How many phosphates are found in ATP?
a. 2
b. 1
c. 3
d. 4
e. 5
c
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Which organ system(s) play role(s) in eliminating metabolic wastes from the body?
a. excretory system only b. respiratory system only c. nervous system only d. excretory and respiratory system e. excretory, respiratory, and circulatory system
What early evidence of continental drift was capable of being analyzed to determine ages of crusts?
a. Earthquakes b. Ridge temperatures c. Hydrothermal vents d. Core samples
All of the following are true concerning plasmids
EXCEPT that they a. are self-reproducing circular molecules of DNA. b. are sites for inserting genes for amplification. c. may be transferred between different species of bacteria. d. may confer the ability to donate genetic material when bacteria conjugate. e. are usually essential in bacteria.
Which process involves the movement of molecules or atoms down a concentration gradient across plasma membranes?
A) active transport B) passive transport C) exocytosis D) endocytosis