Topic Overview - Photosynthesis and Respiration

#1. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

Select all that apply:

Chloroplasts migrate back into the stems overnight - protects them from cold weather

Guard cells open and close stomata - control water loss

Transparent epidermis - allows sunlight to travel straight into the leaves

Palisade layer filled with chloroplasts is just below the epidermis - maximising light intensity

Guard cells open and close the entrance to leaves from stems - isolates infected leaves

#2. Is photosynthesis an endothermic or an exothermic reaction?

Endothermic - takes in energy

Exothermic - puts out energy

#3. What is the word equation for photosynthesis? ? In some examples you might also see sunlight and chlorophyll above and below the arrow.

carbon monoxide + water → glucose + oxygen

carbon dioxide + water → glucose + oxygen

silicon dioxide + water → glucose + oxyen

#4. In which sub-cellular structure inside plant cells does photosynthesis occur?

enter answer here...

#5. Which system is responsible for ensuring the supply of oxygen and glucose to cells?

Immune System

Nervous System

Circulatory System

#6. In what part of the cells does aerobic respiration take place?

Cytoplasm

Mitochondria

Ribosomes

#7. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.

glucose → lactic acid

oxygen + glucose → lactic acid

methane + glucose → lactic acid

lactic acid → glucose

#8. What is the purpose of respiration?

Provide energy to the cells

To make glucose

#9. True or false - plants remove carbon from the atmosphere during photosynthesis

true

false

#10. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ..... + water

enter answer here...

#11. Which of these is the correct explanation for why photosynthesis is slower at lower temperatures?

At low temperatures particles are moving slowly and collide less often. These collisions are necessary for reactions to take place, such as photosynthesis.

At low temperatures particles are unable to react because they each need to be thermally activated which happens at 23˚C.

At low temperatures particles exert a very slight repulsive force against each other, preventing the necessary reactions for photosynthesis.

#12. Is respiration an exothermic or an endothermic reaction?

Endothermic

Exothermic

#13. What is an advantage of anaerobic respiration?

It is very efficient at generating energy

It can provide energy very quickly without the need for oxygen

#14. What is the balanced chemical equation for photosynthesis?

C₆H₁₂O₆ → 2O₂ + CO₂

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

CO₂ + H₂O → 2C₆H₁₂O₆ + 6O₂

6CO + 6H₂ → C₆H₁₂O₆

#15. In which part of the cell does anaerobic respiration take place?

Ribosomes

Cytoplasm

Mitochondria

#16. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

Select all that apply:

Flat leaves - reduces distance for diffusion of gases

Large leaves - bigger surface area

Leaves retract inside stems overnight - avoiding water loss

Root hair cells are thin and very numerous - increasing surface area

Leaves have stomata - for gaseous exchange

Remember to carefully read the question, if you selected Root hair cells, you were mistaken because the question asked about leaves, not roots.

#17. During exercise, your cells require more oxygen and glucose. What changes in the body happen during exercise to meet these increased needs?

Select all that apply:

Increased breathing rate

Increased heart rate

Increased digestion rate of lipids

#18. What is the difference between aerobic and anaerobic respiration?

Aerobic respiration produces glucose as a byproduct, anaerobic produces lactic acid

Aerobic includes oxygen, anaerobic doesn't include oxygen

Aerobic happens only in fungi and anaerobic happens only in animals

#19. What is the molecular formula for glucose?

CH₄

C₆H₁₂O₆

CO₆

#20. Which of the following are the 4 factors that affect the rate of photosynthesis?

Select all that apply:

Concentration of atmospheric nitrogen

Air temperature

Light intensity

Concentration of dissolved oxygen in the soil

Availability of nitrogen in the soil

Amount of chloroplasts in cells

Concentration of atmospheric carbon dioxide

#21. Why do high breathing and heart rates remain after exercise?

Select all that apply:

To replace the oxygen lost from blood and muscles

Additional oxygen is required to get the energy needed to remove lactic acid

It takes a few minutes for the heart and lungs to respond to a change in physical activity

#22. Oxygen enters the body via the?

Brain

Heart

Lungs

#23. Glucose enters the body via the?

Small intestine

Lungs

Brain

Topic Overview - Photosynthesis and Respiration

Good Luck!

Results

#1. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

#2. Is photosynthesis an endothermic or an exothermic reaction?

#3. What is the word equation for photosynthesis? ? In some examples you might also see sunlight and chlorophyll above and below the arrow.

#4. In which sub-cellular structure inside plant cells does photosynthesis occur?

#5. Which system is responsible for ensuring the supply of oxygen and glucose to cells?

#6. In what part of the cells does aerobic respiration take place?

#7. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.

#8. What is the purpose of respiration?

#9. True or false - plants remove carbon from the atmosphere during photosynthesis

#10. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ..... + water

#11. Which of these is the correct explanation for why photosynthesis is slower at lower temperatures?

#12. Is respiration an exothermic or an endothermic reaction?

#13. What is an advantage of anaerobic respiration?

#14. What is the balanced chemical equation for photosynthesis?

#15. In which part of the cell does anaerobic respiration take place?

#16. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

#17. During exercise, your cells require more oxygen and glucose. What changes in the body happen during exercise to meet these increased needs?

#18. What is the difference between aerobic and anaerobic respiration?

#19. What is the molecular formula for glucose?

#20. Which of the following are the 4 factors that affect the rate of photosynthesis?

#21. Why do high breathing and heart rates remain after exercise?

#22. Oxygen enters the body via the?

#23. Glucose enters the body via the?

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