Which stage of aerobic respiration requires an input of two ATP?
A. glycolysis
B. acetyl CoA formation
C. citric acid cycle
D. electron transfer phosphorylation
E. fermentation
Answer: A
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Osmoconforming sharks take in water, as needed, _____
A) by migrating to freshwater rivers to drink fresh water B) via osmosis, as their body cells are slightly hyperosmotic to seawater C) via active transport of water across the cells on their gills D) by water diffusion from seawater, which is hyperosmotic to the fluids in their cells E) by selective transport of water molecules across the wall of the gut
The histone octamer forms a tightly packed particle, but the N-termini that protrude from the octamer are less ordered. Which is the best explanation for this observation?
A. The charges on the amino acid residues in the N-terminal tails are primarily acidic and repel each other. B. The charges on the amino acid residues in the N-terminal tails are primarily basic and flex to accommodate the DNA. C. The N-terminal tails must be flexible because they bind to and then release DNA during transcription. D. The N-terminal tails must be more flexible because they form intermolecular contacts with other nucleosomes. E. The N-terminal tails must be more flexible because they interact within the minor groove of DNA.
Glyoxysomes play an important role in the germination of fat-storing seeds and are considered to be specialized ________.
A) peroxisomes B) lysosomes C) vacuoles D) centrioles E) ribosomes
What is the best description of the blood agar media that you will be using?
A) Enriched & differential (based on hemolysis pattern) B) Selective C) Both selective & differential (based on hemolysis pattern) D) Neither selective or differential E) Enriched F) Enriched, selective, & differential (based on hemolysis pattern)