Tamil Nadu (English Medium) Plus 2 Biology Science Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Which of the following cuts DNA from specific places?

(A) phosphatase	(B) ligase
(C) exonuclease	(D) restriction endonuclease

Question-2
In transgenics, expression of transgene in target tissue is determined by

(A) reporter	(B) enhancer
(C) transgene	(D) promoter

Question-3
In prokaryotes, the genetic material is

(A) linear DNA with histones	(B) circular DNA with histines
(C) linear DNA without histones	(D) circular DNA without histones

Question-4
DNA replication occurs

(A) after meiosis	(B) after mitosis
(C) prior to mitosis	(D) all of these

Question-5
Somatic hybridization is a technique of

(A) natural breeding	(B) natural pollination
(C) artificial pollination	(D) making a hybrid between two somatic cells

Question-6
DNA acts as a template for the synthesis of

(A) RNA	(B) DNA
(C) protein	(D) both'1' and '2'

Question-7
The unwinding of DNA duplex is performed by an enzyme called

(A) lygase	(B) maltase
(C) gyrase	(D) lactase

Question-8
The genetic material in HIV is

(A) single -stranded RNA	(B) double-stranded RNA
(C) single-stranded DNA	(D) double-strande DNA

Question-9
Which of the following is used in genetic engineering?

(A) nuclease	(B) RNA polymerase
(C) DNA polymerase	(D) restriction endonuclease

Question-10
In DNA helix, cytosine is paired with guanine by

(A) covalent bond	(B) phosphate bond
(C) two hydrogen bonds	(D) three hydrogen bonds

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Plus 2 Biology Science

Tamil Nadu (English Medium)

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