A Rossmann fold most likely is created when:
A. the ?-?-? motif is repeated within a polypeptide.
B. the Greek key motif is repeated within a polypeptide.
C. an ? helix facilitates the creation of a ?-?-? barrel structure.
D. an ? helix prevents the creation of a ?-?-? barrel structure.
E. a dimer contains subunits that are mirror images.
D
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In what ways are oxidative phosphorylation and photophosphorylation similar?
A. The source of energy is highly reduced organic compounds B. Proton motive force is generated C. ATP synthase enzyme phosphorylates ADP to make ATP D. An electron transport chain is used E. Water is split to provide electrons
An ecologist that studies groups of populations that occur together in one area is a(n)______
a. behavioral ecologist d. ecosystem ecologist b. population ecologist e. organismal ecologist c. community ecologist
The copulatory organ of the earthworm is the
a. penis. b. clitellum. c. gonopodium. d. vestibule.
Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues but lacks organs; has no head, body cavity, or segmentation; and has radial symmetry. To what phylum does this animal belong?
A) Cnidaria B) Mollusca C) Annelida D) Platyhelminthes E) Porifera