Which structure of the virus in the accompanying figure is the capsid?
a. 1
b. 2
c. 3
d. 4
e. 5
b
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In the sliding filament model of muscle contraction, I bands contain
A) thick filaments. B) thin filaments. C) myosin. D) sacrcomeres. E) both thick and thin filaments.
Water molds are
a. parasites of fish and invertebrates. b. the cause of late blight of potatoes. c. the cause of sudden oak death. d. responsible for the destruction of cucumber, squash, and other crops. e. all of these.
The characteristic of the human immunodeficiency virus (HIV) that makes it different from other RNA viruses is that it ____________.
A. can synthesize mRNA from a double-stranded DNA template. B. inserts into the DNA of the host C. causes hepatitis D. can synthesize DNA from an RNA template
Which of the following is useful in distinguishing between bacterial, archaeal and eukaryotic cells?
A. The presence of membrane-delimited organelles within the cytoplasm B. The use of DNA for the storage of genetic information C. The presence of ribosomes for the synthesis of proteins D. All of the choices are correct.