While they are simple relative to cells, viruses often have a very diverse collection of components. Which one of the following choices is LEAST likely to be found as part of a virus?

A. proteins with functional binding sites
B. glycoproteins
C. single-stranded DNA
D. ribosomes
E. membrane components


Answer: D

Biology & Microbiology

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The presence of an extra X chromosome is more likely to result in a viable human fetus than an extra copy of an autosome because:

A. expression of genes from the X chromosome is restricted to early development of females. B. the X chromosome carries few genes, so dosage is not a problem. C. the X and the Y chromosomes do not recombine along most of their length. D. the X chromosome is the "female" chromosome. E. None of the above F. All of the above

Biology & Microbiology

Which organ of the gastrointestinal tract has a large commensal population of microorganisms?

A. Large intestine B. Small intestine C. Pancreas D. Liver E. Salivary glands

Biology & Microbiology

Refer to Figure 51-3. The allantois is identified by number:


a. 1.
b. 2.
c. 3.
d. 4.
e. 5.

Biology & Microbiology

For a linear probability model all of the following are true except for which condition?

A. You can conduct causal analysis. B. You can calculate marginal effects of control variables. C. You can conduct hypothesis testing. D. The outcome can take a large range of values.

Biology & Microbiology