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How plants use glucose from photosynthesis

How plants use glucose from photosynthesis

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Explainer Video

Tutor: Holly

Summary

How plants use glucose from photosynthesis

In a nutshell

Plants produce glucose during photosynthesis. Glucose is used in many different ways, for example, in respiration and to make cell walls. 



Uses of glucose

Use

Explanation

Respiration
Glucose can be broken down. The chemical energy that is released can be used by the plant in other process such as protein synthesis.
Making cell walls
Lots of glucose molecules can be joined together to form cellulose. This molecule is used to build up the cell wall.
Making amino acids
Glucose can be combined with nitrate ions (from the soil) to make amino acids. These amino acids are used to make proteins.
Stored as oils or fats
Glucose can be made into lipids (oils and fats) that can be stored in seeds.
Stored as starch
Lots of glucose molecules can be joined together to make starch. This can be stored in roots, stems and leaves as grains. When the plants are not carrying out photosynthesis, they can use the starch as an energy source. 

Starch is also insoluble which means it can't dissolve in water. This makes it a better energy store than glucose as glucose is soluble. So, if there was a high concentration of glucose in the cell, water would be drawn in and the cell would swell.


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Animal cells, plant cells, and unicellular organisms

Unit 1

Animal cells, plant cells, and unicellular organisms

Photosynthesis and plant adaptations

Unit 2

Photosynthesis and plant adaptations

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How plants use glucose from photosynthesis

Unit 3

How plants use glucose from photosynthesis

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FAQs - Frequently Asked Questions

How does glucose contribute to protein production?

Glucose can be combined with nitrate ions (from the soil) to make amino acids. These amino acids are used to make proteins.

How does glucose turn into cellulose?

Lots of glucose molecules can be joined together to form cellulose. This molecule is used to build up the cell wall.

How is glucose used by respiration?

Glucose can be broken down. The chemical energy that is released can be used by the plant in other process such as protein synthesis.

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