What is the primary function of the citric acid cycle in metabolism?

a. to break down food molecules into smaller components so they can be absorbed by the blood

b. to synthesize atp from the energy produced in the hydrolysis of citric acid

c. to provide the enzymes necessary for the hydrolysis of carbohydrates, fats, and proteins

d. to convert acetyl groups to co2 molecules, and provide reduced coenzymes for electron transport and synthesis of atp

e. to join two-carbon acetyl groups in a cyclic series of reactions to form glucose, which can then be used for energy

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next