Glycolysis

Question 1

Glycolysis

Step 1?

Answer 1

• energy requiring

- required energy made when 2 ATP molecules are hydrolyzed

Question 2

Glycolysis

Step 2?

Answer 2

• 1st ATP attaches phosphate group to one end of glucose molecule
• creates glucose-6-phosphate

Question 3

Glycolysis

Step 3?

Answer 3

-glucose-6-phosphate is rearranged into fructose-6-phosphate

Question 4

Glycolysis

Step 4?

Answer 4

• 2nd ATP attaches a phosphate group to the other end of fructose-6-phosphate
• creating fructose-1, 6-bisphosphate

Question 5

Glycolysis

Step 5?

Answer 5

• backbone splits forming G3P and DHAP
• DHAP immediately changes to G3P

this marks the start of energy release

Question 6

Glycolysis

Step 6?

Answer 6

• each G3P gives up 1 hydrogen and 2 electrons to NAD+
• reducing both to NADH
• at same time G3P combines with inorganic phosphate
• creating unstable molecule 1-3 BPG

Question 7

Glycolysis

Step 7?

Answer 7

• 1-3 BPG gives up phosphate group to ADP forming ATP
• results in molecule of G3P
• 2 ATPs formed called SLP

Question 8

Glycolysis

Step 8?

Answer 8

-G3P rearranges to structurally different isomer 2PG

Question 9

Glycolysis

Step 9?

Answer 9

• 2PG gives up 1 proton and 1 hydroxide ion that combine to form water
• creating PEP

Question 10

Glycolysis

Step 10?

Answer 10

• PEP is very unstable and break downs releasing energy to transfer 1 phosphate group to ADP forming ATP
• once for each PEP

Question 11

Glycolysis

Summary?

Answer 11

• 2 NADH
• 2 ATP (net)
• 2 pyruvate for each glucose that enters the reaction

Question 12

Glycolysis
Glycolysis?
Glucose backbone?

Answer 12

• First step of cellular respiration
• process for harnessing energy
• one glucose is broken into two pyruvate molecules in cytoplasm of cell

-6 carbon with 6 oxygens and 12 hydrogens attached