Question

Which of the following sequences code have four pyrimidines?

• A. AGGATC
• B. TTGGAAC
• C. TTCCAAG
• D. All of the above

Answer 1

The correct option is C TTCCAAG

Both DNA and RNA have four bases, that includes two purines and two pyrimidines, in the nucleotide chains. There are two purines namely adenine and guanine and three pyrimidines namely cytosine, thymine and uracil. Option A has 4 purines ( 2 As and 2 Gs) and two pyrimidines. Option B has 4 purines ( 2 As and 2 Gs) and 3 pyrimidines ( 2 Ts and C). Option C has 3 purines ( 2 As and G) and 4 pyrimidines ( 2 Ts and 2 Cs). Hence, option C is correct.