Antibodies are
A. specific molecules, or parts of molecules, that the body recognizes as foreign
B. cells that protect the body against invaders
C. enzymes secreted to destroy a pathogen's cell wall
D. proteins the body produces against invading substances
E. proteins on the surface of our cells to which pathogens attach
Answer: D. proteins the body produces against invading substances
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Which immunoglobulin class/es can fix complement?
A. IgG only B. IgE and IgA C. IgD only D. IgM and IgG E. IgM only
What is the ?G for the inward transport of sucrose?
For a particular cell at 25°C, the concentration of sucrose is 10 mM on the inside of the cell and 0.5 mM on the outside, whereas the concentration of sodium ions (Na+) is 0.5 mM on the inside of the cell and 10 mM on the outside. The membrane potential is -150 mV. Constants: R = 1.987 cal/mol-K; T = 25°C = 298 K; F = 23,062 cal/mole-volt A) +1.774 kcal/mol; an endergonic reaction B) +1.774 kcal/mol; an exergonic reaction C) ?1.774 kcal/mol; an endergonic reaction D) ?1.774 kcal/mol; an exergonic reaction E) None of the above are correct.
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c. G2/mitosis transition
d. S/G2 transition
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