Biology Botany study Material JIPMER,NEET UG Medical/Dental,AIIMS

NEET UG Botany MCQ-113

Question No:1

The 3′-5′ phosphodiester linkages inside a polynucleotide chain serve to join

(A) One DNA strand with the other DNA strand
(B) One nucleoside with another nucleotide
(C) One nucleotide with another nucleotide
(D) One nitrogenous base with pentose sugar

Question No:2

Which one of the following enzyme is responsible for the synthesis of DNA from RNA

(A) DNA polymerase
(B) RNA polymerase
(C) Reverse transcriptase
(D) DNA ligase

Question No:3

In Eukaryotic cell transcription, RNA splicing and RNA capping take place inside the

(A) Ribosome
(B) Nucleus
(C) Dictyosomes
(D) ER

Question No:4

The 3′-5′ phosphodiester linkages inside a polynucleotide chain serve to join

(A) One DNA strand with the other DNA strand
(B) One nucleoside with another nucleotide
(C) One nucleotide with another nucleotide
(D) One nitrogenous base with pentose sugar

Question No:5

There is no DNA in

(A) Mature RBC’s
(B) A mature spermatozoan
(C) Hair root
(D) An enucleated ovum

Question No:6

In the DNA molecule

(A) The total amount of purine nucleotides and pyramidine nucleotides is not always equal
(B) There are two strands which run parallel in the 5’—>3′ direction
(C) The proportion of adenine in relation to thymine varies with the organism
(D) These are two strands which run antiparallel one in 5 —> 3′ direction and other in 3′ —> 5′

Question No:7

Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with category mentioned against it

(A) Thymine, Uracil – Pyrimidines
(B) Uracil, cytosine – Pyrimidines
(C) Guanine, Adenine – Purines
(D) Adenine, Thymine – purines

Question No:8

Which one of the following is not a constituent of cell membrane?

(A) Cholestrol
(B) Glycolipids
(C) Proline
(D) Phospholipids

Question No:9

The two polynucleotide chains in DNA are

(A) Parallel
(B) Discontinuous
(C) Antiparallel
(D) Semiconservative

Question No:10

About 98 perent of the mass of every living organism is composed of just six elements including carbon hydrogen, nitrogen, oxygen and

(A) Phosphorous and sulphur
(B) Sulphur and magnesium
(C) Magnesium and sodium
(D) Calcium and phosphorous

Question No:11

Antiparallel strands of a DNA molecule means that

(A) The phosphate groups of two DNA strands at their ends, share the same position
(B) The phosphate groups at the start of two DNA strands are in opposite position (pole)
(C) One strand turns clockwise
(D) One strand turns anti clockwise

Question No:12

One turn of the helix in a B – form DNA is approximately

(A) 0.34 nm
(B) 3.4 nm
(C) 2nm
(D) 20nm

Question No:13

Which one of the following hydrolyses internal phosphodiester bonds in a polynucleolide chain?

(A) Lipase
(B) Protease
(C) Endonuclease
(D) Exonuclease

Question No:14

The following ratio is generally constant for a given species

(A) (A+ G)/(C+T)
(B) (T+C)/(G+A)
(C) (G + /(A+T)
(D) (A+C)/(T+G)

Question No:15

Which form of RNA has a structure resumbling clover leaf

(A) r RNA
(B) hn RNA
(C) m RNA
(D) t RNA

Question No:16

During replication of a bacterial chromosomes, DNA synthesis starts from a replication origin site and

(A) RNA Primers are involved
(B) Facilitated by telomerase
(C) Moves in one direction of the site
(D) Moves in bidirectional way

Question No:17

Change in the sequence of nucleotide in DNA is called as

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

Question No:18

In a DNA percentage of thymine is What is the peercetage of guanine?

(A) 20%
(B) 40%
(C) 30%
(D) 60%

Question No:19

Which of the following enzymes are used to join bits of DNA

(A) Ligase
(B) Primase
(C) DNA polymerase
(D) Endonuclease

Question No:20

Collagen is

(A) Fibrous protein
(B) Globular protein
(C) Lipid
(D) Carbohydrate