Transcript How plants use glucose

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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What do plants use glucose for?
What do plants with the glucose made by photosynthesis?
Some glucose is used straight away in
respiration.
glucose
Some soluble glucose is converted into
insoluble starch and other substances for
storage. These stores of energy
can 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
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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 it
 chlorophyll –
 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.
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