The mechanism for adenosine triphosphate (ATP) production in which high-energy phosphate bonds produced by the central metabolic pathways are donated to adenosine diphosphate (ADP) to form ATP is:
a. substrate-level phosphorylation.
b. fermentative metabolism.
c. oxidative phosphorylation.
d. aerobic respiration.
A
Fermentative metabolism is one form of substrate-level phosphorylation that does not require oxygen. Oxidative phosphorylation is an electron transport system that can use either oxygen as the terminal electron acceptor (aerobic respiration) or acceptors other than oxygen (anaerobic respiration).
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Which one of the following is not a true statement about Klinefelter syndrome?
A. Affected males have small testes. B. Affected males can reproduce normally. C. Affected males tend to be tall for their age. D. Affected males have a normal penis and scrotum. E. Affected males have sparse pubic and facial hair.
In competitive inhibition an inhibitor molecule binds an enzyme at the active site
1.True 2.False
All of the following are respiratory surfaces EXCEPT for
A) tracheae of a fly. B) alveoli of dogs. C) skin of earthworms. D) air sacs of birds. E) gills of fish.
In a capsule stain, capsules can be seen as ___________ surrounding the cells.
A. Purple cells walls B. Pink cell walls C. Clear halos D. A dark background