Cellular Respiration questions

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Cellular Respiration question collection

Review Cellular Respiration questions for Biology, with correct answers shown and coverage across aerobic respiration; anaerobic respiration; energy transfer in cells.

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Question 1

What is cellular respiration?
  1. Chemical reactions that release energy from glucose
  2. Ventilation that moves air through lungs
  3. Chemical reactions that make glucose using light
  4. Digestion that breaks food into small molecules

Question 2

In most cells, where does aerobic respiration mainly happen?
  1. Mitochondria
  2. Nucleus
  3. Ribosomes
  4. Cell wall

Question 3

Which word equation represents aerobic respiration?
  1. \(\text{Glucose} + \text{oxygen} \to \text{carbon dioxide} + \text{water}\)
  2. \(\text{Carbon dioxide} + \text{water} \to \text{glucose} + \text{oxygen}\)
  3. \(\text{Glucose} \to \text{ethanol} + \text{carbon dioxide}\)
  4. \(\text{Glucose} + \text{oxygen} \to \text{lactic acid}\)

Question 4

Which substance must be available for aerobic respiration?
  1. Oxygen
  2. Nitrogen
  3. Chlorophyll
  4. Starch

Question 5

Which gas does aerobic respiration produce?
  1. Carbon dioxide
  2. Oxygen
  3. Nitrogen
  4. Methane

Question 6

When do muscles use anaerobic respiration?
  1. When oxygen supply cannot meet demand
  2. When glucose supply cannot meet demand
  3. When oxygen supply exceeds demand
  4. When muscles need no energy

Question 7

What does anaerobic respiration produce in muscles?
  1. Lactic acid
  2. Ethanol and carbon dioxide
  3. Carbon dioxide and water
  4. Glucose and oxygen

Question 8

What is anaerobic respiration in yeast called?
  1. Fermentation
  2. Neutralisation
  3. Transpiration
  4. Diffusion

Question 9

What are the main products of anaerobic respiration in yeast?
  1. Ethanol and carbon dioxide
  2. Lactic acid and oxygen
  3. Water and oxygen
  4. Protein and glucose

Question 10

Compared with aerobic respiration, how much energy does anaerobic respiration release?
  1. Less energy per glucose molecule
  2. More energy per glucose molecule
  3. Exactly the same amount of energy
  4. No energy at all

Question 11

Why can muscle anaerobic respiration continue only briefly?
  1. Low energy yield and lactic acid buildup
  2. High energy yield and oxygen buildup
  3. Low energy yield and ethanol buildup
  4. High energy yield and glucose buildup

Question 12

What is oxygen debt after exercise?
  1. Extra oxygen needed to remove lactic acid
  2. Oxygen stored in muscles before exercise
  3. Oxygen used during resting respiration
  4. Oxygen released by anaerobic respiration

Question 13

Why can breathing stay fast after hard exercise?
  1. To supply oxygen for lactic acid removal
  2. To supply oxygen for lactic acid production
  3. To reduce oxygen reaching muscles
  4. To stop carbon dioxide leaving blood

Question 14

Which process happens in both plant and animal cells all the time?
  1. Respiration
  2. Photosynthesis
  3. Pollination
  4. Digestion

Question 15

How can a plant release energy in darkness?
  1. Respire stored glucose
  2. Photosynthesise without light
  3. Convert mineral ions directly into energy
  4. Pause every energy-requiring process

Question 16

Which yeast product makes bread dough rise?
  1. Carbon dioxide
  2. Oxygen
  3. Nitrogen
  4. Hydrogen

Question 17

In brewing, ethanol is produced from what by yeast fermentation?
  1. Glucose
  2. Oxygen
  3. Protein
  4. Mineral ions

Question 18

Which comparison is correct?
  1. Aerobic uses oxygen and releases more energy
  2. Anaerobic uses oxygen and releases more energy
  3. Aerobic uses oxygen and releases less energy
  4. Anaerobic uses oxygen and releases the same energy

Question 19

Limewater turns milky beside germinating seeds. What does this show?
  1. Release of carbon dioxide
  2. Absorption of carbon dioxide
  3. Release of oxygen
  4. Absorption of nitrogen

Question 20

How does warming yeast from 10°C to 30°C usually affect fermentation?
  1. It speeds up as enzyme activity rises
  2. It slows as particles lose kinetic energy
  3. It stops because oxygen becomes available
  4. It produces lactic acid instead of ethanol

Question 21

Which cellular use of respiration builds new cell material?
  1. Making larger molecules
  2. Maintaining body temperature
  3. Contracting muscle fibres
  4. Sending nerve impulses

Question 22

What reactant is used in aerobic respiration besides glucose?
  1. Oxygen
  2. Carbon dioxide
  3. Lactic acid
  4. Chlorophyll

Question 23

Why is respiration described as exothermic?
  1. It releases energy to the surroundings
  2. It absorbs energy from the surroundings
  3. It stores energy as glucose
  4. It requires light from the surroundings

Question 24

Why do muscle cells contain many mitochondria?
  1. High energy demand for contraction
  2. Need for chlorophyll in photosynthesis
  3. Storage of large amounts of genetic material
  4. Secretion of digestive enzymes

Question 25

Which activity relies most on anaerobic respiration?
  1. A 100 m sprint
  2. A slow walk
  3. A gentle cycle
  4. A steady jog

Question 26

What can lactic acid buildup cause during intense exercise?
  1. Muscle fatigue
  2. Higher oxygen production
  3. Faster glucose storage
  4. Increased photosynthesis

Question 27

Which use of respiration helps a mammal stay near 37 °C?
  1. Maintaining body temperature
  2. Making new cells
  3. Contracting muscles
  4. Sending nerve impulses

Question 28

Which condition promotes fermentation in yeast?
  1. Little or no oxygen
  2. Abundant oxygen
  3. No glucose
  4. Boiling temperature

Question 29

Why is respiration essential in active cells?
  1. It releases energy for cell processes
  2. It supplies oxygen for diffusion
  3. It produces glucose for growth
  4. It transports glucose into cells

Question 30

What happens to respiration rate during exercise?
  1. It increases
  2. It falls because less energy is needed
  3. It remains constant during exercise
  4. It occurs only in plants

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Review Cellular Respiration questions for Biology, with correct answers shown and coverage across aerobic respiration; anaerobic respiration; energy transfer in cells.

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