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AQA GCSE Biology Unit 2.4

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Twenty questions for the fourth section of Unit 2 in AQA GCSE Biology: Energy from respiration.
Matthew T
Quiz by Matthew T, updated more than 1 year ago
Matthew T
Created by Matthew T almost 10 years ago
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Resource summary

Question 1

Question
Which of these is the correct, general, word equation for aerobic respiration?
Answer
  • water + carbon dioxide --> glucose + oxygen
  • glucose + carbon dioxide --> water + oxygen
  • glucose + oxygen --> carbon dioxide + water

Question 2

Question
Which of these is the correct, general, balanced symbol equation for aerobic respiration?
Answer
  • 6H2O + 6CO2 --> C6H12O6 + 6O2
  • C6H12O6 + 6CO2 --> 6H2O + 6O2
  • C6H12O6 + 6O2 --> 6CO2 + 6H2O

Question 3

Question
What is the "unit" of energy in the cell, released by respiration?
Answer
  • Adenosine monophosphate, AMP
  • Adenosine diphosphate, ADP
  • Adenosine triphosphate, ATP

Question 4

Question
True or false? Mitochondria have a folded inner surface to maximise their surface area for enzymes to carry out aerobic respiration.
Answer
  • True
  • False

Question 5

Question
True or false? Active cells, such as muscle cells, need few mitochondria as these release more energy from respiration than the mitochondria in inactive cells.
Answer
  • True
  • False

Question 6

Question
Which of these would not be an ethical way of showing that peas respire?
Answer
  • Using a thermometer to show a rise in temperature which indicates that energy is being released from the peas
  • Comparing sets of peas with varying concentrations of oxygen to see how long they live
  • Piping off the gas produced by the respiring peas and bubbling it through limewater to test for carbon dioxide

Question 7

Question
Which of these activities are important uses of the energy from respiration?
Answer
  • Diffusion of glucose molecules across the partially permeable membrane of the cell
  • Synthesis reactions, such as the construction of amino acids from nitrate ions in plants
  • Contraction of muscles for movement
  • Enabling chloroplasts to carry out photosynthesis
  • Maintenance of core body temperature in mammals and birds

Question 8

Question
True or false? Muscles are made up of bundles of fibres.
Answer
  • True
  • False

Question 9

Question
What name is given to pairs of muscles which contract in opposite directions to produce movement?
Answer
  • Antagonistic
  • Protagonistic
  • Realistic

Question 10

Question
What do animals store excess glucose molecules as?
Answer
  • Starch
  • Cellulose
  • Protein
  • Glycogen

Question 11

Question
True or false? Carbon dioxide must be removed from the blood because it lowers blood pH.
Answer
  • True
  • False

Question 12

Question
Which of these effects occur to the cardiovascular system when you exercise?
Answer
  • Heart rate increases
  • Heart rate decreases
  • Blood vessels constrict
  • Blood vessels dilate

Question 13

Question
Which of these effects occur to the respiratory system when you exercise?
Answer
  • Breathing rate decreases
  • Breathing rate increases
  • Depth of breaths increases
  • Depth of breaths decreases

Question 14

Question
Why do humans sometimes undergo anaerobic respiration?
Answer
  • The air is too polluted so there is too little oxygen in the air
  • The demand for oxygen in respiring cells exceeds the capacity of the blood vessels for carrying oxygen to them
  • The nasal cavities become blocked by mucus so too little oxygen can enter the lungs

Question 15

Question
Which of these is the correct, general, word equation for anaerobic respiration in humans?
Answer
  • glucose --> lactic acid
  • glucose --> carbon dioxide + water
  • lactic acid --> glucose

Question 16

Question
Which of these is the correct, general, word equation for anaerobic respiration in yeasts?
Answer
  • glucose --> ethanol
  • glucose --> ethanol + carbon dioxide
  • ethanol --> glucose

Question 17

Question
True or false? Lactic acid stimulates the muscles to continue exercising.
Answer
  • True
  • False

Question 18

Question
True or false? Anaerobic respiration is inefficient as glucose is not completely broken down.
Answer
  • True
  • False

Question 19

Question
Why do you continue to puff and pant after you have stopped using your muscles for a long period of time?
Answer
  • The brain is fooled into thinking that you are still using your muscles
  • Breathing out helps to cool down the body's core temperature
  • Oxygen is needed to completely break down the lactic acid in your muscles

Question 20

Question
What is the oxygen debt?
Answer
  • The amount of money owed by scuba divers for oxygen tanks
  • The amount of oxygen needed to break down lactic acid in your muscles
  • The amount of oxygen needed to ensure that cardiac muscle has enough energy to continue beating
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