The enzyme that HIV uses to convert its RNA into DNA is
A. DNA polymerase.
B. RNA integrase.
C. reverse transcriptase.
D. RNA polymerase.
E. translase.
Ans: C. reverse transcriptase.
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How is vitamin D (vitamin D3 ) related to calcium homeostasis in bone?
A) Vitamin D provides a framework for calcium in the matrix. B) Vitamin D is regulated by osteoclast activity. C) Vitamin D is produced by osteoblasts during endochondral ossification. D) Vitamin D is involved in calcium absorption by the digestive tract. E) Vitamin D replaces calcium in the skeleton.
A rise in cortisol would cause each of the following except one. Identify the exception.
A) increased ACTH levels B) higher levels of fatty acids in the blood C) enhanced rate of glucose synthesis by the liver D) increased rate of glycogen usage by the liver E) suppression of the immune system
Which type of water facility is commonly used in hatcheries?
a. ponds c. tanks b. raceways d. vats
An advantage of innate immunity is ________
A) its barriers that prevent pathogens from entering into the body B) the specificity of its individual cells which specialize in the removal on one type of antigen C) the numerous steps in the activation of its cells that can prevent autoimmune disease D) the use of antibodies to cause cell lysis and kill invading cells