The main function of salivary amylase is to ________
A) moisten food
B) break down proteins
C) absorb nutrients
D) break down starch
D
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Which of the following is not true about anoxygenic photosynthesis?
A. Does not produce oxygen and often produces sulfur granules B. Does not produce oxygen C. Water is the usual source of electrons for photosynthesis D. Often produces sulfur granules
To which class of neurotransmitters does substance P belong?
a. acetylcholine b. monoamines c. amino acids d. neuropeptides e. gaseous neurotransmitters
In a signal transduction pathway involving cAMP as a second messenger, after a G protein is
activated, the activated G protein then activates:a. phospholipase C. b. adenylyl cyclase. c. calmodulin. d. protein kinase. e. diacylglycerol.
Which of the following are found in roots?
A. vascular tissue only B. ground tissue only C. dermal and vascular tissue only D. dermal, vascular, and ground tissue