Question

If the sequence of bases along one side of a DNA
molecule is AAGCT, then the complementary sequence
of bases on the other side of the DNA molecule is
(a) AAGCT
(c) UUCGA
(b) GGTAC
(d) TTCGA​

Answer 1

Answer:

$\huge\mathcal\red{aagct}$

Answer 2

The complementary sequence of baes on the other side of the DNA molecule is TTCGA.

• There are two types of nitrogen bases:

1.       Purines - Adenine, Guanine.
2. Pyrimidines - Thymine/uracil, cytosine.

• Purines contain two rings made of carbon and nitrogen whereas pyrimidines possess only one ring in the structure.
• Uracil is present in RNA whereas thymine is present in DNA.
• These purines and pyrimidines are complementary in nature.
• Adenine is complimentary with thymine/uracil whereas Guanine is complementary to Cytosine.

1. For every adenine base in a DNA strand, the other DNA possesses a Thymine moiety and for guanine, a cytosine moiety is present.

Henceforth, for AAGCT, the complementary sequence is TTCGA.