If and enzyme reaction is started with 100 mM Dihydrozyacetone phosphate and at equilibrium the product Glyceraldehyde 3-Phosphate formed was 80 mM. What is the Keq for this enzyme reaction?
a. 1.25
b. 0.8
c. 80%
d. 4
e. 8
Answer: d. 4
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In the last 20 years one concern of scientists who study amphibians is that
A. genetic diversity is being increased too rapidly for proper maintenance. B. the edge effects are causing declines in species numbers. C. DDT is affecting reproduction by thinning the egg membranes. D. populations are diversifying rapidly and speciation is occurring. E. many species are declining or have gone extinct in recent years.
Carbon dioxide can be released into the atmosphere by all of the following EXCEPT:
a) volcanic eruptions b) photosynthesis c) cellular respiration d) burning of fossil fuels
The sequence of subunits in the DNA "backbone" is
A) -phosphate-sugar-phosphate-sugar-phosphate-sugar-. B) -base-sugar-phosphate-base-sugar-phosphate-. C) -sugar-base-sugar-base-sugar-base-sugar-base-. D) -base-phosphate-sugar-base-phosphate-sugar-. E) -base-phosphate-base-phosphate-base-phosphate-.
How do evolutionary biologists view the notion of biological "progress"?
A. Evolution proceeds toward a goal (teleology). B. Lasting evolutionary progress does not occur because of cyclical phenomena, such as iterative mass extinctions. C. Progress can be measured by levels of hierarchical organization among individuals of the same species. D. Objective definitions of progress are fraught with difficulty, as the processes that drive evolution have no mechanism for foresight. E. Progress can be measured by how much a given species resembles Homo sapiens.