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Genetics and heredity — Question 20

QCAA 2022, Paper 1 · 1 mark

Q20 · 2022 · Paper 1Unclassified1 mark

QUESTION 20

A section of DNA is made up of two strands, I and II.

Base

Strand I composition

Strand II composition

adenine

cytosine

25%

guanine

14%

thymine

29%

It can be inferred that

(A) strand I contains 25% cytosine.

(B) strand I contains 32% adenine.

(C) strand II contains 29% thymine.

(D) strand II contains 71% adenine.

References

Question 8 Modified from LotkaVolterra en.svg — Wikimedia Commons 2010, https://commons.wikimedia.org/wiki/ File:LotkaVolterra_en.svg, CC BY-SA 3.0.

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