Lecture 20 - carbohydrates 2 – PoNF Study Exam Questions With Correct Answers.
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Carbohydrates 2 – PoNF
Institution
Carbohydrates 2 – PoNF
Lecture 20 - carbohydrates 2 – PoNF Study
Exam Questions With Correct Answers.
What is glycolysis? - answerthe breakdown of glucose by enzymes, releasing energy and
pyruvic acid.
Where does glycolysis occur? - answercytosol
2 phases of glycolysis - answer1. energy investment phase 2 ATP used...
Lecture 20 - carbohydrates 2 – PoNF Study
Exam Questions With Correct Answers.
What is glycolysis? - answer✔the breakdown of glucose by enzymes, releasing energy and
pyruvic acid.
Where does glycolysis occur? - answer✔cytosol
2 phases of glycolysis - answer✔1. energy investment phase 2 ATP used
2. energy payoff phase - Net 2 ATP gain (4 gained altogether)
Step 1: Glycolysis
what is formed?
Enzyme used?
ATP used?
irreversible or reversible - answer✔Glucose --> Glucose 6-phosphate (phosphorylation)
hexokinase enzyme
ATP used
IRREVERISBLE
step 2 of glycolysis
what is formed
enzyme used
ATP used?
irreversible or reversible - answer✔glucose-6-phosphate --> fructose-6-phosphate (conversion)
phosphohexase isomerase
ATP and ADP used as it is REVERSIBLE due to free energy
step 3 of glycolysis
irreversible or reversible - answer✔fructose-6-phosphate --> fructose-1,6-biphosphate
(phosphorylation)
phosphofructokinase-1 (PFK-1)
IRREVERSIBLE - first committed step of glycolysis - cannot go back after this
step 4 of glycolysis
what is formed
enzyme used
ATP used?
irreversible or reversible - answer✔cleavage of fructose-1,6-biphosphate (splitting part of
glycolysis - 1 Glc into 2 triose sugars)
fructose-1,6-biphosphate aldoase (aldoase for short)
REVERSIBLE
step 5 of glycolysis
what is formed
enzyme used
ATP used?
irreversible or reversible - answer✔interconversion of triose sugars
triose phosphate isomerase
REVERSIBLE
yields 2 G-3-P per glucose
what triose can only participate in glycolysis - answer✔glyceraldehyde-3-phosphate
step 6 of glycolysis
what is formed
enzyme used
ATP used?
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