Question

The nucleotide sequence of one of the DNA strands is

Hint:

In double stranded DNA, GC percentage can be calculated directly from one strand because the complementary strand contributes matching \(G\) and \(C\) bases.

Answer 1

Correct Answer: 55.56

Step 1: Define GC content.
GC content is the share of bases that are guanine or cytosine, written as a percent of all bases.

Step 2: Take the strand.
The strand is GCTGTAACGATAGCACGC, which has $18$ bases in total.

Step 3: Count G and C.
Counting through, there are $5$ G's and $5$ C's, giving $10$ GC bases.

Step 4: Work out the percent.
\[ \frac{10}{18}\times 100 = 55.55\ldots \approx 55.56\% \] and the complementary strand has the same GC count, so the double strand value is the same.

Step 5: Answer.
\[ \boxed{55.56\%} \]