During replication, a double-stranded DNA molecule opens up exposing the bases on each strand. Complementary bases line up with the bases on each of the exposed original strands, forming two new strands. The sequence of bases on one of the original strands is CGGTAGGG. What is the sequence of bases on its complementary strand of DNA? (SC.912.L.16.3)

Question

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1 point
CGGTAGGG
CGGTUGGG
GCCATCCC
GCCAUCCC

Answer 1

The sequence of bases on one of the original strands is CGGTAGGG. To find the complementary strand, we need to follow the base pairing rules of DNA:

• Cytosine (C) pairs with Guanine (G)
• Guanine (G) pairs with Cytosine (C)
• Adenine (A) pairs with Thymine (T)
• Thymine (T) pairs with Adenine (A)

Using these pairings, we can determine the complementary bases for the original sequence:

• C pairs with G
• G pairs with C
• G pairs with C
• T pairs with A
• A pairs with T
• G pairs with C
• G pairs with C

So, the complementary strand for the sequence CGGTAGGG will be:

GCCATCCC

Therefore, the correct answer is GCCATCCC.