Question No:1

A nucleotide is a molecule consisting of a

(A) Hexose sugar, phosphorous and albumen
(B) Posphorus, iron and calcium
(C) Phosphate, 5- carbon sugar and nitrogen base
(D) RNA and glucose

Question No:2

The protein rich alga is

(A) Ulothrix
(B) Spirogyra
(C) Nostoc
(D) Chlorella

Question No:3

What’s the difference between RNA and DNA?

(A) Base
(B) Sugar
(C) Sugar and base
(D) phosphate

Question No:4

DNA replication generally proceeds in a:

(A) 5¹—>3¹ direction
(B) 3¹—>5¹ direction
(C) 3¹—>3¹ direction
(D) 5¹—>5¹ direction

Question No:5

The basic unit of chitin

(A) N – acetyl glucosamine
(B) Glucose
(C) Galactose
(D) Fructose

Question No:6

Which of the following pairs correctly matched?

(A) Central dogma – codon
(B) Okazaki fragments – splicing
(C) RNA polymerase – RNA primer
(D) Restriction enzymes-genetic engineering

Question No:7

A nucleoside is

(A) Base + sugar
(B) Base + phosphate
(C) Sugar + Phosphate
(D) Base+ sugar + Phosphate

Question No:8

DNA Polymerase enzyme is required for synthesis of

(A) DNA from RNA
(B) RNA from DNA
(C) DNA from DNA
(D) RNA from RNA

Question No:9

Which type of DNA is found in bacteria?

(A) Helical DNA
(B) Membrane bound DNA
(C) Straight DNA
(D) Circular free DNA

Question No:10

Which typical stage is known for DNA replication?

(A) Metaphase
(B) G₁-Phase
(C) S-phase
(D) G₂-Phase

Question No:11

Radio-tracer technique shows that DNA is in

(A) Single-helix stage
(B) Double-helix stage
(C) Multi-helix stage
(D) None of the above

Question No:12

The genetic material in transduction is

(A) DNA
(B) RNA
(C) Either DNA or RNA
(D) Both DNA and RNA

Question No:13

A plasmid is made up of

(A) t-RNA
(B) m-RNA
(C) r-RNA
(D) DNA

Question No:14

In a ds DNA molecule the % of cytosine is What is the % of adenine?

(A) 36%
(B) 18%
(C) 32%
(D) 64%

Question No:15

Change in the sequence of nucleotide in DNA is called as

(A) Mutagen
(B) Mutation
(C) Recombination
(D) Translation

Question No:16

The succesive nucelotides of RNA are covalently linked through

(A) Hydrogen bonds
(B) Phosphodiester bonds
(C) Glycosidic bonds
(D) None of the above

Question No:17

Richest source of vitamin ‘C’ is

(A) Lemon
(B) Orange
(C) Emblica officinalis
(D) Capsicum fruitesence

Question No:18

How many nucleotides in mRNA code for one amino acid?

(A) 1
(B) 2
(C) 3
(D) 4

Question No:19

Nitrogenous bases present in DNA

(A) Adenine guanine, cytosine, thymine
(B) Adenine, guanine, cytosine, uracil
(C) Adenine, thymine, uracil
(D) Guanine, uracil

Question No:20

DNA replication occurs during which part of cell cycle?

(A) G₁– phase
(B) S – phase
(C) G₂ – phase
(D) Dividing phase