The most critical level of eukaryotic genetic control is ________ control.
A. translational
B. posttranslational
C. feedback
D. transcriptional
E. posttranscriptional
Answer: D
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Which of the following responses is NOT controlled
by plant hormones? a. the growth form of the plant (apical dominance) b. the beginning and ending of dormancy c. the bending of an oat coleoptile toward light d. the production of glucose by the chloroplast e. the formation of abscission zones
Three human disorders—fragile X syndrome, myotonic dystrophy, and Huntington's disease–are conceptually linked by a common mode of molecular upset. Describe the phenomena that link these disorders
What will be an ideal response?
If the concentrations of CO2 and O2 were equal in the atmosphere, rubisco would favor CO2 over O2 as a substrate by about 2000:1 at 25 °C. Why, in today's atmosphere (and at 25 °C), is the photosynthesis/photorespiration ratio of C3 plants only about 4:1?
A. O2 is much more abundant than CO2 in today's atmosphere. B. Rubiscos that are more selective for CO2 are slower. C. O2 is continually produced in the leaves of C4 plants. D. RuBP reacts readily with O2.
An absorption spectrum is a graph that shows ________
a. absorption of different wavelengths of light by a pigment b. photosynthetic activity at various wavelengths of light c. wavelengths of visible light only d. wavelengths of various forms of radiation