robin082006
Forum Hero
Topics: 471
Posts: 5,125
|
12. A child presents with severe growth failure, accelerated aging that causes adult complications such as diabetes and coronary artery disease, and microcephaly (small head) due to increased nerve cell death. In vitro assay of labeled thymidine incorporation reveals decreased levels of DNA synthesis compared to controls, but normal-sized labeled DNA fragments.The addition of protein extract from normal cells, gently heated to inactivate DNA polymerase, restores DNA synthesis in the child's cell extracts to normal. Which of the enzymes used in DNA replication is likely to be defective in this child?
a. DNA-directed DNA polymerase
b. Unwinding proteins
c. DNA polymerase I
d. DNA-directed RNA polymerase
e. DNA ligase
___________________
The Key to Succeed is Patience.
|
| doc179
Forum Guru
Topics: 67
Posts: 1,217
|
E?
|
| yasmeen
Forum Guru
Topics: 67
Posts: 936
|
c
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,125
|
try again, both of you, thanks
___________________
The Key to Succeed is Patience.
|
| doc179
Forum Guru
Topics: 67
Posts: 1,217
|
B? they have added some proteins and inactivated DNA polymerase.
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,125
|
YES B IS THE ANSWER
___________________
The Key to Succeed is Patience.
|
| vallia
Forum Guru
Topics: 98
Posts: 889
|
I 'm kinda confused are you talking about SSB proteins? cause they are not enzymes , or is something else?
___________________
fight possessed
|
|
| |
| | | | | | | |
