The poly A tail of an mRNA molecule was removed by a deadenylase enzyme before it is recognized by the ribosomes. What will happen to this mRNA? a. It will not be translated anymore and will be degraded. b. It will get stuck in the small ribosomes since it will be difficult to set the proper start site. c. The reading frame of translation will change. d.The mRNA will be bound by the ribosomes for translation.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. The poly A tail of an mRNA molecule was removed by a deadenylase enzyme before it is recognized by the ribosomes. What will happen to this mRNA?

a. It will not be translated anymore and will be degraded.
b. It will get stuck in the small ribosomes since it will be difficult to set the proper start site.
c. The reading frame of translation will change.
d.The mRNA will be bound by the ribosomes for translation.
 
2. Which of the following is true regarding these DNA repair mechanisms?
a. Non-homologous end joining is less likely to produce mutations than homologous recombination.
b. Errors during DNA synthesis that are not caught by the replication machinery can be corrected by mismatch repair.
c. DNA damage from chemical reactions cannot be undone.
d. Proofreading from DNA polymerase I reduces the error rate in DNA to about 1 in 100 nucleotides.
 
3. Which of the following enzymes involved in DNA replication correctly pairs with its function?
a. Helicase seals gaps between DNA fragments.
b. DNA polymerase I opens the DNA at the replication fork.
c. DNA gyrase work ahead of the replication fork to prevent supercoiling.
d. DNA primase extends primers by adding nucleotides to the 3' end
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