The surface receptors that recognize and bind signaling molecules are ____
a. glycoproteins
b. glycolipids
c. phospholipids
d. promoters
e. ligands
ANSWER: a
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When we compare levels of genetic variation in a contemporary African population to that of a contemporary non-African population, we find there is:
A. more variation in the African population. B. more variation in the non-African population. C. equal variation in both populations. D. no consistent pattern: sometimes we find more variation in the African population and sometimes we find more in the non-African population. E. None of the answer options are correct.
An embryo with two X chromosomes will develop female characters because of
a. the presence of female hormones in development. b. the absence of testosterone during early embryology. c. the SRY regions of the X chromosomes. d. maternal substances passed to the zygote during fertilization. e. human chorionic gonadotropin.
Which of the following is a true statement regarding lysosomes?
A) The lysosome may mature from a late endosome. B) The lysosome may function in glycosylation. C) The contents of the lysosome originate in the smooth ER. D) The lysosome functions in export packaging. E) None of these are correct.
In the process of ________, microbes detect the presence and density of other microbes and modify their metabolic activity in response
A) quorum sensing B) antagonism C) mutualism D) symbiosis E) synergy