Answer:
If a DNA strand has the base sequence TTCCGGAA the complementary strand has the sequence AAGGCCTT.
Step-by-step explanation:
A DNA molecule is constructed from sequences of its four nitrogenous bases: adenine, thymine, guanine and cytosine. Since DNA is made up of two strands, the sequence of nitrogenous bases of one strand is complementary to the other .
The complementarity of the bases is a characteristic of the nitrogenous bases in the nucleic acids to combine with their complementary base, which is the same as saying that purines complement with pyramidines.
- Adenine is combined with Thymine A=T
- Cytosine is complemented with Guanina C≡G
In this way, given a sequence on a DNA strand :
T-T-C-C-G-G-A-A
The complementary strand will have this sequence:
A-A-G-G-C-C-T-T