Holooly Plus Logo
Holooly Plus Logo

Question 22.8: Pathways for Pyruvate Identify the pathway that has each of ......

Pathways for Pyruvate

Identify the pathway that has each of the following characteristics:
a. In this pathway, NAD^+ is reduced to NADH + H^+.
b. The product of this pathway contains three carbon atoms.
c. NADH is the oxidizing agent in this anaerobic pathway that produces a two-carbon molecule.
d. CO_2 is a product of this aerobic pathway.

Step-by-Step
The 'Blue Check Mark' means that this solution was answered by an expert.
Learn more on how do we answer questions.
Report Answer

a. NAD^+ is used to oxidize pyruvate to acetyl CoA with the loss of one carbon atom as CO_2.
b. Pyruvate is reduced to a three-carbon molecule of lactate by lactate dehydrogenase and NADH.
c. Under anaerobic conditions, pyruvate is reduced to ethanol, a two-carbon molecule, and CO_2 by NADH.
d. Under aerobic conditions, pyruvate is oxidized to acetyl CoA and CO_2 by NAD^+.

Related Answered Questions

Question: 22.9

Glycogen Metabolism Identify each of the following as part of the reaction pathways of glycogenolysis or glycogenesis: a. Glucose-1-phosphate is converted to glucose-6-phosphate. b. Glucose-1-phosphate forms UDP-glucose. c. The pathway that is activated by insulin. ...

Verified Answer:

a. glycogenolysis b. glycogenesis c. glycogenesis
Question: 22.7

Regulation of Glycolysis How is glycolysis regulated by each of the following enzymes? a. hexokinase b. phosphofructokinase c. pyruvate kinase ...

Verified Answer:

a. High levels of glucose-6-phosphate inhibit hexo...
Question: 22.6

Reactions in Glycolysis Identify each of the following reactions as an isomerization, phosphorylation, or dehydration: a. A phosphate group is transferred to ADP to form ATP. b. 3-Phosphoglycerate is converted to 2-phosphoglycerate. c. A water molecule is removed from 2-phosphoglycerate. ...

Verified Answer:

a. phosphorylation             b. isomerization   ...
Question: 22.5

Digestion of Carbohydrates Indicate the carbohydrate that undergoes digestion in each of the following sites: a. mouth b. stomach c. small intestine ...

Verified Answer:

a. starches amylose and amylopectin (α(1→4)-glycos...
Question: 22.4

Coenzymes Describe the reactive part of each of the following coenzymes and the way each participates in metabolic pathways: a. FAD b. NAD^+ ...

Verified Answer:

a. The oxidized form of FAD undergoes reduction wh...
Question: 22.3

ATP and Energy The reaction of glutamate (Glu) with ammonia (NH3) produces the amino acid glutamine (Gln). The reaction requires 3.4 kcal/mole. a. Is the formation of glutamine a catabolic or an anabolic reaction? b. Write the equation for the formation of glutamine (Gln), including the energy. c. ...

Verified Answer:

a. anabolic b. Glu + NH _3+3.4\text{ kcal/...
Question: 22.2

Energy from ATP Hydrolysis A person might burn 2600 kcal running a marathon (26.2 miles). If the molar mass of ATP is 507 g/mole, how many grams of ATP are hydrolyzed to provide this amount of energy? ...

Verified Answer:

STEP 1 State the given and needed quantities. STEP...
Question: 22.1

Metabolism Identify each of the following as catabolic or anabolic: a. digestion of lipids b. synthesis of lactase c. hydrolysis of sucrose d. synthesis of adenine monophosphate from adenine, ribose, and phosphate ...

Verified Answer:

a. The breakdown of large molecules involves catab...
Question: 22.CC.3

Indicate which of the processes, glycogenesis and/or glycogenolysis, involve each of the following compounds: a. glucose-1-phosphate b. UDP-glucose c. glycogen phosphorylase d. UTP ...

Verified Answer:

a. glycogenesis, glycogenolysis b. glycogenesis c....
Question: 22.CC.2

Identify the reaction(s) and compounds in glycolysis that have each of the following characteristics: a. require ATP b. convert a six-carbon compound to two three-carbon compounds c. convert ADP to ATP ...

Verified Answer:

a. The phosphorylation of glucose in reaction 1 an...