Macrophage cells undergo a process called phagocytosis in which material is brought into a cell in the form of membrane vesicles and then transported along microtubules toward the cell center. Assuming that the centrosome is near the cell center you can predict that these vesicles are moving to the ________ end of microtubules using the motor protein _________.
A. minus end; kinesin
B. plus end; kinesin
C. minus end; dynein
D. plus end; dynein
C
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Which of the following is not an adaptation of conifers to dry or cold conditions?
A. conical shape of tree B. scalelike or needle-shaped leaves C. flexible branches D. waxy cuticle E. production of resin
Schizogony
A. means multiple fissions. B. is performed by bacteria. C. is performed by protozoa. D. is a form of reproduction. E. means multiple fissions AND is performed by protozoa.
Hydrogen bonds
1.occur between non-polar molecules or groups. 2.are as strong as covalent bonds. 3.occur between polar molecules or groups. 4.never occur in water.
Bactericidal drugs tend to target bacterial
A) cell walls, cell membranes, and nucleic acids. B) protein synthesis and nucleic acids. C) nucleic acids. D) cell walls and cell membranes. E) cell walls and enzyme activation.