Which level of protein structure ultimately determines all the other levels of structure?
A. primary
B. secondary
C. tertiary
D. quaternary
Answer: A
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According to the cohesion-tension mechanism of water transport, ____ does not contribute to the flow of the xylem
sap?
a. hydrogen bonding between water molecules b. adhesion of water molecules to the xylem vessel walls c. evaporation of water from the leaves d. water potential in leaf cells below that of the leaf xylem e. root pressure
Why are muscle and nervous tissue not replaced by the body if damaged or lost?
What will be an ideal response?
Crustose, fruticose, and foliose are varieties of
A. lichens. B. mycorrhizae. C. rusts and smuts. D. mushrooms. E. yeasts.
______ are the only active biological agents lacking any nucleic acid (DNA or RNA).
A) Viriods B) Prions C) Satellite viruses D) Virions B) Prions How do