Glycolysis & Kreb Cycle APB

Which of the following statements describes what happens to a molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction?

• It gains electrons and gains potential energy.

• It loses electrons and loses potential energy.

• It gains electrons and loses potential energy.

• It loses electrons and gains potential energy.

Tags

NGSS.HS-PS1-7

Which kind of metabolic poison would most directly interfere with glycolysis?

• an agent that reacts with oxygen and depletes its concentration in the cell

• an agent that binds to pyruvate and inactivates it

• an agent that closely mimics the structure of glucose but is not metabolized

• an agent that reacts with NADH and oxidizes it to NAD+

Tags

NGSS.HS-LS1-7

Which of the following metabolic processes normally occurs regardless of whether or not oxygen (O2) is present?

• citric acid cycle

• glycolysis

• lactate fermentation

• oxidative phosphorylation

Tags

NGSS.HS-LS2-3

What is the oxidizing agent in the following reaction?

 

Pyruvate + NADH + H+ → Lactate + NAD+

• NADH

• NAD+

• lactate

• pyruvate

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

NGSS.HS-PS1-4

High levels of citric acid inhibit the enzyme phosphofructokinase, a key enzyme in glycolysis. Citric acid binds to the enzyme at a different location from the active site. This is an example of ________.

• allosteric regulation

• competitive inhibition

• the specificity of enzymes for their substrates

• positive feedback regulation