Which of the following is a function of the mitochondrion?
A. Tricarboxylic acid cycle enzyme reactions
B. ATP synthesis
C. Electron transport
D. All of the choices are correct.
Answer: D
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In a study of tadpole coloration, you noticed that certain percentage of tadpoles in a population displayed a decreased ability to shift from dark coloration at night to light coloration during the day
These individuals were studied and found to have the normal number of melanophores that produced normal amounts of melanin pigment granules. You remember reading about melanophores and pigment granule transport in cells and that it involved the cytoskeleton. You investigated the cytoskeleton and found that all three elements, including the one you suspected, are completely normal. You then decide to look at the motor proteins to see if the cause might lie with one of them. Which of the following would be your hypothesis? A. The melanophores in these tadpoles have partially or non-functional kinesin that would normally transport organelles along microtubules to the center of the cell. B. The melanophores in these tadpoles have partially or non-functional kinesin that would normally transport organelles along microfilaments to the center of the cell. C. The melanophores in these tadpoles have partially or non-functional dynein that would normally transport organelles along microtubules to the center of the cell. D. The melanophores in these tadpoles have partially or non-functional dynein that would normally transport organelles along microfilaments to the center of the cell. E. The melanophores in these tadpoles have partially or non-functional myosin that would normally transport organelles along microfilaments to the center of the cell.
Which of the following virulence factors would be found in Staphylococcus aureus?
A) Staphylokinase B) Hyaluronidase C) Streptokinase D) Collagenase
Which of the following is the MOST accurate description of Endotoxins?
A. They are lipopolysaccharides located in the outer membrane of gram-positive bacteria only B. They are lipopolysaccharides located in the outer membrane of gram-negative bacteria only C. Highly antigenic, induce antitoxins, and do form toxoids D. Many have A-B subunit structure in which A subunit is the active one and the B unit is the one that binds into the cell E. They are polypeptides secreted by certain bacteria that alter cell functions resulting in symptoms of disease
Signals from the _____excite motor neurons, resulting in action potentials in muscle fibers.
Fill in the blank(s) with the appropriate word(s).