What structures are divided during cytokinesis?
A. cytoplasm and organelles
B. cell membrane and chromatin
C. nuclei
D. cytoplasm and chromosomes
E. none of these
Answer: A
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Which of these is a property of isotopes that make it useful in cell biology?
A. they never breakdown B. they behave the same chemically C. they behave differently chemically D. the molecules they are part of break down more easily E. the molecules they are part of are more stable
Which one of the following statements about carbon is correct?
A. Each of carbon's three valence electrons shares a bond with another atom. B. Carbon-carbon single bonds allow for free rotation around the bond; carbon=carbon double bonds do not allow for free rotation around the bond. C. The spacial orientation of carbon's bonds results in carbon resting in the center of a three-dimensional structure referred to as a hexahedron. D. Carbon is not only the most abundant element on Earth; it is believed to be the most abundant element in the universe. E. Single bonds between carbon atoms are typically shorter than double bonds between carbon atoms.
Which one of the following conditions results when the transparency of the lens decreases?
A) glaucoma B) retinal detachment C) cataracts D) color blindness E) astigmatism
Which mechanisms are similar in prokaryotic and eukaryotic transcription of mRNA?
A. processing of mRNA B. recruitment of RNA polymerase to DNA C. RNA synthesis D. transcription termination