What would the complementary DNA bases for the strand ATTGAC be?

TAACTG

Explanation: Remember the base pairing rules: cytosine with guanine and adenine with thymine. To compliment the given strand, you'd have to choose the base that would pair with each individual nucleotide.

For example,

The pair to ACCTGAC  would be TGGACTG.

Hope this helps,

Lacia

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