Question

Which of the following statements regarding Entner-Doudoroff pathway is true?

a. it involves glycolysis
b. NADH is generated
c. ATP is generated
d. it involves the pentose phosphate pathway
e. NADH and ATP are generated

Answer 1

The Entner-Doudoroff pathway generates both NADH and ATP from glucose, making option e. true.

Step-by-step explanation:

The Entner-Doudoroff pathway is a metabolic pathway that converts glucose to ethanol and nets one ATP. It is an alternative to glycolysis, making option a. incorrect. NADH is generated in the Entner-Doudoroff pathway, making option b. correct. ATP is also generated, making option c. correct. The pentose phosphate pathway is separate from the Entner-Doudoroff pathway, making option d. incorrect. Therefore, the correct statement is that in the Entner-Doudoroff pathway, both NADH and ATP are generated, making option e. correct.

Answer 2

C. ATP is generated

Step-by-step explanation:

The Entner-Doudoroff pathway is one of the three glycolytic pathways that breakdown glucose into pyruvate. The Entner-Doudoroff pathway is the most common glycolytic pathway in microbes present in the soil such as Rhizobium, Azotobacter, etc.

The Entner-Doudoroff pathway forms glucose 6-phosphate from glucose which in turn is oxidized into 6-phosphogluconate. The 6-phosphogluconate finally forms pyruvate and glyceraldehyde 3-phosphate through a series of reactions. The glyceraldehyde 3-phosphate can enter the Embden-Meyerhof pathway to form one more molecule of pyruvate. During the Entner-Doudoroff pathway, one molecule of ATP and one NADPH are formed along with the formation of one molecule of each pyruvate and glyceraldehyde.