Bioenergetics GCSE

What is the balanced equation for photosynthesis?

• 6O₂ + 6C₆H₁₂O₆ --> 6CO₂ + 6H₂O

• 6O₂ + C₆H₁₂O₆ --> 6CO₂ + 6H₂O

• CO₂ + H₂O --> O₂ + C₆H₁₂O₆

• 6CO₂ + 6H₂O --> 6O₂ + C₆H₁₂O₆

How do plants use glucose?

• Photosynthesis

• Respiration

• Building amino acids

• Transpiration

In which section of the leaf does most photosynthesis take place?

• Spongy mesophyll

• Upper epidermis

• Lower epidermis

• Palisade mesophyll

Which of these substances do plants use glucose to make?

• Lipids

• Cellulose

• Glycogen

• Amino acids

Which of these is not a limiting factor for photosynthesis?

• Water concentration

• Carbon dioxide concentration

• Temperature

• Light intensity

What limits photosynthesis in certain parts of a variegated leaf?

Why does increasing temperature increase the rate of photosynthesis?

• The enzymes denature

• Photosynthesis happens faster

• There are more reactants so the reaction can happen faster

• Reactants and enzymes collide more frequently

What is the independent variable in this investigation?

• Carbon dioxide concentration

• Temperature

• Light intensity

• Volume of oxygen produced

How could the accuracy of this experiment be improved?

• Repeat the experiment three times

• Use a gas syringe to collect the oxygen produced

• Use an LED light

• Change the pondweed after each measurement

What is the relationship between light intensity and distance?

• Light intensity ∞ 1 / distance

• Light intensity ∞ 1 / distance²

• Light intensity ∞ distance

• Light intensity ∞ distance²