Glucose-6-phosphate has two main \"fates\" -- it can be processed by glycolysis

Question

Glucose-6-phosphate has two main "fates" -- it can be processed by glycolysis or it can be used in the pentose phosphate pathway. The text calls the various conditions -- conditions that describe the relative importance of these two fates -- "modes" (four different metabolic situations).

What is FALSE (note: false) about the fate of glucose-6-phosphate in these four modes?

The first stage in triacylglycerol catabolism is called "mobilization" (see section 27.1).

What is FALSE about mobilization of triacylglycerols?

Your text describes three stages in fatty acid catabolism. The second of these is "activation" -- the synthesis of acylCoA (or fatty-acylCoA) molecules from HSCoA and free fatty acids. What is TRUE about fatty acid activation?

A. PPi released from ATP in synthesis of an acyl-CoA is hydrolyzed to 2 Pi, to make the acylCoA synthesis irreversible.

B. AcylCoA synthesis does not require the expenditure of energy (in the form of ATP hydrolysis, for instance)

C. A fatty acid is joined to HSCoA in a phosphoanhydride linkage.

D. This step (activation) is optional in fatty acid catabolism; it's not strictly necesarry for breakdown of a fatty acid.

Explanation / Answer

In the systhesis of acyl-CoA , it is hydrolyzed to 2 Pi, to make the acylCoA synthesis irreversible.

Therefore, option A. is correct.

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