The process by which the base sequence of an RNA molecule is used to direct the synthesis of a protein is called
A. reverse transcription.
B. translation.
C. replication.
D. transcription.
Answer: B
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Which of the following is not a type of bacterial DNA recombination?
A. Transformation B. Transduction C. Conjugation D. Mitosis
Guard cells control their volume, and thus size:
A. by increasing the amount of solutes such as K+ and Cl-. B. by reducing the amount of solutes such as K+ and Cl-. C. by increasing the amount of water in the cells without changing solute concentration. D. by decreasing the amount of water in the cells without changing solute concentration. E. by increasing the amount of CO2 in the cells.
Which of the following types of physical mutagens produces thymine dimer mutations?
A. ultraviolet light B. X-rays C. microwave D. gamma rays E. ionizing radiation
Histone modifications that play a role in silencing expression of tumor suppressor genes are influenced directly by
A) microRNAs. B) epidermal growth factor signaling. C) p53 activity. D) carcinogens. E) APC activity.