Bioenergetics questions

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Bioenergetics question collection

Review Bioenergetics questions for Biology, with correct answers shown and coverage across photosynthesis and limiting factors; aerobic and anaerobic respiration; metabolism in organisms.

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Question 1

Which word equation is correct for photosynthesis?
  1. \(\text{Carbon dioxide} + \text{water} \to \text{glucose} + \text{oxygen}\)
  2. \(\text{Glucose} + \text{oxygen} \to \text{carbon dioxide} + \text{water}\)
  3. \(\text{Carbon dioxide} + \text{oxygen} \to \text{glucose} + \text{water}\)
  4. \(\text{Water} + \text{glucose} \to \text{carbon dioxide} + \text{oxygen}\)

Question 2

Which pair are limiting factors of photosynthesis?
  1. Light intensity and carbon dioxide concentration
  2. Oxygen concentration and soil pH
  3. Chlorophyll amount and oxygen concentration
  4. Water depth and air pressure

Question 3

What causes photosynthesis rate to level off as light intensity rises?
  1. Another factor becoming limiting
  2. Less light reaching chloroplasts
  3. Chlorophyll becoming a reactant
  4. Respiration replacing photosynthesis

Question 4

What causes photosynthesis to fall at very high temperature?
  1. Denaturation of photosynthesis enzymes
  2. Slower movement of chlorophyll particles
  3. Carbon dioxide becoming a limiting mineral
  4. Glucose changing back into light energy

Question 5

Why do plants convert some glucose from photosynthesis into starch?
  1. To store energy
  2. To absorb light in chloroplasts
  3. To transport water in xylem
  4. To neutralise soil acids

Question 6

What do plants make from glucose and nitrate ions?
  1. Amino acids
  2. Fatty acids
  3. Carbon dioxide
  4. Cellulose

Question 7

When does iodine solution turn blue-black in the starch test on a leaf?
  1. When starch is present
  2. When glucose is absent
  3. When protein is present
  4. When lipids are present

Question 8

Which word equation is correct for 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 9

Which result shows respiration is exothermic?
  1. Germinating seeds warm their surroundings
  2. Germinating seeds consume oxygen
  3. Seedlings lose stored dry mass
  4. Seedlings produce carbon dioxide

Question 10

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

Question 11

What does a plant make from glucose to build its cell walls?
  1. Cellulose
  2. Starch
  3. Protein
  4. Lipid

Question 12

Which products form during anaerobic respiration in yeast?
  1. Ethanol and carbon dioxide
  2. Lactic acid and oxygen
  3. Water and oxygen
  4. Protein and glucose

Question 13

In bread making, what does yeast produce that causes dough to rise?
  1. Carbon dioxide
  2. Oxygen
  3. Water vapour
  4. Nitrogen

Question 14

Why does oxygen uptake increase during exercise?
  1. Muscles increase aerobic respiration
  2. Muscles increase photosynthesis
  3. Muscles stop releasing energy
  4. Muscles produce oxygen from lactic acid

Question 15

If a pondweed produces \(36\) bubbles in \(3\,\mathrm{min}\), what is the average rate?
  1. \(12\) bubbles per minute
  2. \(9\) bubbles per minute
  3. \(18\) bubbles per minute
  4. \(108\) bubbles per minute

Question 16

Where does most aerobic respiration occur in a cell?
  1. Mitochondria
  2. Chloroplasts
  3. Ribosomes
  4. Nucleus

Question 17

What is chlorophyll's function?
  1. Absorb light for photosynthesis
  2. Absorb nitrate ions from soil
  3. Transport water through xylem
  4. Break down glucose in respiration

Question 18

Why do plants store some glucose as starch?
  1. Starch is insoluble and suitable for storage
  2. Starch diffuses out of cells quickly
  3. Starch is a gas
  4. Starch provides light energy

Question 19

What is the role of nitrate ions in plants?
  1. Making proteins for growth
  2. Making cell walls from cellulose
  3. Transporting oxygen
  4. Producing antibodies

Question 20

Why do plants need magnesium ions?
  1. To make chlorophyll
  2. To make red blood cells
  3. To digest lipids
  4. To form antibodies

Question 21

What is oxygen debt?
  1. Extra oxygen needed after exercise to remove lactic acid
  2. Oxygen stored in bones
  3. A lack of carbon dioxide in blood
  4. A type of blood clot

Question 22

Which yeast product is useful in brewing?
  1. Ethanol
  2. Lactic acid
  3. Oxygen
  4. Starch

Question 23

Which is the balanced equation for photosynthesis?
  1. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
  2. CO₂ + H₂O → C₆H₁₂O₆ + O₂
  3. 6O₂ + C₆H₁₂O₆ → 6CO₂ + 6H₂O
  4. 6CO₂ + 6O₂ → C₆H₁₂O₆ + 6H₂O

Question 24

What does metabolism include?
  1. Both synthesis and breakdown reactions
  2. Synthesis but not breakdown reactions
  3. Breakdown but not synthesis reactions
  4. Neither synthesis nor breakdown reactions

Question 25

A lamp moves twice as far away. Light intensity falls to what?
  1. 25%
  2. 50%
  3. 200%
  4. 400%

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Review Bioenergetics questions for Biology, with correct answers shown and coverage across photosynthesis and limiting factors; aerobic and anaerobic respiration; metabolism in organisms.

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