If a drug interferes with the activities of transfer RNA, which one of the following is likely to occur?
A. DNA will not be able to make copies of itself.
B. Proteins will not be produced.
C. Mutations will occur to the DNA.
D. Messenger RNA will not be manufactured.
B. Proteins will not be produced.
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Animal cells are permeable to water and urea but NOT to sucrose. The inside of a cell contains 1 M sucrose and 1 M urea and the outside 1 M sucrose and 2 M urea. The solution inside with respect to outside the cell is
A. hypotonic. B. turgid. C. isotonic. D. saturated. E. hypertonic.
Which of these would be an effective method of controlling yeast populations in a test sample?
a. constant stirring to break up biofilms b. percolating oxygen through the sample c. adding enzymes to inhibit mating factor d. adding antibiotics to the test sample
What can be deduced from this DNA fingerprinting evidence?
1.The boyfriend cannot be ruled out as a suspect.
2.The victim’s cells got mixed with the perpetrator’s semen at the scene.
3.Suspect 2 cannot be ruled out from these results.
4.The only potential perpetrator is suspect 1.
mRNA molecules are exported from the nucleus to the cytoplasm via
a. a consensus sequence located at the 3?terminus. b. the 7-methylguanosine cap structure. c. importin. d. associated proteins that contain export signals.