emmabrudenell
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Quiz on Cell biology- glycolysis, krebs cycle and oxidative phosphorylation, created by emmabrudenell on 27/05/2014.

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emmabrudenell
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Cell biology- glycolysis, krebs cycle and oxidative phosphorylation

Question 1 of 15

1

The main enzymes targets for regulation in the krebs cycle are:

Select one of the following:

  • citrate synthase and fumarase

  • Aconitase, succinate dehydrogenase and fumarase

  • citrate synthase, isocitrate dehydrogenase and alpha ketoglutarate dehydrogenase

  • isocitrate dehydrogenase and alpha ketoglutarate dehydrogenase

Explanation

Question 2 of 15

1

Sodium fluoroacetate is...

Select one of the following:

  • part of the krebs cycle

  • an enzyme in the krebs cycle

  • A poison which disrupts the krebs cycle

  • Naturally in the body and is an activator of the krebs cycle

Explanation

Question 3 of 15

1

Beriberi is a vitamin C deficiency characterised by neurological and cardiac symptoms

Select one of the following:

  • True
  • False

Explanation

Question 4 of 15

1

Leigh's syndrome is a fatal neurodegenerative disorder caused by inherited faults in oxidative phosporylation. The pathology of the disease is bilateral lesions. Where are these found?

Select one or more of the following:

  • thalamus, Basal ganglia and brain stem and spinal cord

  • thalamous, Basal ganglia and brain stem

  • brain stem, basal ganglia and spinal cord

  • spinal cord and brain stem

Explanation

Question 5 of 15

1

Electrons used in oxidative phosphorylation come from...?

Select one of the following:

  • NADH

  • FADH2

  • NADH and FADH2

  • The cytosol of the mitochondrion

Explanation

Question 6 of 15

1

Complex two pumps out 2 hydrogen ions for every 2 electrons

Select one of the following:

  • True
  • False

Explanation

Question 7 of 15

1

The krebs cycle can be regulated by hormones

Select one of the following:

  • True
  • False

Explanation

Question 8 of 15

1

What is Beriberi?

Select one of the following:

  • A vitamin C deficiency- characterised by neurological and cardiac symptoms

  • A vitamin b1 deficiency- characterised by neurological and cardiac symptoms

  • A vitamin b1 deficiency- characterised by muscle wasting

  • A vitamin C deficiency- characterised by muscle wasting

Explanation

Question 9 of 15

1

The main target for regulation in the krebs cycle is on the reactions that are reversible

Select one of the following:

  • True
  • False

Explanation

Question 10 of 15

1

The PDH is inactive when bound to phosphate

Select one of the following:

  • True
  • False

Explanation

Question 11 of 15

1

The PDH is required in the krebs cycle for the following reaction to take place; oxaloacetate+ acetyl CoA ---> citrate

Select one of the following:

  • True
  • False

Explanation

Question 12 of 15

1

Which of the following are the steps which are regulated in glycolysis?

Select one or more of the following:

  • glucose to glucose-6-phosphate

  • glucose-6-phosphate to fructose-6-phosphate

  • fructose-6-phosphate to fructose-1,6-bisphosphate

  • 3-phosphoglycerate to 2-phosphoglycerate

  • phosphoenolpyruvate to pyruvate

Explanation

Question 13 of 15

1

Arsenate will substitute for phosphate in 3- phosphoglycerate

Select one of the following:

  • True
  • False

Explanation

Question 14 of 15

1

Arsenate is a bad because it makes the net ATP production from the krebs cycle be 0

Select one of the following:

  • True
  • False

Explanation

Question 15 of 15

1

The net ATP production of glycolysis is 2

Select one of the following:

  • True
  • False

Explanation

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