Electron microscopy has greater ________ than light microscopy, because the wavelengths of visible light are much larger than the wavelengths of electrons
A) contrast
B) magnification
C) resolution
D) penetration
Answer: C
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The retinoblastoma protein (pRB), like p53, serves as a(n) ________ in regulating the cell cycle
A) up regulator B) tumor suppressor C) tumor enhancer D) oncogene E) pseudooncogene
Which of the following describes the events of apoptosis?
A) The cell dies, it is lysed, its organelles are phagocytized, and its contents are recycled. B) The cell's DNA and organelles become fragmented, the cell dies, and it is phagocytized. C) The cell's DNA and organelles become fragmented, the cell shrinks and forms blebs, and the cell's parts are packaged in vesicles that are digested by specialized cells. D) The cell's nucleus and organelles are lysed, then the cell enlarges and bursts.
Organic compounds are distinguished by molecules that contain ________ bonded to other elements.
A. nitrogen B. hydrogen C. oxygen D. carbon
Cells can be described as having a cytoskeleton of internal structures that contribute to the shape, organization, and movement of the cell. All of the following are part of the cytoskeleton except
a. the nuclear envelope. b. microtubules. c. microfilaments. d. intermediate filaments. e. actin.