An important anaerobic process in the degradation of some xenobiotics is
a. oxidation by oxygenases and dioxygenases.
b. cometabolism.
c. microbial leaching.
d. reductive dechlorination.
Answer: D
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When DNA replication begins, _____
a. the two DNA strands unwind from each other b. the two DNA strands condense for base transfers c. two DNA molecules bond d. old strands move to find new strands
Which statement is true?
1.A cell placed in an isotonic solution will swell. 2.A cell placed in a hypotonic solution will swell. 3.A cell placed in a hypotonic solution will shrink. 4.A cell placed in a hypertonic solution will remain the same size. 5.A cell placed in a hypotonic solution will remain the same size.
Which of the following is able to passively penetrate the plasma membrane (without a transport protein)?
O2 Small charged particles Large polar molecules All of the choices are correct.
The __________ gland produces hormones and is the site where __________ (a kind of white blood
cell) mature. Fill in the blank(s) with the appropriate word(s).