Which is the most important role of the G2 checkpoint?
a. Determining whether conditions are favorable for cell division to proceed
b. Checking for damage to genomic DNA
c. Determining if all the sister chromatids are correctly attached to the spindle microtubules
d. Ensuring that all the chromosomes have been replicated and that replicated DNA is not damaged
d. Ensuring that all the chromosomes have been replicated and that replicated DNA is not damaged
The most important role of the G2 checkpoint is ensuring that all the chromosomes have been replicated and that replicated DNA is not damaged.
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Glycolysis, the breakdown of glucose to two molecules of pyruvate, is an example of a reaction that is ___________
A. exergonic and catabolic B. exergonic and anabolic C. endergonic and catabolic D. endergonic and anabolic E. explosive
Match the following items with the correct phrases.
_______1. _______________ are chemical mediators that enable cells to communicate with each other. _______2. When attached to the surface of particles or cells, ____________________ can facilitate phagocytosis. _______3. Proteins produced by one bacterial species that kill other bacterial species are known as ____________________. _______4. ____________________ are small, antiviral proteins that are produced by virus-infected cells. _______5. ____________________ attract leukocytes to sites where they are needed. a. bacteriocins b. chemotactic agents c. complement fragments d. cytokines e. interferons
Hereditary material in organisms is
a. DNA b. ATP c. RNA d. chromosomes
Satellite DNA is often found in regions of
a. heterochromatin. b. simple sequence DNA. c. low crossing over frequency. d. euchromatin. e. high G-C content.