4.1 How Plants Make and Use Glucose

What three things are needed for a plant to photosynthesise?

• Glucose, Oxygen, Sunlight

• CO₂, Oxygen, Sunlight

• CO₂, Water, Sunlight

• Oxygen, Water, Sunlight

What 3 factors are limiting factors of photosynthesis?

• Carbon dioxide concentration, Oxygen concentration , Water

• Carbon dioxide concentration, Temperature, Water

• Temperature, Water, Light intensity

• Carbon dioxide concentration, Temperature, Light intensity

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Farmers can use their knowledge of factors limiting the rate of photosynthesis to increase crop yields. What is the best place to grow crops so factors can be controlled?

• In a field

• In a lab

• In a garden

• In a greenhouse

Which of the following will increase a farmers crop yield?

• Using artificial light to allow photosynthesis to continue

  beyond daylight hours. The use of additional carbon dioxide released into the atmosphere inside the greenhouse also allows photosynthesis to continue at an increased rate.

• Using artificial heating to allow photosynthesis to continue at an increased rate.

• Releasing additional additional carbon dioxide into the atmosphere inside the greenhouse also allows photosynthesis to continue at an increased rate.

• All of the above

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The glucose made in photosynthesis is ...

• converted into insoluble substances like oils, fats and starch for storage.

• used in respiration to release energy

• converted into other substances in plants. For example:

  Cellulose for cell walls Proteins for growth and repair.

• All of the above

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What are the advantages of using insoluble substances such as starch for storage, rather than soluble substances such as glucose

• They do not affect the water concentration inside cells

• They do not move away from the storage areas in the plant

• Both are correct

• Neither are correct

Some glucose is used by plants to produce Cellulose, this is used to

• build cell membranes

• strengthen cell walls

• make the nucleus

• make ribosomes

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Some glucose is used by plants to produce Proteins examples of proteins are

• Starch and Fatty Acids

• Chlorophyll and Starch

• Starch and Enzymes

• Enzymes and Chlorophyll

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Plants also need nitrates to make proteins. They obtain these from

• The air as nitrate ions

• The soil as nitrate ions

• The air as nitrogen

• The soil as nitrogen

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As well as Glucose what is the second product of photosynthesis?

• Nitrates

• Toffee

• Oxygen

• Nitrogen