Krebs Cycle

How many times does the Krebs cycle happen per glucose molecule?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS1-7

What is the first step of the Krebs cycle?

• acetyl CoA combines with the four carbon compound to create a six carbon compound

• CO2 is released from a six carbon compound to form a five carbon compound

• CO2 is released from a five carbon compound to form a four carbon compound

• A four carbon compound is transformed and ready to accept another acetyl CoA

Tags

NGSS.HS-LS1-7

What is the second major step in the Krebs cycle?

• four carbon compound is then ready to accept a new acetyl group and the cycle is repeated

• six carbon compound then undergoes decarboxylation and oxidation to form a five carbon compound

• five carbon compound undergoes decarboxylation and oxidation to form a four carbon compound

• four carbon compound then undergoes substrate-level phosphorylation and during this reaction it produces ATP

What is the third major step of the Krebs cycle?

• four carbon compound is then ready to accept a new acetyl group and the cycle is repeated

• four carbon compound then undergoes substrate-level phosphorylation and during this reaction it produces ATP

• This six carbon compound then undergoes decarboxylation and oxidation to form a five carbon compound

• The five carbon compound undergoes decarboxylation and oxidation to form a four carbon compound

What is the fourth major step of the Krebs cycle?

• four carbon compound then undergoes substrate-level phosphorylation and during this reaction it produces ATP

• The acetyl group from acetyl CoA is transferred to a four carbon compound

• The four carbon compound is then ready to accept a new acetyl group and the cycle is repeated

• The five carbon compound undergoes decarboxylation and oxidation again to form a four carbon compound

Tags

NGSS.HS-LS1-7

What happens during each major step when hydrogen is removed?

• The H+'s are rejected by FADH2 and forms FAD

• The H+'s are accepted by FAD and forms FADH2

• The H+ is accepted by NAD+ and forms NADH

• The H+ is rejected by NADH and forms NAD

Tags

NGSS.HS-LS1-7

What is meant by decarboxylation?

• adding CO2 to a carbon chain

• adding a carbon atom to a carbon chain

• removing a carbon atom from a carbon chain

• releasing CO2 from a carbon chain

What is meant by oxidation, or something becoming oxidized?

• gain of electrons from an element through the loss of oxygen or the gain of hydrogen

• loss of electrons from an element through the gain of oxygen or the loss of hydrogen

• loss of electrons from an element through the loss of oxygen or the gain of hydrogen

• gain of electrons through the gain of oxygen or the loss of hydrogen

Where in the Krebs cycle is ATP produced?

• The four carbon compound then undergoes substrate-level phosphorylation and during this reaction it produces ATP

• Oxidation also occurs twice (2 hydrogens are removed) and during this reaction it produces ATP

• This six carbon compound then undergoes decarboxylation and during this reaction it produces ATP

• The five carbon compound undergoes decarboxylation and oxidation and during this reaction it produces ATP

Tags

NGSS.HS-LS1-7

What is meant by oxidative decarboxylation in the Krebs cycle?

• carbon dioxide is produced through the removal of a carbon group

• carbon dioxide is added to carbon groups

• The addition of oxygen to carbon groups

• The removal of hydrogen from carbon groups

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5