Individuals who are heterozygous for sicklecell
anemia have a greater resistance to
a. malaria.
b. diphtheria.
c. cholera.
d. typhoid fever.
e. all of these
A
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The maintenance of a constant environment in a cell is called __________.
A. active transport B. homeostasis C. gene expression D. translation
Which of the following has been associated with the flesh-eating organism?
A. H. lechter B. Pseudomonas aeruginosa C. Staphylococcus aureus D. Streptococcus pyogenes
The polymerase chain reaction (PCR) has advanced our understanding of systematics because it allows for ____
a. analysis of morphological traits b. analysis of small amounts of DNA from museum specimens and fossils c. the reconstruction of entire individuals from a small amount of DNA d. the reconstruction of entire individuals from a small amount of RNA e. the analysis of an entire genome from a small fossil fragment
Which of the following pairs is mismatched?
A) DNA polymerase — makes a molecule of DNA from a DNA template
B) RNA polymerase — makes a molecule of RNA from an RNA template
C) DNA ligase — joins segments of DNA
D) transposase — insertion of DNA segments into DNA
E) DNA gyrase — coils and twists DNA