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
Three crops that contribute maximum to the global food grain production are

(A) wheat, rice and maize	(B) wheat,rice and barley
(C) rice, maize and sorghum	(D) wheat, maize and sorghum

Question-2
If recombination of the gene is 50%, the linkage will be

(A) cis	(B) trans
(C) complete	(D) incomplete

Question-3
DNA elements, which can switch their position, are called

(A) exons	(B) introns
(C) cistrons	(D) transposons

Question-4
The known sequences of DNA, used to find complementary DNA strands, are

(A) vector	(B) plasmid
(C) DNA probe	(D) recombinant DNA

Question-5
The restriction endonuclease is used for cutting

(A) m-RNA	(B) RNA fragment
(C) single-strand DNA	(D) double-stranded DNA

Question-6
The experimental demonstration of the semiconservative mode of DNA replication was given by

(A) Watson and Crick	(B) Bawden and Pirie
(C) Meselson and Stahl	(D) Huberman and Riggs

Question-7
The restriction endonuclease is used for cutting

(A) m-RNA	(B) RNA fragment
(C) single-strand DNA	(D) double-stranded DNA

Question-8
The genetic material in × 174 is

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

Question-9
The Ti plasmid is often used for making transgenic plants. This plasmid is found in

(A) Azotobacter	(B) Agrobacterium
(C) yeast as a 2 m plasmid	(D) roots of leguminous plants.

Question-10
Linkage was first observed in

(A) pea	(B) field pea
(C) sweet pea	(D) grass pea

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Plus 2 Biology Science

Tamil Nadu (English Medium)

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