Find the following A) Microtubules are formed from the tubulin heterodimer, whic

Question

Find the following

A) Microtubules are formed from the tubulin heterodimer, which is composed of the nucleotide-binding _____________ protein

A. a-tubulin

B. d-tubulin

C. dynein

D. None of these

E. ?-tubulin


B) A cellular phenomenon called _________ is a process in which cells produce small RNAs that bind to specific mRNAs and inhibit the translation of these mRNAs into proteins.

A. cRNAs

B. RNAa

C. RNA interference

D. RNAi and RNA interference

E. RNAi

C) What evidence suggests that the outer mitochondrial membrane has evolved from the outer membrane that is present as part of the cell wall of certain bacteria?

1) the presence of porins in both membranes
2) the virtual absence of cholesterol from both membranes
3) both membranes being rich in cardiolipin
4) both membranes being rich in diphosphatidylglycerol

D)In what ways can pyruvate and NADH be metabolized?

A. anaerobic processing using Krebs cycle, fermentation

B. aerobic processing using Krebs cycle, hydrolysis of PGAL

C. aerobic processes using Krebs cycle, fermentation

D. condensation of PGAL and fermentation

E. fermentation, hydrolysis of PGAL

E)You use a nonionic detergent to extract a cell. When you do, much of the mRNA stays behind with the cytoskeleton, which is not solubilized by this treatment. What do these results mean?

A. The cytoskeleton denatures in nonionic detergents.

B. The cytoplasm is anchored to the mRNA.

C. The cytoskeleton is destabilized by the nonionic detergent.

D. The mRNA is solubilized by the nonionic detergents.

E. The mRNA is anchored to the cytoskeleton.

Explanation / Answer

A) ans. B. d-tubulin B) ans C. RNA interference C) ans. 1) the presence of porins in both membranes D) ans B. aerobic processing using Krebs cycle, hydrolysis of PGAL E) ans E. The mRNA is anchored to the cytoskeleton.

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