a. i - VCE - SSCE Chemistry - Question 6 - 2011 - Paper 1
Question 6
a. i. The letters GATAC represent a part of the base sequence in one strand of DNA:
In the boxes provided write the base sequence of the complementary strand of DNA.... show full transcript
Worked Solution & Example Answer:a. i - VCE - SSCE Chemistry - Question 6 - 2011 - Paper 1
Step 1
i. Write the complementary base sequence.
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Answer
The complementary base sequence for GATAC is CTACT.
Step 2
ii. Determine the number of hydrogen bonds.
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Answer
Between the base pairings:
G and C form 3 hydrogen bonds.
A and T form 2 hydrogen bonds.
In the sequence GATAC, we have:
2 G-C pairs: 2×3=6 hydrogen bonds.
3 A-T pairs: 3×2=6 hydrogen bonds.
Total hydrogen bonds = 6+6=12.
Step 3
b. Name the reactants.
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Answer
The reactants that combine in the condensation reactions to form this nucleotide are:
