Q110 · Practice questionSimple familiar1 mark
QUESTION 110
Two DNA samples contain the same percentages of A, T, G and C. Which additional information is required to determine whether a particular gene has the same base sequence in both samples?
(A)
Whether each sample contains hydrogen bonds.
(B)
Whether cytosine occurs in both samples.
(C)
The order of bases in the gene in each sample.
(D)
Whether both samples contain phosphate.
WORKED SOLUTION
1 markAnswer C
Answer
C
Working
Overall base proportions do not specify base order. Different sequences can contain the same numbers of each nucleotide.
Marking criteria
- Select C. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabus