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Photosynthesis, Food Production and Management of the Environment

Using TP and GP to build carbohydrates, lipids and amino acids

  • 3 things to know
  • Components 01, 02 and 03

Overview

Recall questions on turning triose phosphate into hexose, starch, sucrose, cellulose and triglycerides, building amino acids from GP with nitrate and sulfate, nitrate deficiency, and why plant respiration and animal nutrition both depend on photosynthesis.

What you need to know

Answer each one before you reveal it.

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Key term

How many triose phosphate molecules combine to form a hexose phosphate, and what is a hexose phosphate the precursor of?

Key term

Name the storage carbohydrate a plant makes from the products of photosynthesis, and state where it is stored.

Key term

Which structural polysaccharide is built from the products of photosynthesis, and where is it deposited?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    How many triose phosphate molecules combine to form a hexose phosphate, and what is a hexose phosphate the precursor of?

    Model answer

    Two triose phosphate molecules combine to form one hexose phosphate, which is the precursor of glucose.

  2. 2

    Name the storage carbohydrate a plant makes from the products of photosynthesis, and state where it is stored.

    Model answer

    Starch, which is stored as grains in the stroma of the chloroplast and in storage organs such as tubers.

  3. 3

    Which carbohydrate carries the products of photosynthesis around the plant in the phloem?

    Model answer

    Sucrose.

  4. 4

    Which structural polysaccharide is built from the products of photosynthesis, and where is it deposited?

    Model answer

    Cellulose, which is deposited in the plant cell wall.

  5. 5

    How is triose phosphate used in the synthesis of a triglyceride?

    Model answer

    Triose phosphate is converted to glycerol and also provides the acetyl units from which fatty acid chains are built, and the two components are then combined.

  6. 6

    Which Calvin cycle intermediate is the starting point for amino acid synthesis?

    Model answer

    Glycerate-3-phosphate.

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