In a structural model of a molecule, a carbon atom may be represented by a ________
a. blue sphere only
b. letter C or corner with no symbol
c. corner with no printed symbol only
d. black sphere only
b
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In the figure above, which number represents the point in the cell cycle during which the chromosomes are replicated?
A) I B) II C) III D) IV E) V
In bacterial synthesis of polysaccharides, such as starch and glycogen, glucose is donated to the end of the growing chain by ADP-glucose. A similar reaction occurs in bacterial branching of phospholipids when phosphatidic acid is attached to a ________.
A. dihydroxyacetone phosphate B. fatty acyl-ATP C. acetyl-CoA D. cytidine diphosphate carrier
Salmon are able to live in both fresh water and salt water. Salmon are therefore:
A. conformers. B. regulators. C. conditioned. D. effectors.
Keratins, neurofilaments, and vimentins are all categories of intermediate filaments. Which of the following properties is not true of these types of intermediate filaments?
(a) They strengthen cells against mechanical stress. (b) Dimers associate by noncovalent bonding to form a tetramer. (c) They are found in the cytoplasm. (d) Phosphorylation causes disassembly during every mitotic cycle.