The Transfer of Energy Random Retrieval

This quiz contains all the questions in the The Transfer of Energy section. The website will pick 20 questions at random.

1 / 20

Which term describes an organism which feeds on dead organic matter and digests their food externally? (watch your spelling)

2 / 20

The diagram shows an Arctic food web. Why is the energy efficiency between Forbs and Rock Ptarmigan lower than that between a Rock Ptarmigan and an Arctic Fox?

a) Because more of the body of the Ptarmigan is eaten than the Frobs.

b) Because more of the Ptarmigan is digested and absorbed (assimilated)

c) Because a Ptarmigan is bigger than a Forbs

a) and c)

b) and c)

a) and b)

3 / 20

In the formula for the calculation of NPP, what does the 'R' stand for?

Respiration Rate

Respiratory loss

Renal Excretion

4 / 20

Which direction would the bubble move in the above experiment?

Left ( towards the flask)

Right (away from the flask)

5 / 20

In this investigation, are the yeast respiring anaerobically or aerobically ?

Anaerobically

Aerobically

6 / 20

The diagram represents anaerobic respiration, name substance 'W'.

Reduced NAD

Carbon Dioxide

ADP

7 / 20

The diagram represents anaerobic respiration, name substance 'X'.

Triose Phosphate

Pyruvate

Ribulose Bisphosphate

8 / 20

Is the column for the ETC reaction in the above diagram correct?

Yes

No

9 / 20

Name molecule 'Z'

10 / 20

What is the final electron acceptor of the ETC?

Oxygen

Water

H⁺

11 / 20

Isocitrate dehydrogenase is an enzyme used in the Krebs cycle to convert Citrate into the 5C intermediate. IDH1 is an inhibitor of Isocitrate dehydrogenase. If IDH1 acted as a competitive inhibitor of the enzyme, how would it reduce enzyme activity?

By binding to an allosteric site, altering the tertiary structure of the active site, making it non-complementary to substrates.

By binding to the active site, changing the tertiary structure and therefore making it non-complementary to the substrate.

By blocking the active site, thereby reducing the formation of enzyme-substrate complexes.

12 / 20

Molecule Z represents ATP. How is this molecule of ATP generated?

Enzyme level phosphorylation

Oxidative phosphorylation

Substrate level phosphorylation

13 / 20

Which molecule is represented by Y?

NADP

Reduced NAD

NAD+

14 / 20

How many phosphate groups are present in hexose bisphosphate?

1

2

4

15 / 20

Where does glycolysis occur?

Matrix

Cristae

Cytoplasm

16 / 20

Name the technique detailed in the above diagram ( spell it correctly!)

17 / 20

Explain the results in tube 3.

DCPIP is oxidised for electrons for the electron transfer chain.

DCPIP is reduced by electrons from the electron transfer chain.

DCPIP is photosensitive, and is decolourised by light.

18 / 20

Which wavelengths would the rate of photosynthesis be highest in the above experiment?

450nm (blue)

540nm (green)

590nm (orange)

19 / 20

Name substance D

Carbon Dioxide

Ribulose bisphosphate

Hexose sugar

20 / 20

High energy' electrons leave the chlorophyll molecule: What state does that leave the chlorophyll molecule in?

Oxidised

Reduced

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