What component of amino acid structure varies among different amino acids?
A) the long carbon-hydrogen tails of the molecule
B) the presence of a central C atom
C) the components of the R-group
D) the glycerol molecule that forms the backbone of the amino acid
Answer: C
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Dietary treatment of galactosemia ____
a. need not begin until one or two months after birth b. consists of very low protein intake c. can usually be discontinued by the age of twelve d. completely eliminates symptoms of the disease e. should be started within a few days after birth
The two primary functions of chlorophyll are to ____________________
a. absorb light and reflect light b. absorb light and transfer energy to other compounds c. reflect light and transfer energy to other compounds d. absorb light and eliminate excess water
The _______ skeleton contains the bones of the skull, vertebrae, and ribs.
a. thoracic b. appendicular c. axial d. ossicle
Once inside the human body, HIV primarily infects
a. liver tissue. b. kidney tissue. c. red blood cells. d. white blood cells. e. all of these.