Overview of Metabolism [Part 1] | Glycolysis, β-oxidation, Glycogen Metabolism, & Lactose Metabolism

The video provides an overview of glycolysis, detailing its preparatory and payoff phases, and the role of enzymes like hexokinase and phosphofructokinase. It explains the net ATP and NADH yield from glycolysis and introduces the concept of beta oxidation of fatty acids, highlighting the production of acetyl CoA, NADH, and FADH2. The video also covers glycerol metabolism and its integration into glycolysis, as well as glycogen and lactose metabolism, emphasizing the role of allosteric regulation in these processes.

What is the primary role of hexokinase in the preparatory phase of glycolysis?

• To convert glucose to glucose 6-phosphate using ATP

• To convert pyruvate to acetyl CoA

• To split fructose 1,6-bisphosphate into two 3-carbon molecules

• To generate ATP from ADP

Which enzyme is more strongly regulated in glycolysis?

• Hexokinase

• Phosphofructokinase

• Triosephosphate isomerase

• Pyruvate kinase

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

• 6 ATP

• 2 ATP

• 4 ATP

• 0 ATP

During the payoff phase of glycolysis, what is produced alongside ATP?

• Acetyl CoA

• FADH2

• NADH

• Lactate

What is the end product of beta oxidation of a fatty acid?

• Pyruvate

• Acetyl CoA

• Lactate

• Glucose

How many acetyl CoA molecules are produced from a 16-carbon fatty acid through beta oxidation?

• 4

• 8

• 16

• 2

What is the role of glycerol kinase in glycerol metabolism?

• To oxidize glycerol to pyruvate

• To convert glycerol to glucose

• To phosphorylate glycerol using ATP

• To convert glycerol to fatty acids

Which enzyme is responsible for converting glucose 1-phosphate to UDP glucose in glycogen synthesis?

• Glycogen synthase

• Phosphoglucomutase

• Glucose 1-phosphate UTP uridyl transferase

• Glycogen phosphorylase

What is the function of lactase in lactose metabolism?

• To phosphorylate lactose

• To convert lactose to pyruvate

• To break down lactose into glucose and galactose

• To synthesize lactose from glucose

What triggers the production of alpha lactalbumin in women?

• High levels of glucose

• Consumption of dairy products

• Childbirth and breastfeeding

• Presence of lactose in the diet