Bacteriophages' genomes are typically composed of
A) single-stranded RNA.
B) single-stranded DNA.
C) double-stranded RNA.
D) double-stranded DNA.
Answer: D
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Melatonin secretion influences ____
a. secondary sex characteristics b. glucagon production c. adrenal function d. seasonal affective disorder e. Graves’ disease
If a DNA sequence is altered from TAGCTGA to TAGTGA, what kind of mutation has occurred? View Available Hint(s) If a DNA sequence is altered from TAGCTGA to TAGTGA, what kind of mutation has occurred?
a. None. b. Addition. c. Both addition and deletion. d. Deletion.
The right cerebral hemisphere
A) controls movements of the right side of the body. B) is smaller in women than men. C) is logical. D) is slightly larger than the left cerebral hemisphere. E) controls movements of the left side of the body.
In the lac operon, what occurs in the presence of lactose?
The same thing occurs in the presence and absence of lactose in the lac operon. Lactose binds to the repressor protein, allowing RNA polymerase to bind to the operator, and transcription occurs. Lactose binds to RNA polymerase and transcription cannot occur. Lactose binds to RNA polymerase, RNA polymerase becomes activated, and transcription occurs. A repressor protein competes with lactose for a position on the operator, thus making transcription a competitive process.