Which of the following microorganisms are considered obligate intracellular pathogens?
A) chlamydias, rickettsias, Mycobacterium leprae, and Treponema pallidum
B) Mycobacterium leprae and Treponema pallidum
C) Mycobacterium tuberculosis and viruses
D) rickettsias, chlamydias, and viruses
D) rickettsias, chlamydias, and viruses
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In the cells of some organisms, mitosis occurs without cytokinesis. This results in _____
A) cells with more than one nucleus B) cells that are unusually small C) cells lacking nuclei D) destruction of chromosomes E) cell cycles lacking an S phase
An electrochemical gradient arises from an ions combined
a. concentration gradient and electrical charge b. protein pumps and electrical charge c. concentration gradient transporters
Essential fatty acids must be obtained from the diet
a. true b. false
The TCA cycle generates all of the following from each acetyl-CoA molecule oxidized except ________.
A. one FADH2 molecule B. two CO2 molecules C. three NADH molecules D. two ATP or GTP molecules