Replication of DNA produces two daughter DNA molecules in which?

Question

a) one daughter molecule contains both parent strands and one daughter molecule contains both newly synthesized strands

b) each daughter molecule contains one parent strand and one newly synthesized strand

c) each daughter molecule contains two newly synthesized strands

d) each daughter molecule contains both parent strands

Answer 1

b) each new molecule is half from the parent, plus a newly-synthesized complementary half.

Picture it like this - let's say we have one side of the parent with bases A,B,C and the other side with bases X,Y,Z. A always pairs with X, B with Y, and C with Z. For ease of identification only, parent bases will be represented with uppercase letters, and daughter bases with lowercase.

So the parent is:
A< B< C<
They are separated into:
A<........ B<........ C<........
Then daughter bases are added to both parents:
A< B< C<
And you end up with two identical copies, each with half from the parent, and half new.

Answer 2

b. 2 strands of dna are used as templates for 2 new dna molecules. In DNA replication, the two strands of a DNA molecule separate and then each and every strand serves as a instruction manual (stated as a template), for the different 0.5 of the double strand. the effect is two new double-stranded DNA molecules, each and every with one strand from the unique molecule and each with one newly replicated strand.