EXAM - Photosynthesis & Food Chains

Question 1

LABEL ALL THE STRUCTURES OF THE PLANT CELL

Answer 1

LABEL ALL THE STRUCTURES OF THE PLANT CELL

Question 2

Cell membrane function

Answer 2

Let’s substances in and out of the cell

Question 3

Nucleus function

Answer 3

Controls the cell and holds set of instructions needed to make new cells

Question 4

Cytoplasm function

Answer 4

Cell reactions happen here

Question 5

Cell wall function

Answer 5

Helps the plant keep it’s shape

Question 6

Chloroplast function

Answer 6

Contains chlorophyll, a green pigment that traps light and converts it into food during a reaction called photosynthesis

Question 7

Vacuole function

Answer 7

Holds fluid called sap

Question 8

Label the diagram of a monocular microscope

Answer 8

Label the diagram of a monocular microscope

Question 9

Making a leaf peel

Answer 9

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

Question 10

MAKE A DRAWING OF CELLS VIEWED UNDER THE MONOCULAR MICROSCOPE

Answer 10

MAKE A DRAWING OF CELLS VIEWED UNDER THE MONOCULAR MICROSCOPE

Question 11

What is the importance of photosynthesis

Answer 11

It is a chemical reaction and plants need it to make food

Question 12

State the word equation for photosynthesis

Answer 12

Carbon Dioxide + Water —-> Glucose + Oxygen

Question 13

The part of a plant where photosynthesis takes place

Answer 13

The leaf

Question 14

What is chlorophyll

Answer 14

chlorophyll, a green pigment that traps light and converts it into food during a reaction called photosynthesis

Question 15

The two raw materials for photosynthesis are

Answer 15

Water and Carbon Dioxide

Question 16

How do water and carbon dioxide enter the leaf

Answer 16

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.

Question 17

What are the two products of photosynthesis

Answer 17

Water & Carbon Dioxide

Question 18

What happens to water and Carbon Dioxide for photosynthesis

Answer 18

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.

Question 19

Recall the steps for testing a leaf for starch and no why the steps are required

Answer 19

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

Question 20

What is the experiment to test if chlorophyll is needed for photosynthesis

Answer 20

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

Question 21

DRAW A PICTURE OF THE LEAF TO SHOW WHERE OR IF STARCH IS PRESENT (PG 43)

Answer 21

DRAW A PICTURE OF THE LEAF TO SHOW WHERE OR IF STARCH IS PRESENT (PG 43)

Question 22

How do you destarch a plant

Answer 22

placing it in the dark for at least 48 hours. During this time any starch will be removed or used.