1. Tardigrade
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  3. Chemistry
  4. One strand of a DNA has the following sequence of bases: ATGCTATTCAG In its complementary strand, the number of adenine base units will be.

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Q. One strand of a $DNA$ has the following sequence of bases: $ATGCTATTCAG$
In its complementary strand, the number of adenine base units will be______.

NTA AbhyasNTA Abhyas 2022

Solution:

In $DNA$ molecule, adenine $\left(\right.A\left.\right)$ always pairs with thymine $\left(\right.T\left.\right)$ and cytosine $\left(\right.C\left.\right)$ always pairs with guanine $\left(\right.G\left.\right)$ .
The sequence of bases in the given strand is: $ATGCTATTCAG$
Thus, the sequence of bases in the complementary strand is: $TACGATAAGTC$
Therefore, there are $4$ adenine base units in the complementary strand.