THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5’-GGCCTACGTATC-3’
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‘3-GGCCUACGUAUC-5’
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3’-GGCCTACGTATC-5’
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‘5-GGCCUACGUAUC-3’
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Detailed explanation-1: -The given strand has a sequence 5’-GAATTG-3’. Hence the complementary strand will have a sequence 5’-CAATTC-3’. Thus the correct answer is option A.
Detailed explanation-2: -Adenine makes the double bond with thymine while guanine makes the triple bond with cytosine which means adenine and thymine are complementary base pairs and cytosine and guanine are complementary base pairs. The complementary sequence for the DNA strand 5’ ATCGAACGT 3’ is 3’ TAGCTTGCA 5’.
Detailed explanation-3: -So, the sequence of the complimentary strand in 5’ to 3’ direction is 5’-GCATGCATGCATGCATGCATGCATGCAT− 3’.
Detailed explanation-4: -Each end of DNA molecule has a number. One end is referred to as 5’ (five prime) and the other end is referred to as 3’ (three prime). The 5’ and 3’ designations refer to the number of carbon atom in a deoxyribose sugar molecule to which a phosphate group bonds.