IBS Set 3 Quiz - Respiration

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Question 1 of 49

What enzyme partakes in the reversible reaction shown by the green question mark?

Select one of the following:

Phosphoglucose isomerase
Enolase
Aldolase
Phosphofructo kinase

Explanation

Question 2 of 49

What enzyme partakes in the reversible reaction shown by the orange question mark?

Select one of the following:

Aldolase
Phosphoglucose isomerase
Phosphoglycerate kinase
Enolase

Explanation

Question 3 of 49

What enzyme partakes in the reversible reaction shown by the red question mark?

Select one of the following:

Phosphoglycerate kinase
Enolase
Aldolase
Phosphoglucose isomerase

Explanation

Question 4 of 49

What enzyme partakes in the reversible reaction shown by the purple question mark?

Select one of the following:

Enolase
Aldolase
Phosphoglucose isomerase
Phosphoglycerate kinase

Explanation

Question 5 of 49

What is the intermediate produced shown by the blue question mark?

Select one of the following:

3-Phosphoglycerate
1-Phosphoglycerate
1,3-diphosphoglycerate
Succinate

Explanation

Question 6 of 49

What is the intermediate produced shown by the gray question mark?

Select one of the following:

Phosphoenol pyruvate
1-Phosphoglycerate
3-Phosphoglycerate
Acetyl CoA

Explanation

Question 7 of 49

Define substrate level phosphorylation.

Select one of the following:

The generation of an energy rich phosphate bond resulting from the breakdown of a more energy rich substrate.
The synthesis of ATP driven by the electron transport chain.
The potential of a substance to donate its electrons.

Explanation

Question 8 of 49

Define oxidative phosphorylation

Select one of the following:

The synthesis of ATP driven by the electron transport chain.
The formation of an energy rich phosphate bond from the breakdown of a more energy rich substrate.
The potential of a substance to donate its electrons.

Explanation

Question 9 of 49

When is water produced in glycolysis?

Select one of the following:

2-Phosphoglycerate -> Phosphoenol pyruvate
Glucose -> Glucose-6-phosphate
Glyceraldehyde 3 phosphate -> 1,3-bisphosphoglycerate
Fructose-6-phosphate -> Fructose-1,6-bisphosphate

Explanation

Question 10 of 49

A kinase enzyme catalyses the removal of a phosphate group from a molecule.

Select one of the following:

True
False

Explanation

Question 11 of 49

What molecule is shown by the red question mark?

Select one of the following:

NAD+
O2
CO2
FADH

Explanation

Question 12 of 49

What molecule is shown by the green question mark?

Select one of the following:

CO2
O2
Pyruvate
FAD+

Explanation

Question 13 of 49

What molecule is shown by the purple question mark?

Select one of the following:

O2
NAD+
H2O
Lactate

Explanation

Question 14 of 49

What molecule is shown by the orange question mark?

Select one of the following:

Lactate
O2
H2O
NAD+

Explanation

Question 15 of 49

What molecule is shown by the blue question mark?

Select one of the following:

Lactate
Pyruvate
NADH
O2

Explanation

Question 16 of 49

What intermediate does the red question mark show?

Select one of the following:

Phosphoenolpyruvate
Oxaloacetate
Glyceraldehyde-3-phosphate
Dihydroxyacetone phosphate

Explanation

Question 17 of 49

What intermediate does the blue question mark show?

Select one of the following:

Phosphoenolpyruvate
Oxaloacetate
Citric acid
Fumarate

Explanation

Question 18 of 49

What enzyme does the green question mark show?

Select one of the following:

Phosphoenolpyruvate carboxykinase
Pyruvate dehydrogenase
Phosphoglucose isomerase
Phosphoglycerate mutase

Explanation

Question 19 of 49

What enzyme does the orange question mark show?

Select one of the following:

Pyruvate carboxylase
Pyruvate dehydrogenase
Pyruvate anhydrase
Pyruvate carboxykinase

Explanation

Question 20 of 49

What cycle does the diagram show?

Select one of the following:

Cori cycle
Krebs cycle
Calvin cycle

Explanation

Question 21 of 49

Where is glucose converted to lactate in this cycle?

Select one of the following:

Skeletal muscle
Liver
Kidneys
Adipose

Explanation

Question 22 of 49

Where is lactate converted to glucose in this cycle?

Select one of the following:

Skeletal muscle
Liver
Kidneys
Adipose

Explanation

Question 23 of 49

The cori cycle uses more ATP in conversion of lactate to glucose than vice versa.

Select one of the following:

True
False

Explanation

Question 24 of 49

Von Gierke's disease leads to a deficiency in the enzyme glucose-6-phosphatase. How might this impact on glycogen levels in the liver?

Select one of the following:

Glycogen levels will increase
Glycogen levels will decrease

Explanation

Question 25 of 49

Coenzyme A performs what function?

Select one of the following:

Activates acetyl groups so they can be transferred to other metabolites.
Catalyse gluconeogenesis in the liver as part of the cori cycle.
Converts Pyruvate into Acetyl CoA

Explanation

Question 26 of 49

Pyruvate dehydrogenase complex is made up of what enzymes?

Select one or more of the following:

Pyruvate dehydrogenase
Dihydrolipoyl transacetylase
Dihydrolipoyl dehydrogenase
Pyruvate carboxylase
Phosphoenolpyruvate carboxykinase

Explanation

Question 27 of 49

Vitamin B1 deficiency, sometimes known as "beri-beri" causes fatigue due to lack of pyruvate conversion into Acetyl CoA.

Select one of the following:

True
False

Explanation

Question 28 of 49

As well as pyruvate, fatty acids and amino acids can also be converted to Acetyl CoA

Select one of the following:

True
False

Explanation

Question 29 of 49

Acetyl CoA can be converted to Amino acids, explaining why a high carbohydrate diet can lead to high protein levels.

Select one of the following:

True
False

Explanation

Question 30 of 49

Electron loss during redox in the electron transport chain usually occurs when hydrogen is removed.

Select one of the following:

True
False

Explanation

Question 31 of 49

The less negative a substances redox potential, the greater the tendency to donate electrons.

Select one of the following:

True
False

Explanation

Question 32 of 49

Carriers of different redox potentials pass their electrons on to carriers with a less negative redox potential.

Select one of the following:

True
False

Explanation

Question 33 of 49

Loss of hydrogen indicates oxidation.

Select one of the following:

True
False

Explanation

Question 34 of 49

NADH has a less negative redox potential and therefore less ATP is generated from NADH's contribution to the ETC than FADH2.

Select one of the following:

True
False

Explanation

Question 35 of 49

What is the chemiosmotic coupling hypothesis?

Select one of the following:

The energy from electron transport drives the efflux of hydrogen ions from the matrix into the intermembrane space. This establishes a proton electrochemical gradient. ATP synthesis is driven by ATP synthase using this proton gradient (proton motor force).
The energy from electron transport drives the efflux of hydrogen ions from the intermembrane space into the matrix. This establishes a proton electrochemical gradient. ATP synthesis is driven by ATP synthase using this proton gradient (proton motor force).
The energy from electron transport drives the efflux of hydrogen ions from the matrix into the intermembrane space. This establishes a proton electrochemical gradient. ADP synthesis is driven by ADP synthase using this proton gradient (proton motor force).

Explanation

Question 36 of 49

What is meant by an uncoupled system such as brown adipose?

Select one of the following:

The H+ gradient generated by the energy that is released from the electron transport chain is dissipated as heat instead of being coupled to drive oxidative phosphorylation.
The energy released from the electron transport chain is dissipated as heat instead of being coupled to drive oxidative phosphorylation.

Explanation

Question 37 of 49

How does ATP synthase generate ATP?

Select one of the following:

It allows the proton gradient, established from the energy generated by the electron transport chain, to pass through the membrane and uses this kinetic energy to phosphorylate ADP into ATP.
ATP synthase phosphorylates ADP into ATP from the energy from the electron transport chain.
ATP synthase phosphorylates cAMP into ATP using the proton gradient established from the energy from the electron transport chain.

Explanation

Question 38 of 49

NADH has direct access to reduce the electron transport chain.

Select one of the following:

True
False

Explanation

Question 39 of 49

Brown adipose is important in thermoregulation in neonats and for animals that hibernate.

Select one of the following:

True
False

Explanation

Question 40 of 49

How does an uncoupler such as dinitrophenol work?

Select one of the following:

It carrys the H+ back into the matrix therefore the proton gradient that is established is not used to make ATP via ATP synthase.
It blocks the ATP synthase membrane bound enzyme, therefore stopping oxidative phosphorylation.

Explanation

Question 41 of 49

What molecule is part of the glycerol phosphate shuttle and labelled by the red question mark?

Select one of the following:

Dihydroxyacetone phosphate
1,3-bisphosphoglycerate
Oxaloacetate
Aspartate

Explanation

Question 42 of 49

What reduces the red question mark molecule to glycerol-3-phosphate?

Select one of the following:

NADH -> NAD+
FADH2 -> FAD+

Explanation

Question 43 of 49

What is the first membrane bound complex shown by the green question mark?

Select one of the following:

NADH-Q reductase
Cytochrome C
Succinate-Q reductase
Cytochrome C reductase

Explanation

Question 44 of 49

What is the second membrane bound complex shown by the red question mark?

Select one of the following:

Succinate-Q reductase
NADH-Q reductase
Cytochrome C
Cytochrome C reductase

Explanation

Question 45 of 49

What is the third membrane bound complex shown by the purple question mark?

Select one of the following:

Cytochrome reductase
Succinate-Q reductase
NADH-Q reductase
Cytochrome C

Explanation

Question 46 of 49

What name is given to the electron carriers labelled by the orange triangles?

Select one of the following:

Membrane bound carriers
Mobile carriers
Oxidising enzymes
Fluid carriers

Explanation

Question 47 of 49

ATP is produced during the krebs cycle.

Select one of the following:

True
False

Explanation

Question 48 of 49

How many molecules of NADH are produced during the krebs cycle?

Select one of the following:

Explanation

Question 49 of 49

Why can the krebs cycle not occur without O2?

Select one of the following:

Although the TCA/krebs cycle does not need O2 directly, regeneration of NAD+ and FAD depend upon O2 as a terminal electron acceptor at the end of the ETC. Without O2 as the terminal electron acceptor, the ETC cannot proceed as electrons are not being terminally accepted and thus FADH2 and NADH cannot reduce the ETC carriers as electrons are not passing through the system. Without NAD+ and FAD available, conversion of certain intermediates cannot occur in the TCA cycle but more importantly Glyceraldehyde-3-phosphate cannot be converted to 1,3-bisphosphoglycerate.
Although the TCA/krebs cycle does not need O2 directly, regeneration of NAD+ and FAD depend upon O2 as a terminal electron acceptor at the end of the ETC. Without O2 as the terminal electron acceptor, the ETC cannot proceed as electrons are not being terminally accepted and thus FADH2 and NADH cannot reduce the ETC carriers as electrons are not passing through the system. Without NAD+ and FAD available, conversion of certain intermediates cannot occur in the TCA cycle but more importantly 1,3-bisphosphoglycerate cannot be converted to Glyceraldehyde-3-phosphate.

Explanation

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IBS Set 3 Quiz - Respiration

Question 1 of 49

What enzyme partakes in the reversible reaction shown by the green question mark?

Select one of the following:

Explanation

Question 2 of 49

What enzyme partakes in the reversible reaction shown by the orange question mark?

Select one of the following:

Explanation

Question 3 of 49

What enzyme partakes in the reversible reaction shown by the red question mark?

Select one of the following:

Explanation

Question 4 of 49

What enzyme partakes in the reversible reaction shown by the purple question mark?

Select one of the following:

Explanation

Question 5 of 49

What is the intermediate produced shown by the blue question mark?

Select one of the following:

Explanation

Question 6 of 49

What is the intermediate produced shown by the gray question mark?

Select one of the following:

Explanation

Question 7 of 49

Define substrate level phosphorylation.

Select one of the following:

Explanation

Question 8 of 49

Define oxidative phosphorylation

Select one of the following:

Explanation

Question 9 of 49

When is water produced in glycolysis?

Select one of the following:

Explanation

Question 10 of 49

A kinase enzyme catalyses the removal of a phosphate group from a molecule.

Select one of the following:

Explanation

Question 11 of 49

What molecule is shown by the red question mark?

Select one of the following:

Explanation

Question 12 of 49

What molecule is shown by the green question mark?

Select one of the following:

Explanation

Question 13 of 49

What molecule is shown by the purple question mark?

Select one of the following:

Explanation

Question 14 of 49

What molecule is shown by the orange question mark?

Select one of the following:

Explanation

Question 15 of 49

What molecule is shown by the blue question mark?

Select one of the following:

Explanation

Question 16 of 49

What intermediate does the red question mark show?

Select one of the following:

Explanation

Question 17 of 49

What intermediate does the blue question mark show?

Select one of the following:

Explanation

Question 18 of 49

What enzyme does the green question mark show?

Select one of the following:

Explanation

Question 19 of 49

What enzyme does the orange question mark show?

Select one of the following:

Explanation

Question 20 of 49

What cycle does the diagram show?