Question

question 9
when one dna molecule is duplicated, the resulting two dna molecules contain.
a one new and one old strand in each.
b two new strands in one and two old strands in the other.
c four new strands in each.
d four old strands in each.
e four new strands in one and four old strands in the other.
question 10
if one strand of dna has the sequence attgtcc, then the sequence of the complementary strand would be
a taacagg.
b cggagtt.
c acctcgg.
d cctgtta.

Explanation:

For Question 9, DNA replication is semi - conservative, meaning each new DNA molecule has one old (parental) strand and one new strand. For Question 10, in DNA base - pairing, A (adenine) pairs with T (thymine) and G (guanine) pairs with C (cytosine). So for the sequence ATTGTC, the complementary sequence is TAACAGG.

Answer:

Question 9: A. one new and one old strand in each.
Question 10: A. TAACAGG.