What are the two stages of pre-mRNA splicing?
What will be an ideal response?
Ans: In the first stage, the 5? end of the intron is cleaved from the upstream exon and attached to a branch site within the intron, forming a lariat structure. The second stage involves the splicing of the upstream exon to the downstream exon.
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Fatty acids can be metabolized for energy; they enter aerobic respiration ________
a. at the electron transport step as the reduced electron carriers FADH2 and NADH b. at glycolysis, but first must be converted to glucose c. at the Krebs cycle after cleavage and conversion to acetyl-CoA d. in glycolysis after enzymatic conversion to PGAL
When the air in a testing chamber is specially mixed so that its oxygen content is 10 percent and its overall air pressure is 400 mm Hg, then is _____
A) 400 mm Hg B) 82 mm Hg C) 40 mm Hg D) 4 mm Hg
Chlamydiae are incapable of producing many key metabolites, for which they must rely on their host.
Answer the following statement true (T) or false (F)
Which of the following is mismatched?
A. Gracilicutes - gram-negative cell walls B. Firmicutes - gram-positive cell walls C. Tenericutes - waxy acid fast cell walls D. Mendosicutes - archaea cell walls E. None of the choices is correct.