The amino acids in a polypeptide chain are connected by:
A) covalent bonds.
B) glycosidic bonds.
C) peptide bonds.
D) both a and c.
D) both a and c.
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Deep-sea fish with large mouths use this adaptation to:
a. take chucks of meat off of larger predators probing the deep ocean in search of food. b. threaten other competitors. c. swallow almost anything that comes their way. d. store their large teeth. e. filter-feed on plankton.
A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5M solution of glucose into the cell and then place the cell into a beaker containing 10M glucose. What effect do you expect to observe?
A. No net change in cell weight B. Water moves out of the cell C. Water moves into the cell D. Glucose moves into the cell E. Glucose moves out of the cell
Which type of molecule has the potential to perform the catalytic act of reproducing itself?
A. RNA B. proteins C. polysaccharides D. DNA
The distinguishing characteristic used to classify the algae into four kingdoms is
A) whether they are single celled or multicellular. B) their cell wall components. C) their storage products. D) their habitat. E) presence or absence of chlorophyll a.