thymine
[C] Uracil
[D] All



Question No:18

DNA contains

[A] ribose
[B] 3′ deoxyribose
[C] 5′ deoxyribose
[D] 2′ deoxyribose



Question No:19

The bond present between two nucleotides is known as

[A] phosphoester linkage
[B] phosphodiester linkage
[C] gycosidic linkage
[D] peptide linkage



Question No:20

Watson-Crick Structure of DNA is

[A] 1° structure
[B] 2° structure
[C] 3° structure
[D] 4° Structure