Cellular Respiration Revision

Phosphorylation of glucose is catalase by_________

Name the molecule shows on the diagram

Which of the following statement is NOT correct regarding to aerobic respiration?

• cells would lose too much energy as hear if oxidise glucose directly

• gradual glucose breakdown allows simultaneous buildup of many ATP

• cells are able to utilise all energy from glucose when released in one burst

• cell would lose too much energy as non-usuable heat if they used glucose directly.

Which of the following process produce ATP by substrate-level phosphorylation?

• glycolysis

• Krebs' cycle

• pyruvate oxidation

• chemiosmosis

• electron transport chain

Glycolysis bale to produce ​ (a)   molecule of ​ (b)   and net ​ (c)   molecule of ​ (d)  

• NADH
• two
• ATP
• four
• one
• FADH2
• ADP
• cAMP

Describe the pyruvate oxidation based on the information on the diagram. [5]

Answer explanation

Pyruvate transport into the matrix of mitochondrion with the help of transport proteins.

Pyruvate undergoes oxidative decarboxylation, catalysed by enzyme pyruvate dehydrogenase.

One molecule of carbon dioxide is removed.

The two carbon acetyl is undergoes oxidation by donating electron to NAD⁺ .

The NAD⁺ is reduced to NADH + H⁺.

The oxidised compund bind with coenzyme A, forming acetyl CoA.

Arrange the explanation of Krebs cycle in correct order.

• citrate undergoes isomerisation to isocitrate

• isocitrate udergoes oxidative decarboxylation to α-ketoglutarate

• α-ketoglutarate undergoes oxidative decarboxylation and binding to Coenzyme A forming succinyl CoA

• acetyl CoA add acetyl to oxaloacetate produce citrate

Describe steps shows on the diagram, about the substrate-level phosphorylation occurs at Krebs' cycle

Answer explanation

Coenzyme A is displaced by a phosphate group.

The phosphate group then transfer to GDP, forming GTP.

Enyzme catalysed the transferred of a phosphate group from GTP to ADP, forming ATP.

__________ is the enzyme responsible to generate the ATP by utilised the proton motive force.

___ is the first prosthetic group found in NADH dehydrogenase.