THE MOLECULAR BASIS OF INHERITANCE
THE HUMAN GENOME
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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restriction enzymes
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gel electrophoresis
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karyotypes
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haplotypes
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Detailed explanation-1: -Answer and Explanation: The correct answer is D. restriction enzymes. Restriction enzymes, which are produced naturally by bacteria as a defense against viruses, recognize and cut DNA into pieces at specific sequences.
Detailed explanation-2: -How do restriction enzymes work? Like all enzymes, a restriction enzyme works by shape-to-shape matching. When it comes into contact with a DNA sequence with a shape that matches a part of the enzyme, called the recognition site, it wraps around the DNA and causes a break in both strands of the DNA molecule.
Detailed explanation-3: -Restriction enzymes, found naturally in bacteria, can be used to cut DNA fragments at specific sequences, while another enzyme, DNA ligase, can attach or rejoin DNA fragments with complementary ends.
Detailed explanation-4: -Restriction enzymes, also called restriction endonucleases, recognize a specific sequence of nucleotides in double stranded DNA and cut the DNA at a specific location.
Detailed explanation-5: -A restriction enzyme cuts DNA while DNA ligase pastes DNA.