nov mock

• What is the process that plants use to trap light energy?

  Photosynthesis
• Why is photosynthesis considered an endothermic reaction?

  Because it takes in energy from light
• What is the main source of energy for plants?

  Light
• Where does photosynthesis take place in a plant?

  In the leaves
• What green chemical in leaves absorbs light energy?

  Chlorophyll
• What are the two main reactants that plants take in for photosynthesis?

  Carbon dioxide and water
• What is produced as a byproduct of photosynthesis?

  Oxygen
• What is the word equation for photosynthesis?

  Carbon dioxide + Water → Glucose + Oxygen
• What is the chemical formula for carbon dioxide?

  CO₂
• What is the chemical formula for water?

  H₂O
• What is the chemical formula for glucose?

  C₆H₁₂O₆
• What is the chemical formula for oxygen?

  O₂
• What happens to the rate of photosynthesis when light intensity is increased?

  The rate of photosynthesis increases
• What does it mean if light intensity is a limiting factor in photosynthesis?

  It means photosynthesis is not occurring at its maximum rate due to insufficient light
• What happens when the rate of photosynthesis levels off despite increasing light intensity?

  Another factor is now limiting the rate of photosynthesis
• What is the effect of increasing carbon dioxide levels on the rate of photosynthesis?

  The rate of photosynthesis increases
• What happens when carbon dioxide is no longer the limiting factor in photosynthesis?

  The rate of photosynthesis levels off
• How does the amount of chlorophyll affect photosynthesis?

  Less chlorophyll means less light energy is trapped, resulting in a lower rate of photosynthesis
• How does temperature affect the rate of photosynthesis?

  Increasing temperature initially increases the rate, but too high a temperature can denature enzymes
• What are the factors that affect the rate of photosynthesis?

  • Light intensity
  • Carbon dioxide levels
  • Amount of chlorophyll
  • Temperature
• What are the stages of photosynthesis?

  1. Absorption of light by chlorophyll
  2. Conversion of carbon dioxide and water into glucose
  3. Production of oxygen as a byproduct
• What happens to enzymes involved in photosynthesis at high temperatures?

  • They work faster up to a point
  • They can denature if the temperature is too high
• What is the significance of chlorophyll in photosynthesis?

  • Chlorophyll absorbs light energy
  • It is essential for the photosynthesis process
• What is produced during photosynthesis?

  Glucose and oxygen
• What is the word equation for photosynthesis?

  Carbon dioxide + water + light energy → glucose + oxygen
• How is glucose used in respiration?

  It is used to release energy
• Where does respiration take place in plant cells?

  In the mitochondria
• When does photosynthesis produce glucose?

  During the day when there is light
• What is the second use of glucose produced by photosynthesis?

  To produce the insoluble storage molecule starch
• How can starch be converted back to glucose?

  By the plant when it's needed, for example at night
• What are fats and oils used for in plants?

  As a storage form of energy
• What is cellulose made from?

  Glucose produced by photosynthesis
• What is the final use of glucose produced in photosynthesis?

  To produce amino acids
• What do plants need to absorb to make amino acids from glucose?

  Nitrate ions from the soil
• What are the main uses of glucose produced in photosynthesis?

  • Release energy in respiration
  • Produce insoluble storage molecule starch
  • Convert to fats and oils for energy storage
  • Produce cellulose for cell wall strength
  • Produce amino acids for protein synthesis
• What are good protein sources made from plants?

  • Peas
  • Beans
  • Lentils
• Where can students find questions on the uses of glucose?

  In the vision workbook
• What should you be able to describe by the end of the video?

  How to investigate the effect of light intensity on the rate of photosynthesis
• What additional concept should higher tier students be able to explain?

  How the results are affected by the inverse square law
• What is the first step in the practical investigation of light intensity on photosynthesis?

  • Take a boiling tube
  • Place it 10 centimeters away from an LED light source