1. Which of the following groups of allosteric effectorsare all sensors of an energy poor status in the cell?
Group of answer choices
a.cAMP, CoASH, ADP
b.ATP, NADH, acetyl CoA
2. Which one of the following statements aboutgluconeogenesis in mammals is false?
a.It consists entirely of the reactions of glycolysis, operatingin the reverse direction.
b.It requires metabolic energy (ATP or GTP).
c. It can use amino acids as starting material.
d. The pathway includes the liver enzymeglucose-6-phosphatase.
3. Which of the following is true of mammalian glycogensynthase?
It catalyzes addition of (α1 ⟶⟶ 4) linked glucose residues tothe nonreducing end of a glycogen chain.
PKA activation of glycogen synthase requires phosphorylation ofone or more amino acids.
The enzyme binds F2,6 bisphosphate (F26BP).
cAMP is an allosteric effector that binds and inhibits glycogensynthase.
c.AMP, NAD+, CoASH
d. Acetyl CoA, AMP, NAD+
4. If a cell is actively fluxing only phases I(oxidative) and II (isomerase) of the pentose phosphate pathway,which of the following statement most accurately describes thephysiological status of the cell from the informationgiven?
The cell is in an energy-poor status.
The cell is at the point in its cell cycle where DNA replicationis highest.
The cell is under oxidative stress and needs high level ofglucose.
The cell is producing heat through uncoupled electron flow.
5.
Which of the following is true about F26BP(fructose-2,6bisphosphate)?
Its level is regulated by glucagon in the mammalian liver.
It is synthesized and broken down by a bifunctional enzyme.
It is not an intermediate in any metabolic pathway.
All statements about F26BP are true.
