Glycolyse Flashcards
(25 cards)
What is glycolysis?
Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process.
True or False: Glycolysis occurs in the mitochondria.
False: Glycolysis occurs in the cytoplasm.
What is the starting molecule for glycolysis?
The starting molecule for glycolysis is glucose.
What are the end products of glycolysis?
The end products of glycolysis are pyruvate, ATP, and NADH.
Fill in the blank: Glycolysis consists of _____ main phases.
two
What are the two main phases of glycolysis?
The two main phases of glycolysis are the energy investment phase and the energy payoff phase.
Multiple choice: Which enzyme catalyzes the first step of glycolysis? A) Hexokinase B) Phosphofructokinase C) Pyruvate kinase
A) Hexokinase
What is the role of NAD+ in glycolysis?
NAD+ acts as an electron carrier and is reduced to NADH during glycolysis.
True or False: Glycolysis requires oxygen to occur.
False: Glycolysis can occur in both aerobic and anaerobic conditions.
What is the net gain of ATP molecules from one molecule of glucose during glycolysis?
The net gain is 2 ATP molecules.
What is the fate of pyruvate in aerobic conditions?
In aerobic conditions, pyruvate is converted into acetyl-CoA and enters the Krebs cycle.
Multiple choice: During glycolysis, glucose is phosphorylated to form: A) Glucose-6-phosphate B) Fructose-1,6-bisphosphate C) Both A and B
C) Both A and B
What is the significance of phosphofructokinase in glycolysis?
Phosphofructokinase is a key regulatory enzyme that controls the pace of glycolysis.
Fill in the blank: Glycolysis produces _____ molecules of NADH per glucose molecule.
2
What happens to NADH produced during glycolysis under anaerobic conditions?
Under anaerobic conditions, NADH is oxidized back to NAD+ during fermentation.
True or False: Glycolysis can occur in all living organisms.
True: Glycolysis is a universal metabolic pathway.
What type of reaction is glycolysis primarily composed of?
Glycolysis is primarily composed of a series of enzyme-catalyzed reactions.
Multiple choice: Which of the following molecules is NOT produced during glycolysis? A) ATP B) Pyruvate C) Acetyl-CoA
C) Acetyl-CoA
What is the importance of the energy investment phase in glycolysis?
The energy investment phase requires input of ATP to phosphorylate glucose and its derivatives, preparing them for breakdown.
Fill in the blank: The conversion of glucose to glucose-6-phosphate is catalyzed by _____ .
hexokinase
What is the main purpose of glycolysis in cellular metabolism?
The main purpose of glycolysis is to provide energy in the form of ATP and to generate intermediates for other metabolic pathways.
Multiple choice: How many steps are there in glycolysis? A) 5 B) 10 C) 15
B) 10
True or False: Glycolysis is an anaerobic process.
False: Glycolysis can occur in both aerobic and anaerobic conditions.
What happens to pyruvate in anaerobic conditions?
In anaerobic conditions, pyruvate is converted into lactate or ethanol depending on the organism.
