Question

Which of the following is NOT true of glycolysis?

a. This process does not require oxygen
b. ADP is phosphorylated via substrate Level Phosphorylation in this process
c. This process requires 2 molecules of ATP to start catabolizing 1 molecule of glucose
d. This process converts a 6C atom containing compound to form two 3 C atom containing compounds
e. This process produces 2 molecules of NAD+ starting from 2 molecules of NADH

Answer 1

The incorrect statement about glycolysis is option (e), which claims that glycolysis produces 2 molecules of NAD+ from 2 molecules of NADH. Actually, it starts with NAD+ which gets reduced to NADH.

Step-by-step explanation:

Glycolysis is a crucial process in cellular respiration where one glucose molecule is converted into two pyruvate molecules. It is an anaerobic process, meaning it does not require oxygen to proceed. This pathway begins by investing 2 ATP molecules to phosphorylate glucose, which is then split into two three-carbon sugars that are further processed into two pyruvate molecules, yielding a net gain of 2 ATP through substrate-level phosphorylation and 2 NADH molecules.

The incorrect statement among the options provided is option (e), which suggests that the process produces 2 molecules of NAD+ starting from 2 molecules of NADH. In reality, glycolysis starts with 2 molecules of NAD+ which get reduced to 2 molecules of NADH during the phosphorylation process that occurs when transforming glyceraldehyde-3-phosphate into 1,3-bisphosphoglycerate.

Answer 2

e. This process produces 2 molecules of NAD+ starting from 2 molecules of NADH

Step-by-step explanation:

Glycolysis or EMP pathway is first stage of cellular respiration. It takes place in the cytoplasm of the cell. During glycolysis one 6 carbon glucose is converted into two molecules of 3 carbon pyruvic acid or pyruvate. This conversion does not require oxygen and in the process there is net gain of 2ATP. Along with ATPs, in the process of glycolysis, 2 electron carrying molecules NADH are produced from NAD⁺. Thus, option e. is not true.