A shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture ___________.
A. fatty acids
B. DNA
C. proteins
D. cellulose
B. DNA
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Briefly describe the effect of deposition of antibody or complement on the surface of a pathogen or antigen in relation to opsonization
What will be an ideal response?
Many eukaryotes have a DNA glycosylase that specifically removes T residues from DNA when paired with G. Why is it better to repair the G-T pairing to G-C by removing the T than to remove the G and form an A-T pair?
A. G-C pairs can form three hydrogen bonds between them and are therefore stronger. B. Oxidative damage to guanine by alkylation is the most common reason for G-T pairs, so removal of the T will maintain the original G-C pair. C. T bases easily tautomerize into C bases, so removing the T will make sure the pair stays in its original form. D. G-C basepairs occur more frequently in cells. E. All of the choices provided are potential reasons.
The total solute concentration of a solution of water and other substances (salts, proteins, etc.) is referred to specifically as its
A. osmolarity. B. tonicity. C. salinity. D. specific gravity. E. density.
Which of the following is (are) true regarding gastric
bypass surgery? a. It is an unusually safe surgical procedure. b. It is known to stimulate the production of leptin. c. It may inhibit the production of ghrelin. d. It causes food to bypass the stomach and go directly to the small intestine. e. None of these are true.