Which of the following is a typical means of halting normal cell division?
A) the shortening of telomeres B) increasing the activity of p53
C) triggering apoptosis D) activating oncogenes
Answer: A
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A dental student wants to test if fluoride is an effective additive against tooth decay. The student studies tooth decay in a population of people who live in neighborhoods supplied with fluoridated water. This student would like to ask whether access to fluoridated water prevents tooth decay. What would be an effective control group to ask this question?
A. Individuals who have fluoride added to their toothpaste but not their water. B. Individuals with access to fluoridated water. C. Individuals with access to water with no fluoride added. D. Individuals with access to differing amounts of fluoride in the water.
If there are 10,000 calories of net primary productivity in a field, how much on average will be available to a primary consumer?
A. 10,000 calories B. 10 calories C. 1 calorie D. 1,000 calories E. 100 calories
Proteins that span the membrane multiple times have multiple _______ that alternate with multiple transmembrane stop-transfer sequences.
a. glycosylation sites b. internal signal sequences c. phosphorylation sites d. sulfation sites
Explain how blood glucose is kept constant through the actions of hormones.
What will be an ideal response?