NEET Botany MCQ-146

Question No:1

Select the option having all correctly matched pairs.
A. Alkaloids
B. Pigments
C. Drugs

(i) Carotenoid; Anthocyanin
(ii) Vinblastin; curcumin
(iii) Morphine;Codeine

(A) A-i; B-ii;C-iii
(B) A-ii; B-iii; C-i
(C) A-iii; B-i; C-ii
(D) A-i; B-iii; C-ii

Question No:2

Translocase is an enzyme required for

(A) DNA replication
(B) RNA synthesis
(C) Initiation of protein synthesis
(D) Protein synthesis chain elongation

Question No:3

Center of DNA Finger Printing and Diagnostics (CDFD) is located at

(A) Delhi
(B) Chennai
(C) Kolkata
(D) Hyderabad

Question No:4

In which of the following combinations, the compounds in ascending order based on their molecular weights are arranged?

(A) DNA, RNA, AMP, ADP, ATP
(B) DNA, RNA, ATP, ADP, AMP
(C) AMP, ADP, ATP, RNA, DNA
(D) AMP, ATP, ADP, DNA, RNA

Question No:5

In prokaryotes, the process of replication is catalysed by the following enzymes. Identify which of the enzyme is best co-ordinate with the role

(A) Helicase – joins the ends of DNA segments
(B) DNA polymerase-I – synthesis DNA
(C) DNA polymerase-II – erases primer and fills gaps
(D) Primase – synthesises RNA primers.

Question No:6

FAD is a co – enzymes derive from

(A) Riboflavin
(B) Vitamin – B12
(C) Thiamine
(D) Niacin

Question No:7

A : DNA fingerprinting involves identifying differences in some specific regions in DNA sequence.
R : In repetitive DNA sequences, a small stretch of DNA is repeated many times

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false
(D) Both (A) are (R) wrong

Question No:8

What is the first step in the southern blot technique

(A) Denaturation of DNA on the gel for hybridization with specific probe
(B) Production of a group of gentically identical cells
(C) Digestion of DNA by restriction enzyme
(D) Denaturation of DNA from a nucleated cell such as the one from the scence of crime

Question No:9

Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?

(A) UUA -valine
(B) AAA- lysine
(C) AUG -cysteine
(D) CCC – alanine

Question No:10

Age of fossils in the past was generally determined by radio carbon method and other methods involving radioactive elements found in the rock. More precise methods, which were used recently and led to the revision of the evolutionary period for different group of organisms includes

(A) Study of carbohydrates/proteins in fossils
(B) Study of the condition of fossilization
(C) Electron spin resonance (ESR) and fossil DNA
(D) Study of carohydrates, proteins in rocks

Question No:11

Cellulose, the most important constituents of plant cell wall is made up of

(A) Branched chain of glucose molecules lined by ?, 1,6, glycosidic bond at the site of branching
(B) Unbranched chain of glucose molecules linked by ?, 1,4, glycosidic bonds
(C) Branched chain of glucose molecules linked by ?,1,4 , glycosidic bond at the site of branching
(D) Unbranched Chain of glucose molecules linked by ?, 1,4, glycosidic bond

Question No:12

A : Replication and transcription occur in the nucleus but translation occur in the cytoplasm
R : m-RNA is transfered from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis

(A) Both A and R are true and the reason is the correct explanation of the A
(B) Both A and R are true and R is not the correct explanation of ‘A’
(C) A is true and R is False
(D) A are R, both are false

Question No:13

Which one of the following pairs is correctly matched with regard to the codon and the amino aciad coded by it?

(A) UUA – Valine
(B) AAA – Lysine
(C) AUG – Cysteine
(D) CCC – Alanine

Question No:14

What is true about t-RNA?

(A) It binds with an amino acid at it 3 ‘end
(B) It has five double stranded regions
(C) It has a codon at one end which recognizes
(D) It look like clover leaf in the three dimensional structure

Question No:15

Proteins are

(A) Polysaccharides
(B) Polyamides
(C) Polynucleotides
(D) Polyglycol

Question No:16

Major protein in connective tissue is

(A) Myosin
(B) Collagen
(C) Melanin
(D) Keratin

Question No:17

HIV has a protien coat and genetic material

(A) ss RNA
(B) ds RNA
(C) ss DNA
(D) ds DNA

Question No:18

Okazaki fregments form

(A) Leading strand
(B) Lagging strand
(C) Non – sense strand
(D) Senseful strand

Question No:19

The name of Vitamin C is

(A) Ascorbic acid
(B) Glutamic acid
(C) Aspartic acid
(D) Enolic acid

Question No:20

(A) : Histones are basic protiens of major importance in packaging of eukaryotic DNA,DNA and histones comprise chromatin forming the bulk of evkaryotic chromosomes
(R) : Histones are five major types H1,H2, H3 and H4

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false
(D) Both (A) are (R) wrong