Biotin is important in gluconeogenesis for all of these reasons, ...

[kaid0807]

Biotin is important in gluconeogenesis for all of these reasons, except:
 a. It is necessary to add CO2 to certain intermediates in this pathway.
  b. CO2 becomes one or more of the 6 carbons in the glucose product.
  c. Biotin is capable of binding covalently to CO2.
  d. Biotin helps synthesize an important precursor of phosphoenolpyruvate .
  e. All of these reactions require the vitamin coenzyme.

Question 2

Thiamin diphosphate (TPP) is a coenzyme
 a. frequently encountered in oxidation-reduction reactions
  b. required for the phosphorylation of ADP
  c. involved in transfers of two-carbon groups
  d. involved in transfers of one-carbon groups

[kingfahad97]

Answer to Question 1

b

Answer to Question 2

c

[kaid0807]

Thank you!

[kingfahad97]

Always glad to help...