AP BIOLOGY

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THE MOLECULAR BASIS OF INHERITANCE

RECOMBINANT DNA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are DNA recombinants used for? I. To produce sheep clones with special proteins in their milk II. To produce agriculturally important plants and animals which have better nutritional values III. To produce plants that have bacterial genes to destroy insect pests IV. To produce microbes that secrete enzymes to digest oil spillage
A
I and IV
B
III and IV
C
II, III and IV
D
I, II, III and IV
Explanation: 

Detailed explanation-1: -Recombinant DNA is used to identify, map and sequence genes, and to determine their function. rDNA probes are employed in analyzing gene expression within individual cells, and throughout the tissues of whole organisms.

Detailed explanation-2: -Recombinant DNA which is also known as genetic engineering changes the natural genetic characteristics of an organism by inserting foreign DNA. It is widely used in agriculture to form genetically modified organisms which further help to produced genetically modified crops.

Detailed explanation-3: -In basic research labs, biologists often use DNA cloning to build artificial, recombinant versions of genes that help them understand how normal genes in an organism function.

Detailed explanation-4: -Recombinant DNA technology requires both nucleases and ligases. II. Ligases produce nicks in the recombinant DNA molecule.

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