NEET UG Botany MCQ-112

Question No:1

Which of the following elements is an activator for both ribulose biphosphate carboxylase oxygenase and phosphoenol pyruvate carboxylase in photosynthetic carbon fixation?

(A) Mg+2
(B) Zn+2
(C) Ca2+
(D) SO4-2

Question No:2

Which of the following is an organic molecule needed by the body in small amounts?

(A) Protein
(B) Zinc
(C) Vitamin-c
(D) Monosaccharide

Question No:3

A bond formed between carboxyl group of one amino acid and amino group of adjacent amino acid is called

(A) Peptide bond
(B) Hydrogen bond
(C) Covalent bond
(D) All of these

Question No:4

The Functional unit of DNA molecule that codes for a particular gene product is

(A) Cistron
(B) Exon
(C) Intron
(D) Gene

Question No:5

Antiparallel strands of a DNA molecule means that

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

Question No:6

ATP is a

(A) Nucleotide
(B) Nucleosome
(C) Purine base
(D) Nucleoside

Question No:7

Anticodon is present on

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

Question No:8

RNA and DNA are similar in

(A) Having similar sugars
(B) Having similar pyrimidine bases
(C) Being capable to replicate
(D) Being polymers of nuclotides

Question No:9

The length of one turn of the helix in a B- form DNA is approximately

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

Question No:10

E-coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation will be correct?

(A) Both the strands of DNA will be radioactive
(B) One strand radioactive
(C) Each strand half radioactive
(D) None is radioactive

Question No:11

The enzyme which help to cut one strand of DNA duplex to release tension of coiling of two strands is

(A) DNA ligase
(B) DNA polymerase
(C) Topo isomerase
(D) Swielase (helicase and hemichordata

Question No:12

DNA repairing is done by

(A) Ligase
(B) DNA polymerase III
(C) DNA polymerase II
(D) DNA polymerase I

Question No:13

Which of the following sugar is found in nucleic acid?

(A) Dextrose
(B) Glucose
(C) Levulose
(D) Deoxyribose

Question No:14

Which of the following stage during meiosis is concerned with DNA replication ?

(A) Interphase
(B) Prophase
(C) Metaphase
(D) Anaphase

Question No:15

Interferons are

(A) Pesticide
(B) Weedicide
(C) Anti-viral proteins
(D) Anti-bacterial proteins

Question No:16

DNA nucleotides are attached by

(A) Hydrogen bonds
(B) Covalent bonds
(C) Vander wall’s force
(D) Electrovalent bonds

Question No:17

The nerve transmitter, produced at the synapse and neuromuscular junction is

(C) Acetylcholine
(D) Phosphokinase

Question No:18

Which of the following initiates transcription of m-RNA on particular DNA template

(A) t-RNA
(B) Stigma factor
(C) Core enzyme
(D) None of these

Question No:19

Which one of the most abundant protein in the animal world?

(A) Trypsin
(B) Haemoglobin
(C) Collagen
(D) Insulin

Question No:20

Select the two statements out of the four (1-4) given below about lac operon
1) Glucose (or) galactose may bind with the represser and inactivate it
2) In the absence of lactose, the represser binds with the operator region
3) The Z-gene codes for permease
4) This was elucidate by Francois Jacob and Jacques Monod

The correct statements are

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