In rapidly dividing cells, expression of BRCA1 and BRCA2 genes is the highest during the ____
a. mitosis to cytokinesis transition
b. G1/S transition and into S phase
c. G2/mitosis transition
d. S/G2 transition
e. metaphase to anaphase transition
b
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Which of the following is a way that antibodies fight infection?
a. They reduce the inflammation response to prevent the body from overheating. b. They engulf and kill pathogens through phagocytosis. c. They bind to pathogens and interfere with the pathogen’s ability to infect or bind to other cells. d. They stimulate a passive response to the presence of a pathogen.
Which of the following gases was not present in the Earth's early atmosphere but appeared after the
evolution of certain organisms? a. hydrogen b. methane c. nitrogen d. oxygen e. carbon dioxide
In the host-parasite relationship, it is advantageous for the parasite to disable and kill its host as quickly as possible.
Answer the following statement true (T) or false (F)
Photorespiration
A. requires CO2. B. occurs in C4 plants. C. uses the enzyme PEP carboxylase rather than rubisco to produce 3-phosphoglycerate. D. uses a 3-carbon sugar precursor to produce oxygen. E. tends to occur under dry and hot conditions.