Caenorhabditis elegans is extremely useful as an experimental model system due to all of the following EXCEPT ________
A) adults contain a small, fixed number of cells
B) it is highly variable in size and shape making it good for evo-devo studies
C) its genetics are well known
D) its genome has been sequenced
Answer: B
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Hydrophobic messengers include which of the following?
A) retinoids B) cAMP C) pertussis toxin D) calcium ions E) ryanodine
In transcription,
a. several proteins can made from the same DNA molecule. b. promoters are at the beginning of a gene. c. messenger RNA is produced. d. a specific enzyme called RNA polymerase is required. e. all of these are true.
A high concentration of H+ in the thylakoid compartment provides potential energy for the ____ by ____
a. breakdown of water; oxidation b. production of ATP; ATP synthases c. reduction of NADP+; an electron transfer chain d. production of sugars; the light-independent reactions e. production of O2; photolysis
After the phosphate bonds are broken in ATP in the Calvin cycle, what happens to the ADP?
A. It is recycled back to the light-dependent reactions. B. It evaporates from the cell. C. It breaks down further into AMP plus phosphate. D. It is used in cellular respiration. E. It is re-used again in the Calvin cycle, losing another phosphate.