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IBS Set 3 Quiz - Respiration

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Quiz by . ., updated more than 1 year ago
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Created by . . about 9 years ago
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Question 1

Question
What enzyme partakes in the reversible reaction shown by the green question mark?
Image:
01f4c594-f47e-412f-b5f4-cd317eee894c (image/jpg)
Answer
  • Phosphoglucose isomerase
  • Enolase
  • Aldolase
  • Phosphofructo kinase

Question 2

Question
What enzyme partakes in the reversible reaction shown by the orange question mark?
Image:
1d68719b-8b2b-4cfe-9f47-0048378e571d (image/jpg)
Answer
  • Aldolase
  • Phosphoglucose isomerase
  • Phosphoglycerate kinase
  • Enolase

Question 3

Question
What enzyme partakes in the reversible reaction shown by the red question mark?
Image:
0fa39f7f-9797-4ce8-8c77-3e92f3f48162 (image/jpg)
Answer
  • Phosphoglycerate kinase
  • Enolase
  • Aldolase
  • Phosphoglucose isomerase

Question 4

Question
What enzyme partakes in the reversible reaction shown by the purple question mark?
Image:
07ae2c5f-70e6-4caa-b7d5-ed8f03af9c13 (image/jpg)
Answer
  • Enolase
  • Aldolase
  • Phosphoglucose isomerase
  • Phosphoglycerate kinase

Question 5

Question
What is the intermediate produced shown by the blue question mark?
Image:
ac0f19ba-707a-4f9c-9a2e-80084096f8c3 (image/jpg)
Answer
  • 3-Phosphoglycerate
  • 1-Phosphoglycerate
  • 1,3-diphosphoglycerate
  • Succinate

Question 6

Question
What is the intermediate produced shown by the gray question mark?
Image:
796c053d-ff5e-4e47-b352-8c2c4594c5cb (image/jpg)
Answer
  • Phosphoenol pyruvate
  • 1-Phosphoglycerate
  • 3-Phosphoglycerate
  • Acetyl CoA

Question 7

Question
Define substrate level phosphorylation.
Answer
  • 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.

Question 8

Question
Define oxidative phosphorylation
Answer
  • 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.

Question 9

Question
When is water produced in glycolysis?
Answer
  • 2-Phosphoglycerate -> Phosphoenol pyruvate
  • Glucose -> Glucose-6-phosphate
  • Glyceraldehyde 3 phosphate -> 1,3-bisphosphoglycerate
  • Fructose-6-phosphate -> Fructose-1,6-bisphosphate

Question 10

Question
A kinase enzyme catalyses the removal of a phosphate group from a molecule.
Answer
  • True
  • False

Question 11

Question
What molecule is shown by the red question mark?
Image:
3a5fca88-443a-4858-8314-fa4349b69949 (image/jpg)
Answer
  • NAD+
  • O2
  • CO2
  • FADH

Question 12

Question
What molecule is shown by the green question mark?
Image:
3aca1a78-138b-4431-917b-23d4fdf7ade0 (image/jpg)
Answer
  • CO2
  • O2
  • Pyruvate
  • FAD+

Question 13

Question
What molecule is shown by the purple question mark?
Image:
af0aefa6-2774-4624-a581-159447baed9c (image/jpg)
Answer
  • O2
  • NAD+
  • H2O
  • Lactate

Question 14

Question
What molecule is shown by the orange question mark?
Image:
429192f4-68ac-48a8-8d09-d733b537a7a0 (image/jpg)
Answer
  • Lactate
  • O2
  • H2O
  • NAD+

Question 15

Question
What molecule is shown by the blue question mark?
Image:
9f37f549-8cfa-4402-9263-658a41b01035 (image/jpg)
Answer
  • Lactate
  • Pyruvate
  • NADH
  • O2

Question 16

Question
What intermediate does the red question mark show?
Image:
55f53e6c-4f73-4c17-a544-e40855b9731c (image/jpg)
Answer
  • Phosphoenolpyruvate
  • Oxaloacetate
  • Glyceraldehyde-3-phosphate
  • Dihydroxyacetone phosphate

Question 17

Question
What intermediate does the blue question mark show?
Image:
8612208a-4698-4078-a892-03dd19507cbe (image/jpg)
Answer
  • Phosphoenolpyruvate
  • Oxaloacetate
  • Citric acid
  • Fumarate

Question 18

Question
What enzyme does the green question mark show?
Image:
673dda1d-6cd5-4b57-bece-aa5a0ad5cb38 (image/jpg)
Answer
  • Phosphoenolpyruvate carboxykinase
  • Pyruvate dehydrogenase
  • Phosphoglucose isomerase
  • Phosphoglycerate mutase

Question 19

Question
What enzyme does the orange question mark show?
Image:
1ebe5264-8185-4607-84d8-5e233688eb07 (image/jpg)
Answer
  • Pyruvate carboxylase
  • Pyruvate dehydrogenase
  • Pyruvate anhydrase
  • Pyruvate carboxykinase

Question 20

Question
What cycle does the diagram show?
Image:
68deff97-79cb-4911-833c-849a5376ee62 (image/png)
Answer
  • Cori cycle
  • Krebs cycle
  • Calvin cycle

Question 21

Question
Where is glucose converted to lactate in this cycle?
Image:
b95f2ba8-786f-4a9c-a87a-2d9a5ee1c90e (image/png)
Answer
  • Skeletal muscle
  • Liver
  • Kidneys
  • Adipose

Question 22

Question
Where is lactate converted to glucose in this cycle?
Image:
6b76f7d9-ac49-4cbd-8443-17991139ee1e (image/png)
Answer
  • Skeletal muscle
  • Liver
  • Kidneys
  • Adipose

Question 23

Question
The cori cycle uses more ATP in conversion of lactate to glucose than vice versa.
Answer
  • True
  • False

Question 24

Question
Von Gierke's disease leads to a deficiency in the enzyme glucose-6-phosphatase. How might this impact on glycogen levels in the liver?
Answer
  • Glycogen levels will increase
  • Glycogen levels will decrease

Question 25

Question
Coenzyme A performs what function?
Answer
  • 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

Question 26

Question
Pyruvate dehydrogenase complex is made up of what enzymes?
Answer
  • Pyruvate dehydrogenase
  • Dihydrolipoyl transacetylase
  • Dihydrolipoyl dehydrogenase
  • Pyruvate carboxylase
  • Phosphoenolpyruvate carboxykinase

Question 27

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

Question 28

Question
As well as pyruvate, fatty acids and amino acids can also be converted to Acetyl CoA
Answer
  • True
  • False

Question 29

Question
Acetyl CoA can be converted to Amino acids, explaining why a high carbohydrate diet can lead to high protein levels.
Answer
  • True
  • False

Question 30

Question
Electron loss during redox in the electron transport chain usually occurs when hydrogen is removed.
Answer
  • True
  • False

Question 31

Question
The less negative a substances redox potential, the greater the tendency to donate electrons.
Answer
  • True
  • False

Question 32

Question
Carriers of different redox potentials pass their electrons on to carriers with a less negative redox potential.
Answer
  • True
  • False

Question 33

Question
Loss of hydrogen indicates oxidation.
Answer
  • True
  • False

Question 34

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

Question 35

Question
What is the chemiosmotic coupling hypothesis?
Answer
  • 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).

Question 36

Question
What is meant by an uncoupled system such as brown adipose?
Answer
  • 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.

Question 37

Question
How does ATP synthase generate ATP?
Answer
  • 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.

Question 38

Question
NADH has direct access to reduce the electron transport chain.
Answer
  • True
  • False

Question 39

Question
Brown adipose is important in thermoregulation in neonats and for animals that hibernate.
Answer
  • True
  • False

Question 40

Question
How does an uncoupler such as dinitrophenol work?
Answer
  • 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.

Question 41

Question
What molecule is part of the glycerol phosphate shuttle and labelled by the red question mark?
Image:
450478e7-fa20-41f5-9492-36118603770a (image/jpg)
Answer
  • Dihydroxyacetone phosphate
  • 1,3-bisphosphoglycerate
  • Oxaloacetate
  • Aspartate

Question 42

Question
What reduces the red question mark molecule to glycerol-3-phosphate?
Image:
35b0b2c7-5c64-41df-a2b9-72dcab5730db (image/jpg)
Answer
  • NADH -> NAD+
  • FADH2 -> FAD+

Question 43

Question
What is the first membrane bound complex shown by the green question mark?
Image:
5e3c6ad5-01ab-4cd7-a17b-1d81f84dae9a (image/jpg)
Answer
  • NADH-Q reductase
  • Cytochrome C
  • Succinate-Q reductase
  • Cytochrome C reductase

Question 44

Question
What is the second membrane bound complex shown by the red question mark?
Image:
d1949e77-69ea-48ff-9473-f71d4d202427 (image/jpg)
Answer
  • Succinate-Q reductase
  • NADH-Q reductase
  • Cytochrome C
  • Cytochrome C reductase

Question 45

Question
What is the third membrane bound complex shown by the purple question mark?
Image:
41146001-a3f9-4f6b-9f64-a08611cff166 (image/jpg)
Answer
  • Cytochrome reductase
  • Succinate-Q reductase
  • NADH-Q reductase
  • Cytochrome C

Question 46

Question
What name is given to the electron carriers labelled by the orange triangles?
Image:
49f71987-5e1d-41ca-a85d-9d8f2cc3dd1f (image/jpg)
Answer
  • Membrane bound carriers
  • Mobile carriers
  • Oxidising enzymes
  • Fluid carriers

Question 47

Question
ATP is produced during the krebs cycle.
Answer
  • True
  • False

Question 48

Question
How many molecules of NADH are produced during the krebs cycle?
Image:
ca93ae46-bfea-4a31-b8fe-8cbe92cfc605 (image/jpg)
Answer
  • 3
  • 2
  • 1
  • 5

Question 49

Question
Why can the krebs cycle not occur without O2?
Answer
  • 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.
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