Which of the following describes a feature of amino acid structure?

A. The central or ?-carbon of the amino acid is bonded to three other groups.
B. Each amino acid will have either an ?-amino group or an ?-carboxyl group.
C. The R groups of amino acids will vary in structure, size, electrical charge, and hydrophobicity.
D. The ?-amino and ?-carboxyl groups are frequently modified by phosphorylation.
E. In most cases, the central or ?-carbon of the amino acid is bonded directly to a hydroxyl group.


C

Biology & Microbiology

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Which of the following pigments is found exclusively in red algae?

A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene

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Turgor is most directly related to the plant cells'  

A.  total water potential. B.  pressure potential. C.  solute potential. D.  osmosis. E.  gravity potential.

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Arthrosclerosis is a condition that results in a thickening of arterial walls due to buildup of fatty deposits containing

A) glycerol. B) albumin. C) phospholipids. D) glucose. E) cholesterol.

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Genes that have DNA sequences similar to functional genes but that do not appear to produce any functional product are ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology