Glycolyse

Question 1

What is glycolysis?

Answer 1

Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process.

Question 2

True or False: Glycolysis occurs in the mitochondria.

Answer 2

False: Glycolysis occurs in the cytoplasm.

Question 3

What is the starting molecule for glycolysis?

Answer 3

The starting molecule for glycolysis is glucose.

Question 4

What are the end products of glycolysis?

Answer 4

The end products of glycolysis are pyruvate, ATP, and NADH.

Question 5

Fill in the blank: Glycolysis consists of _____ main phases.

Answer 5

two

Question 6

What are the two main phases of glycolysis?

Answer 6

The two main phases of glycolysis are the energy investment phase and the energy payoff phase.

Question 7

Multiple choice: Which enzyme catalyzes the first step of glycolysis? A) Hexokinase B) Phosphofructokinase C) Pyruvate kinase

Answer 7

A) Hexokinase

Question 8

What is the role of NAD+ in glycolysis?

Answer 8

NAD+ acts as an electron carrier and is reduced to NADH during glycolysis.

Question 9

True or False: Glycolysis requires oxygen to occur.

Answer 9

False: Glycolysis can occur in both aerobic and anaerobic conditions.

Question 10

What is the net gain of ATP molecules from one molecule of glucose during glycolysis?

Answer 10

The net gain is 2 ATP molecules.

Question 11

What is the fate of pyruvate in aerobic conditions?

Answer 11

In aerobic conditions, pyruvate is converted into acetyl-CoA and enters the Krebs cycle.

Question 12

Multiple choice: During glycolysis, glucose is phosphorylated to form: A) Glucose-6-phosphate B) Fructose-1,6-bisphosphate C) Both A and B

Answer 12

C) Both A and B

Question 13

What is the significance of phosphofructokinase in glycolysis?

Answer 13

Phosphofructokinase is a key regulatory enzyme that controls the pace of glycolysis.

Question 14

Fill in the blank: Glycolysis produces _____ molecules of NADH per glucose molecule.

Answer 14

2

Question 15

What happens to NADH produced during glycolysis under anaerobic conditions?

Answer 15

Under anaerobic conditions, NADH is oxidized back to NAD+ during fermentation.

Question 16

True or False: Glycolysis can occur in all living organisms.

Answer 16

True: Glycolysis is a universal metabolic pathway.

Question 17

What type of reaction is glycolysis primarily composed of?

Answer 17

Glycolysis is primarily composed of a series of enzyme-catalyzed reactions.

Question 18

Multiple choice: Which of the following molecules is NOT produced during glycolysis? A) ATP B) Pyruvate C) Acetyl-CoA

Answer 18

C) Acetyl-CoA

Question 19

What is the importance of the energy investment phase in glycolysis?

Answer 19

The energy investment phase requires input of ATP to phosphorylate glucose and its derivatives, preparing them for breakdown.

Question 20

Fill in the blank: The conversion of glucose to glucose-6-phosphate is catalyzed by _____ .

Answer 20

hexokinase

Question 21

What is the main purpose of glycolysis in cellular metabolism?

Answer 21

The main purpose of glycolysis is to provide energy in the form of ATP and to generate intermediates for other metabolic pathways.

Question 22

Multiple choice: How many steps are there in glycolysis? A) 5 B) 10 C) 15

Answer 22

B) 10

Question 23

True or False: Glycolysis is an anaerobic process.

Answer 23

False: Glycolysis can occur in both aerobic and anaerobic conditions.

Question 24

What happens to pyruvate in anaerobic conditions?

Answer 24

In anaerobic conditions, pyruvate is converted into lactate or ethanol depending on the organism.

Question 25

What is the role of ATP in the glycolysis pathway?

Answer 25

ATP provides the energy needed for the phosphorylation of glucose and other intermediates.