Question

why is glycolysis described as having an energy investment phase and an energy payoff phase?
early steps consume energy from atp and nadh, and later steps store an increased amount of energy in atp and nadh.
early steps consume energy from nadh, and later steps store an increased amount of energy in atp and nadh.
early steps consume energy from atp, and later steps store an increased amount of energy in atp and nadh.
early steps consume energy from atp and nadh, and later steps store an equal amount of energy in atp and nad+.
early steps consume energy from atp and nadh, and later steps store an increased amount of energy in atp.

Explanation:

Glycolysis has two phases. In the energy - investment phase, ATP is consumed (not NADH). In the energy - payoff phase, ATP is produced (net gain) and NADH is formed.

Answer:

C. Early steps consume energy from ATP, and later steps store an increased amount of energy in ATP and NADH.