Glycolysis Pathway Overview
How many ATP molecules are invested during the glycolysis investment phase?
2 ATP molecules
True or False: Enzymes are used up after they finish a reaction.
False. Enzymes can be used again.
During which phase of glycolysis is ATP used?
The ATP investment phase
How many NADH molecules are produced during glycolysis?
2 NADH
Which organ uses glucose as its main source of energy?
What is the main purpose of glycolysis?
To break down glucose and produce ATP
What is the molecule called that an enzyme acts on?
The substrate
What is the most important difference between ATP investment phase and ATP payoff phase?
ATP investment phase uses ATP and ATP payoff phase produces ATP instead
True or False: NADH is produced during the ATP investment phase of glycolysis.
False, NADH is produced during the ATP payoff phase.
What’s the importance of glycolysis during exercise?
Glycolysis releases ATP to help maintain muscle energy when oxygen can't deliver it as fast.
Why is glycolysis considered the first stage of cellular respiration?
It is the first process that breaks down glucose into two pyruvate molecules
Which enzyme catalyzes the committed step of glycolysis?
Phosphofructokinase-1 or PFK-1
How many ATP molecules are produced during the ATP payoff phase of glycolysis?
4 ATP molecules
NADH is an __________ carrier that transports high-energy electrons.
Electron
Why does glycolysis speed up during intense exercise?
Cells rely on anaerobic glycolysis for quick energy.
Glycolysis has a step known as the “committed step” which one is it and what is its purpose?
Fructose-6-phosphate becoming fructose-1,6-bisphosphate and the purpose is for the glucose molecule to continue glycolysis.
Which enzyme converts glucose into glucose-6-phosphate?
Hexokinase
Glycolysis has two main phases: the ATP investment phase and the ATP ________ phase.
Payoff
What enzyme catalyzes the reaction that generates NADH in glycolysis?
Glyceraldehyde-3-phosphate dehydrogenase
What hormone does the pancreas release after a carb rich meal to start glycolysis?
What are the three main products of glycolysis from one glucose molecule?
2 pyruvate, 2 NADH, and a net gain of 2 ATP
What final enzyme in glycolysis releases pyruvate and ATP?
Pyruvate kinase
What other energy molecule is released during glycolysis other than ATP?
NADH
What molecule must accept electrons and a hydrogen ion to become NADH?
NAD+
What hormone is excreted during exercise that speeds up glycolysis for quick energy?
Adrenaline