Kreb's Cycle Process

What is the first step of the Kreb's cycle process?

• Conversion of isocitrate to citrate

• Formation of succinyl-CoA

• Oxidation of alpha-ketoglutarate

• Conversion of citrate to isocitrate

Which molecule enters the Kreb's cycle after being converted to acetyl-CoA?

• Pyruvate

• Glucose

• ATP

• Lactic acid

How many ATP molecules are produced directly in the Kreb's cycle?

• 4

• 6

• 8

• 2

What is the final product of the Kreb's cycle?

• Glucose

• Carbon dioxide

• Water

• ATP

Which enzyme is responsible for the conversion of citrate to isocitrate in the Kreb's cycle?

• Decarboxylase

• Aconitase

• Dehydrogenase

• Isomerase

Where does the Kreb's cycle take place in eukaryotic cells?

• endoplasmic reticulum

• nucleus

• cytoplasm

• mitochondria

What is the purpose of the Kreb's cycle in cellular respiration?

• To produce oxygen

• To regulate cell division

• To generate ATP, NADH, and FADH2 through the oxidation of acetyl-CoA

• To synthesize DNA

What is the net production of NADH molecules in one turn of the Kreb's cycle?

• 7

• 1

• 3

• 5

What is the role of FADH2 in the Kreb's cycle?

• Converts NADH to NAD+

• Initiates the cycle by combining with acetyl-CoA

• Regulates the release of CO2

• Donates electrons to the electron transport chain for ATP production

What is the starting molecule for the Kreb's cycle?

• Glucose

• Acetyl-CoA

• Pyruvate

• ATP