THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TTGCATG
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CCTAGCT
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AAGTATC
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GGATCGA.
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Detailed explanation-1: -Answer and Explanation: We are given that the template strand of DNA has the base sequence CCTAGCT. Because cytosine will almost always pair with guanine and adenine with thymine, we can say that the complimentary sequence to this will be GGATCGA.
Detailed explanation-2: -During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.
Detailed explanation-3: -Once the DNA strands have been unwound, they must be held apart to expose the bases so that new nucleotide partners can hydrogen-bond to them. The enzyme DNA polymerase then moves along the exposed DNA strand, joining newly arrived nucleotides into a new DNA strand that is complementary to the template.
Detailed explanation-4: -The complementary strand for DNA must follow the base pairing and polarity rules. Pairing means that A=T and G=C. Polarity means that the strands have to run in opposite directions. First write the correct base pairing below the original sequence and label the 5’ and 3’ ends.
Detailed explanation-5: -The two strands of DNA are complementary, meaning that the base sequence / the sequence of bases in one strand can help create the correct sequence of bases in the other strand. Because of this complementarity of the two strands, having one strand means that the recreation of the other strand is possible.