Processes that regulate cell division in mammals include:
A. rapid production of cyclin proteins that
activate CDK enzymes.
B. activated cyclin-CDK complexes trigger
cell cycle events.
C. different cyclins and CDKs act at different
stages of the cell cycle to promote cell
division.
D. rapid degradation of cyclins after CDK
activation.
E. All of these choices are correct.
E
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What would likely result from a mutation in the promoter for lac operon structural genes that increased the number of RNA polymerase molecules that bind to the DNA?
_____ Polycistronic mRNA production would increase. _____ LacI protein production would increase. _____ Lactose would be metabolized much faster. _____ Lactose would be metabolized much slower. _____ Repression at the lacO site would not be reduced but expression would increase regardless.
The cell body of the second neuron of the parasympathetic division is located outside of the CNS
Indicate whether the statement is true or false.
Using the Linnaean system of nomenclature, corn is named Zea mays. What is the specific epithet in this name?
a. Zea mays b. Zea c. mays d. Quercus e. corn
When we speculate about the origin of life from inorganic material it seems logical that several events or steps were necessary. Which of the following is not a part of these ideas?
A. Organic molecules must first be formed from inorganic molecules. B. Basic organic molecules form RNA that can serve as the genetic material and catalyze other reactions. C. RNA becomes self-replicating. D. The inorganic molecules must be collected together and segregated from other molecules by a membrane.