________ is the most common coenzyme involved in energy metabolism
Fill in the blank with correct word.
Answer: NAD+/NADH
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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.
The preassembled carbohydrate tree is added on_____ residue
Fill in the blank(s) with the appropriate word(s).
Where does the mass of the tree come from?
A. Soil B. Sunlight C. Air D. Water
Which of the following describes a prezygotic barrier that could contribute to reproductive isolation?
a. A male moth lacks the specific sensory receptors for a pheromone produced by a female moth. b. Two grass varieties possess different mutant recessive alleles and offspring resulting from backcrossing with hybrids express more detrimental recessive traits. c. The offspring of crosses between lions and tigers cannot produce offspring themselves. d. Different salamander subspecies of a single genus produce offspring with each other, but these have shorter life spans than offspring of two parents within the same subspecies. e. None of the listed responses describe a postzygotic barrier.