An erection of the penis results most directly from:a
the bone present in the penis.
b. dilation of the veins leading from the penis.
c. contraction of the muscles within the penis.
d. dilation of the arteries in the penis.
e. a blocking of enzymes within the penis
d
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Which enzyme is used by RNA viruses to directly replicate the viral RNA genome?
A. RNA-dependent DNA polymerase B. DNA-dependent RNA polymerase C. Reverse Transciptase D. RNA-dependent RNA polymerase
The scientist given credit for devising the two-word scientific naming system is
A. Carolus Linnaeus. B. Charles Darwin. C. Gregor Mendel. D. Aristotle. E. Louis Pasteur.
Many antibiotics cause mispairing between codons and anticodons. What fatal effect would this mispairing have on the cell?
What will be an ideal response?
Which of the following statements about pH is true?
A) The pH scale is a measure of oxygen ion concentration. B) A single unit change on the pH scale is equivalent to a 1% change in hydrogen ion concentration. C) An increase in hydrogen ion concentration means a decrease in pH scale units. D) Basic pH levels are less than 7.