In general, most DNA viruses multiply in the host cell's ________, while most RNA viruses multiply in the host cell's ________.
A. cytoplasm; cell membrane
B. cell membrane; cytoplasm
C. cytoplasm; nucleus
D. nucleus; endoplasmic reticulum
E. nucleus; cytoplasm
Answer: E
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Epinephrine blocks the contraction of muscles in the airways. Which of the other activities of epinephrine is most likely to be regulated by the same type of pathway?
A. Increased sweating. B. Stimulation of heart muscle cell contraction. C. Promotes the breakdown of glycogen in skeletal muscle cells D. Inhibition of saliva production in salivary glands E. Contraction of smooth muscle cells in blood vessels.
Can two parents that have a genetic disorder ever have a normal child?
A. Yes B. No
Calcium moves into bones as new bone cells are formed, and moves out of bones as special cells break the bones down. Hormones that are produced by the thyroid and parathyroid glands help regulate this process. As bone cancer causes bones to break down, what might be observed in a patient's body chemistry?
A. Calcium would be released into the blood stream, causing high calcium levels. B. Calcium levels would always remain constant, as the thyroid and parathyroid glands would compensate. C. Calcium would be absorbed into the bones, causing low blood calcium levels.
Which protist causes African sleeping sickness?
A) Didinium B) Plasmodium C) Giardia D) Trypanosoma E) Pfiesteria