Question

Q1) the opening of double stranded DNA during replications create a lot of torsional stress this stress to prevent the DNA from unwinding uncontrollably

a)DNA polymerase

b) dna helicase

c) topoisomerase

d) telomerase

Q2)

in order to identify an individual by DNA analysis of their blood, researchers look for which of the following

a) chromosomes

b) genes

c) dna fingerprints

d) restriction endonucleases

Answer 1

1).(c)topiosomerase

Topoisomerases are enzymes that participate in the overwinding or underwinding of DNA. The winding problem of DNA arises due to the intertwined nature of its double-helical structure.

2).(c)dna fingerprints

DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. If the two DNA profiles are a match, then the evidence came from that suspect.