Which of the following is NOT a characteristic of spirochetes?

A) possess an axial filament
B) gram-negative
C) helical shape
D) easily observed with brightfield microscopy
E) found in the human oral cavity


D

Biology & Microbiology

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The ability to conjugate depends on the presence of a plasmid called the ____ within the donor cell

a. X factor b. F factor c. C factor d. sex pilus e. S factor

Biology & Microbiology

If R is dominant to r, the offspring of the cross of RR with rr will ____

a. have a unique phenotype b. have the same phenotype as the RR parents c. have the same phenotype as the rr parents d. have the same genotype as the RR parents e. have the same genotype as the rr parents

Biology & Microbiology

Which of the following is determined about DNA

from X-ray diffraction data? a. DNA is uniform in diameter. b. DNA is long and narrow. c. Part of the DNA molecule repeats itself often. d. The DNA molecule is spiraled. e. All of these are determined.

Biology & Microbiology

Which statement best describes an electron transfer chain?

A. It generates energy from carbohydrates. B. It is used by cells to dispose of excess electrons. C. It utilizes ATP to synthesize nutrients. D. It transfers energy, stepwise, from one compound to another. E. It requires activation by oxygen.

Biology & Microbiology