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WorksheetsTOPIC 5 CELLULAR RESPIRATION
Total questions: 15
Worksheet time: 15mins
Which of the following statements about the electron transport chain is TRUE?
I For every NADH, 3 ATP molecules are produced
II For every FADH2, 2 ATP molecules are produced
III It occurs on the outer membrane of the mitochondria
IV Last electron of hydrogen atom is the oxygen molecule
I, II and III
I, II and IV
I, III and IV
II, III and IV
I, II, III and IV
The following reaction occurs in cells during cellular respiration. Which of the following statements are TRUE about the reaction.
I The reaction occurs in the cytoplasm of cells
II Oxygen is not required
III 2H+ are released and accepted by NAD+
IV ATP is used
V Carbon dioxide is released
I and III
II and V
III and V
I, II and IV
II, III and V
Which of the following protein complexes on the inner membrane of the mitochondrion function as a protein pump?
I NADH dehydrogenase
II Succinate dehydrogenase
III Cytochrome C reductase
IV Cytochrome C oxidase
V ATP synthase
I, II and III
I, III and IV
II, III and IV
I, III and V
II, III and V
Oxidative phosphorylation is the
addition of phosphate to ADP using energy gained by transferring electrons along a chain of carriers.
addition of phosphate to ADP using energy gained by transferring electrons between chlorophyll molecules.
addition of phosphate to glucose in the first step of glycolysis.
removal of phosphate from ATP with the release of energy for work within the cell.
transfer of phosphate from ATP to GP (PGA) in photosynthesis
The diagram summarizes the pathway of glucose breakdown. Which steps result in a net increase of ATP?
1 and 3
1 and 4
2 and 4
2 and 5
3 and 5
The diagram shows some of the reactions following glycolysis during aerobic respiration. How many carbon atoms are in each of the substances S, T and U?
S - 2
T - 5
U - 3
S - 2
T - 6
U - 4
S - 3
T - 4
U - 6
S - 3
T - 6
U - 4
S - 6
T - 3
U - 3
Which substances enter and leave a mitochondrion during aerobic respiration?
Enters: acetyl CoA
Leaves: carbon dioxide
Enters: ADP
Leaves: lactate
Enters: glucose
Leaves: reduced NAD
Enters: pyruvate
Leaves: ATP
What happens to most of the reduced NAD molecules in cell metabolism?
They act as oxidising agents in glycolysis.
They are oxidised in mitachondrial ATP formation.
They are oxidised in the Calvin Cycle.
They combine with succinic acid as part of the Krebs cycle.
What will become of all the carbons from the glucose molecule after it is completely oxidised?
Pyruvate
Carbohydrate
Carbon dioxide
Acetyl-Coenzyme
Which of the following statement is TRUE in Krebs Cycle?
Acetyl CoA combines with malate to form citrate
Succinate is oxidised to fumarate
Isocitrate is reduced to form α-ketoglutarate
Malate is reduced to form oxaloacetate and NAD+ is reduced to NADH
The sequence of carboxylic acids that are formed in the Krebs cycle is
Oxaloacetate -> Citrate -> α-ketoglutarate -> Succinate -> Fumarate -> Malate
Oxaloacetate -> Citrate -> α-ketoglutarate -> Succinate -> Malate -> Fumarate
Oxaloacetate -> Citrate -> Fumarate -> Succinate -> Malate -> α-ketoglutarate
Oxaloacetate -> Citrate -> Succinate -> α-ketoglutarate -> Malate -> Fumarate
Which of the following substances are found in the mitochondrion during aerobic respiration?
Glucose, malate, oxygen, ADP
Pyruvate, malate, ADP
Glyceraldehyde-3-phoshate, oxygen, phosphate, NADH
PEP, Acetyl-coA, ATP
The diagram below illustrates the main stages of aerobic respiration in a cell. Which of the following are substances J, K, and L?
J: Glycerate phosphate
K: Oxaloacetate
L: ATP
J: NADH
K: Acetyl-CoA
L: FADH2
J: Pyruvate
K: Citrate
L: NADH
J: Pyruvate
K: Acetyl-CoA
L: ATP
Below are four reactions in Krebs cycle. Which of the following reactions involves a substrate-level phosphorylation?
Fumarate -> Malate
Succinyl CoA -> Succinate
α-ketoglutarate -> Succinyl CoA
Citrate -> α-ketoglutarate
The total number of ATP molecules yielded during the complete oxidation of one molecule of glucose to carbon and water is 38. How many molecules of ATP would be yielded if cyanide is added to the oxidation process?
2 ATP
9 ATP
30 ATP
32 ATP
