Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the
other 8 are small. What does this tell you about this protein's structure?
a. It is an example of a protein having quaternary structure.
b. The protein has tertiary structure and domains but no quaternary structure.
c. The primary sequence of all 16 subunits is identical, which is a unique property of
enzymes participating in photosynthesis.
d. The subunits each have 8 alpha helices in order to bind to CO2 and RuBP.
e. It's an enzyme that is extremely resistant to denaturation.
A
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The base analog 5-bromouracil can tautomerize. One tautomer behaves like thymine and the other behaves like cytosine. If 5-bromouracil is used as a mutagen, what is the minimum number of times replication must occur to mutate the codon for proline (CCC) into the codon for serine (TCC)?
A) one generation B) two generations C) three generations D) 5-bromouracil cannot induce this mutation
Does this experiment support the conclusion that prairie dogs are a keystone species?
a. Yes, because once they recovered other populations declined. b. Yes, because they tracked the recovery of grasses and forbs. c. Yes, because once prairie dogs recovered other population levels tracked their recovery. d. No, the experiment refutes the conclusion that prairie dogs are a keystone species.
Hydrophobic molecules are __________ water
a. attracted to b. absorbed by c. repelled by d. dissolved by e. polarized by
In aquatic ecosystems, primary productivity is most dependent on
A) species richness and diversity B) the type of soil C) the rate of photosynthesis D) organic nutrients E) inorganic nutrients