What do polysaccharides, such as cellulose; nucleic acids, such as DNA; and proteins, such as keratin, have in common?

A) They are all amino acids.
B) They are all nonpolar.
C) They are all built of chemically linked monomers.
D) They are all lipids.
E) They are all carbohydrates.


Answer: C

Biology & Microbiology

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You have a tube of nutrient broth, in which E. coli is growing.  Upon analyzing the broth chemistry, you find:oxygen content has dropped a bit, but carbon dioxide has gone up a lot  formic, acetic, and lactic acids are present  What kind of metabolism has most likely occurred?

A. Anaerobic respiration B. Aerobic respiration C. Photosynthesis D. Fermentation

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Axons branch into axon terminals, which have ________ located at the terminal ends

A) Schwann cells B) dendrites C) nodes of Ranvier D) bulbs E) hillocks

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Each of the following structures is found within the nucleus of a eukaryotic cell except

A) transfer RNA. B) histones. C) plasmids. D) the nucleolus. E) All of these are found in the nucleus.

Biology & Microbiology