CIE IGCSE Biology

Topic Questions

IGCSEBiologyCIETopic Questions12. Respiration12.1 Respiration

12.1 Respiration

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1
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Glucose is broken down in the chemical processes of aerobic respiration.

Which row of the table below shows the correct products of this breakdown?

 

energy

water

lactic acid

carbon dioxide

A

X

X

✔

X

B

✔

X

X

✔

C

X

✔

X

✔

D

✔

✔

X

✔

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2
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Which of the following is the correct word equation for aerobic respiration in plants?

  • glucose + oxygen → carbon dioxide + water

  • carbon dioxide + water → glucose + oxygen

  • glucose + water → carbon dioxide + oxygen

  • glucose + carbon dioxide → water + oxygen

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3
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Which of the following processes require, and are dependent on, the activity of enzymes?

  1. aerobic respiration
  2. glucose → lactic acid
  3. osmosis
  4. anaerobic respiration in yeast

  • 1 and 2

  • 1 and 3

  • 1, 2 and 4

  • All of them 

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4
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A student investigated respiration in yeast. They set up the experiment as shown in the diagram below.

061062-may-2018-paper-6-q1-respiration---atp-sq

Every 30 minutes they replaced the water with the same volume but it was 10 oC warmer and counted the bubbles given off in 2 minutes. 

What are the independent and dependent variables in this experiment?

  independent dependent
A number of bubbles time
B time number of bubbles
C water temperature number of bubbles
D water temperature volume of water

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5
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Which of the following do humans require energy for?

  1. Producing proteins
  2. Cell division
  3. Generation of nerve impulses
  4. Maintaining body temperature

  • 1 & 3

  • 2, 3 & 4

  • 4 only

  • All of the above

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1
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Extended only

Four metabolic reactions that can occur in living organisms are shown below:

  1. C6H12O6 + 6O2 → 6CO2+ 6H2O
  2. glucose → lactic acid
  3. 6CO2+ 6H2O → C6H12O6 + 6O2
  4. C6H12O6 → 2C2H5OH + 2CO2

Which of the above reactions take place in yeast cells to release energy?

  • 1 and 2

  • 1 and 3

  • 3 and 4

  • 1 and 4

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2
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Which of the following processes would release the most energy in a cell from one molecule of glucose?

  1. Aerobic respiration in yeast
  2. Aerobic respiration in animals
  3. Aerobic respiration in plants

  • 2 only

  • 3 only

  • 1 & 3

  • All of the above

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3
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In which conditions would the cells of a dicotyledonous green plant respire?

 

mesophyll cell

root hair cell

darkness

bright light

darkness

bright light

A

✔

X

✔

X

B

X

✔

X

X

C

X

X

X

X

D

✔

✔

✔

✔

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4
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Extended only

Which of the following is the correct balanced symbol equation for aerobic respiration in yeast cells?

  • C6H12O6   +  6 O2 →  6 CO2 + 6 H2O

  • C6H12O6 →  2 C3H6O3

  • 6 CO2 + 6 H2O →  C6H12O6  + 6 O2

  • C6H12O6  →  2 C2H5OH + 2 CO2

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5
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The list below shows four metabolic processes that can occur in living cells.

  1. carbon dioxide + water →  glucose + oxygen
  2. glucose → lactic acid
  3. glucose + oxygen →  carbon dioxide + water
  4. glucose →  alcohol + carbon dioxide

Which row of the table correctly represents the processes that can occur in muscle cells and yeast cells.

 

in muscles

in yeast

A

3 only

1 & 4

B

3 & 4

2 & 3

C

2 only

1, 3 & 4

D

2 & 3

3 & 4

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1
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Which row in the table below shows the correct products produced by anaerobic respiration in yeast and in animals?

 

animals

yeast

lactic acid

carbon dioxide

lactic acid

carbon dioxide

A

X

✔

X

X

B

✔

X

X

✔

C

X

✔

✔

X

D

✔

✔

✔

X

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2
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Extended only

During vigorous exercise, such as cycling uphill, lactic acid builds up in the muscles.

How is this lactic acid removed during recovery?

  • excretion of lactic acid by the kidneys

  • anaerobic respiration of lactic acid in the muscles

  • aerobic respiration of lactic acid in the liver

  • excretion of lactic acid by the lungs

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3
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Why does anaerobic respiration of glucose release less energy in muscle cells than aerobic respiration?

  1. Energy is lost in oxygen.
  2. Energy remains trapped in the chemical bonds in the molecule lactic acid.
  3. Energy remains trapped in the chemical bonds in the molecule ethanol.
  4. Energy is lost in carbon dioxide.

  • 1, 2 and 4

  • 2 only

  • 2 and 3

  • 4 only

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4
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The diagram below shows an experimental set-up which can be used to investigate gas exchange in a plant leaf.

12--image-1-gas-exchange-leaf

In which direction would the ink drop move and for what reason?

 

direction

reason

A

to the right

photosynthesis

B

to the left

photosynthesis

C

to the right

respiration

D

to the left

respiration

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5
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The graph below shows the results of an investigation into how the rate of respiration of an organism is affected by changing the temperature.

12--image-2-respiration-rat

Which of the following statements would explain the difference between the rate of respiration at 10 °C and that at 30 °C?

  • Enzyme activity is higher at 30 °C because more frequent collisions are occurring than at 10 °C.

  • Enzyme activity at 30 °C is lower because the bonds holding an enzyme together are altered at higher temperatures.

  • Enzyme activity is at its optimum at 30 °C, meaning the rate is at its highest.

  • Enzyme activity is lower at 10 °C because the enzymes are denatured and therefore unable to bind to their substrates.

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6
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The diagram below shows an experiment set up by a group of students to investigate respiration in yeast.

12--image-3-yeast-experimen

Which row of the table below correctly describes the contents of the flask after 20 hours?

 

new compound

gas produced

A

ethanol (alcohol)

oxygen

B

ethanol (alcohol)

carbon dioxide

C

lactic acid

oxygen

D

lactic acid

carbon dioxide

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7
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The diagram below shows an experiment set up by a teacher to demonstrate how an investigation into anaerobic respiration in yeast cells can be carried out.

12--image-4-yeast-experiment

Predict what would happen to the coloured liquid in the glass tube. 

  • Doesn’t move

  • Moves to the left

  • Moves rapidly to the right

  • Moves slowly to the right

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