If you repeated the Hershey and Chase experiment designed to determine the molecule of heredity using a virus with RNA as its genetic material, you would expect that
A) 35S-labeled protein would be transferred to infected cells.
B) 32P-labeled DNA would be transferred to infected cells.
C) 32P-labeled RNA would be transferred to infected cells.
D) 32P-labeled RNA would be transferred to phage ghosts.
E) 35S-labeled RNA would be transferred to infected cells.
C) 32P-labeled RNA would be transferred to infected cells.
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In the field of plant transgenics, the use of the bacterium Agrobacterium tumefaciens has proven usefulbecause:a
it is not attacked by plant immune systems. b. it has been genetically engineered to penetrate the plant cell wall. c. it can directly modify the plant genome, causing it to make useful products for humans. d. it is found naturally in almost all species of plants. e. it is able to transfer a plasmid into host plant cells.
In the female gametophyte, two cells flanking the egg secrete a ________ that guides the pollen tube's growth from the bottom of the style to the egg.
Fill in the blank(s) with the appropriate word(s).
For a lambda phage in lysogeny, why is a repressor protein required to block the lytic cycle from the beginning?
What will be an ideal response?
Which of the following is NOT related to genetic drift?
A. Bottleneck effect B. Neutral variation C. Non-Darwinian evolution D. Founder effect E. Sexual selection