The backbone or sides of a DNA helix consists of
A. an adenine-ribose chain.
B. nitrogen base pairs.
C. a sugar-phosphate chain.
D. a glucose-phosphate chain.
Answer: C
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Which hormone is secreted by modified cells in the heart wall in response to high blood volume or pressure?
A. Renin B. Erythropoietin C. Atriopeptin D. Angiotensin I E. Angiotensin II
Before specific defenses are activated, most antigens must
A) infect cells. B) be processed by a phagocyte. C) either infect cells or be processed by a phagocyte. D) depolarize the lymphocyte. E) bind to the DNA of the lymphocyte
Which of the following is a function of the mineralocorticoids, such as aldosterone?
A) help resist long-term stress B) increase blood glucose levels C) decrease edema D) suppress inflammation E) regulate salt content of the blood
The sarcoplasmic reticulum stores the substance ____________________
Fill in the blank(s) with correct word