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
You might also like to view...
Which of the following pigments is found exclusively in red algae?
A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene
Turgor is most directly related to the plant cells'
A. total water potential. B. pressure potential. C. solute potential. D. osmosis. E. gravity potential.
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.
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).