Question

question 37
which phrase best describes the structure of dna?
a a twisted single strand
b a firemans ladder
c a double helix
d a triple helix
question 38
what is meant by “semiconservative” replication?
a as the new strands of dna are formed, the old strands are broken down and recycled.
b as the new strands of dna are formed, one of the old strands is broken down and recycled while the other is used as a template for the creation of a new strand.
c the original strands of dna are used to make newer strands, resulting in two copies of the dna, one made entirely of new dna, the other entirely of old dna.
d as dna replication occurs, two new strands of dna are produced without use of the original strands.
e each newly replicated strand of dna consists of one original strand and one newly formed strand.

Explanation:

DNA is a double - stranded molecule with a helical structure, known as a double helix. Semiconservative replication means that during DNA replication, each new DNA molecule consists of one original strand and one newly synthesized strand.

Answer:

Question 37: C. A double helix
Question 38: E. Each newly replicated strand of DNA consists of one original strand and one newly formed strand.