How plants use glucose

LO: Know how plants use glucose and how we can test for these substances

How plants make and use glucose

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• Click on the link and make notes.

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What do plants use glucose for?

glucose

Some glucose is used straight away in respiration.

Some soluble glucose is converted into insoluble starch and other substances for storage. These stores of energycan be used later when the plant needs them.

Some glucose is used to make new chemicals :1) proteins for cell growth;2) fats and oil for storage;3) cellulose which strengthens the cell wall

What do plants with the glucose made by photosynthesis?

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Making proteins – continued…

• Glucose is combined with nitrate ions (NO3-) (absorbed from the soil) to make amino acids which are then made into proteins.

• So proteins are chains of amino acids

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Testing leaves for starch – variegated and non-variegated

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Anagrams

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Multiple-choice quiz

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Glossary - know your vocab!

Write down each keyword and define itchlorophyll – The green pigment inside chloroplasts

that plants need for photosynthesis to take place.

chloroplast – The part of a plant cell where photosynthesis occurs.

glucose – The sugar plants make during photosynthesis. It’s

formula is: C6H12O6. It is used for respiration, stored as starch and used to make proteins and fats

palisade cell – A specialised leaf cell found in the mesophyll tissue

of a leaf and is packed with lots of chloroplasts for photosynthesis.

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Glossary cont.

photosynthesis – The process by which plants use carbon dioxide and water to produce

glucose and oxygen in the presence of light and chlorophyll.

starch – Extra glucose from photosynthesis is stored as this substance which

can be tested for with iodine. The iodine turns blue/black.

stomata – Small holes in the lower surface of a leaf

that allow gases in and out – controlled by guard cells.

xylem – Tubes in veins/vascular bundles that carry water and dissolved mineral

ions around a plant.