THE MOLECULAR BASIS OF INHERITANCE
THE SEARCH FOR INHERITABLE MATERIAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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hydrogen bonds (between the sugar and phosphate)
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hydrogen bonds (between the bases)
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covalent bonds (between the sugar and phosphate)
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covalent bonds (between the bases)
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Detailed explanation-1: -In general, DNA is replicated by uncoiling of the helix, strand separation by breaking of the hydrogen bonds between the complementary strands, and synthesis of two new strands by complementary base pairing.
Detailed explanation-2: -Key enzyme involved in DNA replication, it is responsible for ‘unzipping’ the double helix structure by breaking the hydrogen bonds between bases on opposite strands of the DNA molecule.
Detailed explanation-3: -The nitrogenous bases of each strand face each other and complementary bases hydrogen bond to each other, stabilizing the double helix. Heat or chemicals can break the hydrogen bonds between complementary bases, denaturing DNA.
Detailed explanation-4: -Helicase is the enzyme that breaks the hydrogen bonds between the bases of DNA. During DNA replication, helicase melts the hydrogen bonds between complementary base pairs.