Which of the following are never sink regions for the
pressure-flow translocation of organic compounds?
a. growing leaves
b. seeds
c. fruits
d. roots
e. mature photosynthesizing leaves
Answer: e
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How can we explain that water is a solvent?
A. Water is a heavy substance, and as such can disrupt pre-existing bonds. B. Water is highly cohesive and adhesive, which allows it to bind to different substances as a solvent. C. Water has a polar nature, and as such its polar molecules will bind to substances that have positive or negative charges. D. Water is very dense in its liquid state, which allows it to bind to different substances as a solvent.
Messenger RNAs containing premature stop codons are destroyed by the mechanism of
A) nonstop decay. B) directed RNase activity. C) nonsense-mediated decay. D) error-mediated repair. E) none of the above
Which of the following is true of the structure
labeled "A"? a. It is composed of tubulin subunits. b. It is composed of actin subunits. c. It is a microfilament. d. It is an intermediate filament. e. It is a major component of muscle cells
The correct sequence of events in viral multiplication is
A) Penetration, replication, maturation, adsorption, assembly, release. B) Adsorption, penetration, replication, maturation, assembly, release. C) Assembly, maturation, replication, release, penetration, adsorption. D) Adsorption, release, maturation, replication, assembly, penetration. E) Replication, penetration, maturation, assembly, absorption, release.