Steps 7 and 10 of glycolysis result in substrate-level phosphorylation. Which of the following best describes this process?

Steps 7 and 10 of glycolysis result in substrate-level phosphorylation. Which of the following best describes this process?

(a) ATP is being hydrolyzed to phosphorylate the substrate.
(b) The energy derived from substrate oxidation is coupled to the conversion of ADP to ATP.
(c) Two successive phosphates are transferred, first to AMP, then to ADP, finally forming ATP.
(d) The substrate is hydrolyzed using ATP as an energy source.

Answer: 

The conversion of glyceraldehyde 3-phosphate to 1,3 bisphosphoglycerate in step 6 of glycolysis generates a "high energy" phosphoanhydride bond. Which of the following best describes what happens to that bond in step 7?

The conversion of glyceraldehyde 3-phosphate to 1,3 bisphosphoglycerate in step 6 of glycolysis generates a "high energy" phosphoanhydride bond. Which of the following best describes what happens to that bond in step 7? 

(a) It is hydrolyzed to drive the formation of ATP.
(b) It is hydrolyzed to drive the formation of NADH.
(c) It is hydrolyzed to generate pyruvate.
(d) It is oxidized to CO2.

Answer: 

In step 4 of glycolysis, a six-carbon sugar (fructose 1,6-bisphosphate) is cleaved to produce two three-carbon molecules (dihydroxyacetone phosphate and glyceraldehyde 3-phosphate). Which enzyme catalyzes this reaction?

In step 4 of glycolysis, a six-carbon sugar (fructose 1,6-bisphosphate) is cleaved to produce two three-carbon molecules (dihydroxyacetone phosphate and glyceraldehyde 3-phosphate). Which enzyme catalyzes this reaction?

(a) aldolase
(b) phosphoglucose isomerase
(c) enolase
(d) triose phosphate isomerase

Answer: 

Which of the following steps or processes in aerobic respiration include the production of carbon dioxide?

Which of the following steps or processes in aerobic respiration include the production of carbon dioxide?

(a) breakdown of glycogen
(b) glycolysis
(c) conversion of pyruvate to acetyl CoA
(d) oxidative phosphorylation

Answer: 

Glycolysis generates more stored energy than it expends. What is the net number of activated carrier molecules produced in this process (number and type of molecules produced minus the number of those molecules used as input)?

Glycolysis generates more stored energy than it expends. What is the net number of activated carrier molecules produced in this process (number and type of molecules produced minus the number of those molecules used as input)?

(a) 6 ATP, 2 NADH
(b) 4 ATP, 4 NADH
(c) 2 ATP, 2 NADH
(d) 4 ATP, 2 NADH

Answer: 

The final metabolite produced by glycolysis is ___________.

The final metabolite produced by glycolysis is ___________.

(a) acetyl CoA.
(b) pyruvate.
(c) 3-phosphoglycerate.
(d) glyceraldehyde 3-phosphate.

Answer: 

Foods are broken down into simple molecular subunits for distribution and use throughout the body. Which type of simple subunits, listed below, is used preferentially as an energy source?

Foods are broken down into simple molecular subunits for distribution and use throughout the body. Which type of simple subunits, listed below, is used preferentially as an energy source?

(a) simple sugars
(b) proteins
(c) free fatty acids
(d) glycerol

Answer: