EXAM - Photosynthesis & Food Chains Flashcards
LABEL ALL THE STRUCTURES OF THE PLANT CELL
LABEL ALL THE STRUCTURES OF THE PLANT CELL
Cell membrane function
Let’s substances in and out of the cell
Nucleus function
Controls the cell and holds set of instructions needed to make new cells
Cytoplasm function
Cell reactions happen here
Cell wall function
Helps the plant keep it’s shape
Chloroplast function
Contains chlorophyll, a green pigment that traps light and converts it into food during a reaction called photosynthesis
Vacuole function
Holds fluid called sap
Label the diagram of a monocular microscope
Label the diagram of a monocular microscope
Making a leaf peel
Paint a small area of the back of the leaf with nail polish
Let it dry
Stick a piece of Sellotape on top of the nail polish and press down firmly
Peel the Sellotape off, the nail polish should come with it, And stick it onto a clean microscope slide
Observe the slide under the microscope
MAKE A DRAWING OF CELLS VIEWED UNDER THE MONOCULAR MICROSCOPE
MAKE A DRAWING OF CELLS VIEWED UNDER THE MONOCULAR MICROSCOPE
What is the importance of photosynthesis
It is a chemical reaction and plants need it to make food
State the word equation for photosynthesis
Carbon Dioxide + Water —-> Glucose + Oxygen
The part of a plant where photosynthesis takes place
The leaf
What is chlorophyll
chlorophyll, a green pigment that traps light and converts it into food during a reaction called photosynthesis
The two raw materials for photosynthesis are
Water and Carbon Dioxide
How do water and carbon dioxide enter the leaf
Water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf. Water enters the root and is transported up to the leaves through specialized plant cells known as xylem vessels.
What are the two products of photosynthesis
Water & Carbon Dioxide
What happens to water and Carbon Dioxide for photosynthesis
Water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf. Water enters the root and is transported up to the leaves through specialized plant cells known as xylem vessels.
Recall the steps for testing a leaf for starch and no why the steps are required
Pour the leaf into boiling water for a few seconds - This kills the leaf and stops any further reactions taking place
Boil the ethanol using a water bath not a Bunsen burner - This is a safety procedure, ethanol is flammable.
Put the leaf into boiling ethanol for a few minutes, - This removes the chlorophyll from the leaf so any colour change is easily seen
Dip the leaf into boiling water - This rinses off the ethanol and softens the leaf
Put the leaf on a white tile and add a few dips of iodine - This is the test for starch, If it turns yellow brown to blue/black the starch is present in the leaf
What is the experiment to test if chlorophyll is needed for photosynthesis
Remove a small variegated leaf from, the plant
Put the leaf into a water bath
Put the leaf into a boiling tube half full of ethanol and place in the water bath until all green colour is removed
Remove leaf from ethanol using forceps and dip it into the water bath
Remove the leaf from ethanol and dip into water bath
Spread leaf onto white tile
Add a few drops of iodine solution to the leaf to test for presence of starch
DRAW A PICTURE OF THE LEAF TO SHOW WHERE OR IF STARCH IS PRESENT (PG 43)
DRAW A PICTURE OF THE LEAF TO SHOW WHERE OR IF STARCH IS PRESENT (PG 43)
How do you destarch a plant
placing it in the dark for at least 48 hours. During this time any starch will be removed or used.
