Where are the introns removed from during MRNA post-transcriptional editing?
a. in the cytoplasm
b. in the endoplasmic reticulum
c. in the nucleus
d. They are not removed.
c. in the nucleus
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In the Lederberg and Tatum experiment what is the purpose of performing the experiment with the strains without adding them together?
A. It serves as a control to calculate the rate of reversion mutations B. There is no experimental purpose to performing that part of the experiment C. It tests that the strains were made correctly D. It tests to make sure the media was made correctly
Outline at least 3 ecological roles of marine flowering plants
What will be an ideal response?
Microevolution is the result of all of the following EXCEPT
a. chance variation. b. change in gene frequency. c. mutation. d. natural selection. e. large scale patterns or trends.
As helicase unwinds the DNA molecule, what keeps the strands apart?
A) DNA polymerase B) Reverse transcriptase C) Replication fork D) Single-strand binding proteins E) Okazaki fragments