Which of the following nitrogen bases is found only in RNA and NOT in DNA?
A) uracil B) adenine C) guanine D) cytosine E) thymine
Answer: A
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Human chorionic gonadotropin (hCG)
a. is produced by the amnion. b. can be used to reveal pregnancy. c. is stored in the ovaries. d. acts as a hormone signaling menstruation. e. is needed to form the placenta.
Which of the following genetic problems is
NOT being addressed by gene therapy?
a. Down syndrome b. cystic fibrosis c. hemophilia d. immune disorder e. cancers
The region of the large intestine that stores feces is the ____
a. cecum b. rectum c. appendix
d. sigmoid colon e. descending colon
Cilia and flagella of eukaryotic cells are composed of
A. nine triplets of microtubules in a circle. B. protein fibers in a helical arrangement. C. actin filaments in a 9 + 2 arrangement. D. microtubules in a 9 + 2 arrangement.