The synthesis of sugar molecules through the process of photosynthesis requires energy absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?
A. exergonic
B. endergonic
C. catabolic
D. feedback
B
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Because of the low penetration power of electrons, samples for transmission electron microscopy must be extremely thin. A(n) ________ is able to cut sections as thin as 20 nm.
Fill in the blank(s) with the appropriate word(s).
Osmolarity is the outcome of the
a. total solute plus solvent concentration in a solution. b. total solvent concentration in a solution. c. ratio of solvent to solute in a solution. d. total solute concentration in a solution. e. ratio of solute to solvent in a solution.
What statement about biochemical pathways is correct?
A) All enzymes in the pathway catalyze the same reaction. B) If an enzyme in a pathway is inactive, adding excessive amounts of its substrate will restore the normal phenotype. C) If an enzyme in a pathway is inactive, adding excessive amounts of its product will restore the normal phenotype. D) If the enzyme that catalyzes the final step in a pathway is inactive, all the other enzymes will be inactivated as well. E) If the first enzyme in a pathway is inactivated, adding the final product will not restore the normal phenotype.
Feedback inhibition is an example of:
a. translational control. b. transcriptional control. c. posttranslational control. d. a repressible system. e. constitutive control