Amino acids are linked together by peptide bonds in a ________
A. nucleic acid.
B. phospholipid.
C. polypeptide.
D. polysaccharide.
E. starch.
Answer: C
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Which of the following is most likely to have a small protein called ubiquitin attached to it?
A) a cyclin protein, that usually acts in G1, in a cell that is in G2 B) a cell surface protein that requires transport from the ER C) an mRNA leaving the nucleus to be translated D) a regulatory protein that requires sugar residues to function properly E) an mRNA produced by an egg cell that will be retained until after fertilization
If animals were unable to produce pectin, what effect would this have on their epithelial tissues?
A. It would have no effect on epithelial tissue structure or function. B. Epithelial cells would be unable to adhere to one another. C. Epithelial cells would be unable to communicate with one another. D. Epithelial cells would be unable to adhere to the extracellular matrix. E. Epithelial cells would be unable to form organized sheets of cells.
Insulin stimulates ____
a. muscle and fat cells to take up glucose b. increased levels of glucose in the blood c. a decrease in muscle cell activity d. an increase in exercise e. liver cells to release glycogen
A cell that has acquired the capacity to grow suspended in solution is
A) infected with a virus. B) immortalized. C) apoptotic. D) anchorage-independent. E) density-dependent.