The membrane component(s) primarily responsible for the structure and function of plasma membranes is/are
A. glycosylated proteins.
B. phospholipids.
C. glycolipids.
D. nucleic acids.
E. cholesterol.
B. phospholipids.
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Which of the following is true of an asymmetric carbon atom?
A) Only amino acids have asymmetric carbon atoms. B) A carbon with hydrogens attached at two locations is usually asymmetric. C) A carbon with hydrogens attached at three locations is usually asymmetric. D) Asymmetric carbon atoms create stereoisomers. E) Molecules may have only one asymmetric carbon atom.
The nucleotide sequence of a gene is ____
a. made from amino acids b. found in the DNA backbone c. found on both sides of the DNA molecule d. the code for the sequence of amino acids for a polypeptide e. larger than a chromosome
Which of the following is an example of direct water usage?
A) agricultural irrigation B) power plant cooling C) steam generation D) home drinking water
Which of the following viruses can establish a chronic infection of the liver which may progress to liver cancer?
A) hepatitis A B) HTLV-1 C) hepatitis C D) hepatitis D E) hepatitis E