Overview of Glycolysis - Basics for Beginners - Biochemistry Lesson

The video tutorial explains glycolysis, focusing on glucose entry into cells, the role of hexokinase and glucokinase, and the regulation of phosphofructokinase. It covers the pathways for glucose 6-phosphate and the energy production phase, highlighting ATP and NADH generation. The tutorial also provides tips for remembering key steps and enzymes involved in glycolysis.

What is the primary role of hexokinase in glycolysis?

• To break down glucose into pyruvate

• To transport glucose into the cell

• To convert glucose into fructose

• To phosphorylate glucose

Which enzyme is responsible for converting glucose 6-phosphate into fructose 6-phosphate?

• Aldolase

• Phosphoglucose isomerase

• Phosphofructokinase 1

• Hexokinase

What is the first committed step in glycolysis?

• Conversion of pyruvate to lactate

• Breakdown of fructose 1,6-bisphosphate by aldolase

• Conversion of fructose 6-phosphate to fructose 1,6-bisphosphate

• Phosphorylation of glucose by hexokinase

What is the role of phosphofructokinase 1 in glycolysis?

• It converts pyruvate to lactate

• It converts glucose to glucose 6-phosphate

• It converts fructose 6-phosphate to fructose 1,6-bisphosphate

• It splits fructose 1,6-bisphosphate into two molecules

Which enzyme splits fructose 1,6-bisphosphate into two three-carbon molecules?

• Aldolase

• Hexokinase

• Phosphofructokinase 1

• Triose phosphate isomerase

What is the role of triose phosphate isomerase in glycolysis?

• To produce ATP from ADP

• To phosphorylate fructose 6-phosphate

• To convert dihydroxyacetone phosphate into glyceraldehyde 3-phosphate

• To convert glucose into glucose 6-phosphate

Which enzyme is responsible for the conversion of glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate?

• Phosphoglycerate kinase

• Glyceraldehyde phosphate dehydrogenase

• Pyruvate kinase

• Enolase

How many ATP molecules are net gained from one molecule of glucose during glycolysis?

• Eight

• Six

• Four

• Two

What happens to pyruvate if oxygen is not available in the cell?

• It enters the TCA cycle

• It is converted into lactate

• It is converted back to glucose

• It is stored as glycogen

Which of the following is a tip for remembering the glycolysis pathway?

• The first and last steps are regulated

• Kinases always produce ATP

• Dehydrogenases never produce NADH

• All steps are reversible