Untitled Deck

Question 1

What is the function of the cell wall in plant cells?

Answer 1

Strengthens the cell

Made of cellulose

Question 2

What do chloroplasts contain that is essential for photosynthesis?

Answer 2

Chlorophyll

Absorbs light for photosynthesis

Question 3

What is the role of the vacuole in plant cells?

Answer 3

Helps keep the cell firm

Filled with cell sap

Question 4

What controls the activities of a plant cell?

Answer 4

Nucleus

Question 5

Where do chemical reactions occur in a plant cell?

Answer 5

Cytoplasm

Question 6

What is the function of the cell membrane in plant cells?

Answer 6

Controls what enters and leaves the cell

Question 7

What is the function of mitochondria in plant cells?

Answer 7

Release energy from respiration

Question 8

What is the equation for photosynthesis?

Answer 8

carbon dioxide + water → glucose + oxygen

(CO₂ + H₂O → C₆H₁₂O₆ + O₂)

Question 9

What type of reaction is photosynthesis?

Answer 9

Endothermic

Question 10

Where does photosynthesis mainly occur in plants?

Answer 10

Leaves

Question 11

What are the limiting factors of photosynthesis?

Answer 11

• Light intensity
• Carbon dioxide concentration
• Temperature
• Amount of chlorophyll (if plant is unhealthy)

Question 12

What is the first step in testing a leaf for starch?

Answer 12

Boil the leaf (kills it)

Question 13

What happens to the leaf after it is boiled in the starch test?

Answer 13

Put in ethanol (removes chlorophyll)

Question 14

What color does iodine turn if starch is present?

Answer 14

Blue-black

Question 15

What are the uses of glucose in plants?

Answer 15

• Respiration
• Making cellulose
• Storing as starch
• Making fats and oils
• Making amino acids

Question 16

What is the equation for aerobic respiration in plants?

Answer 16

glucose + oxygen → carbon dioxide + water + energy

Question 17

Where does respiration occur in plant cells?

Answer 17

Mitochondria

Question 18

What does xylem transport?

Answer 18

Water and minerals from roots to leaves

Question 19

What type of cells make up xylem?

Answer 19

Dead cells, strengthened with lignin

Question 20

What is unique about the flow of xylem?

Answer 20

One-way only

Question 21

What does phloem transport?

Answer 21

Sugars (glucose) made in photosynthesis

Question 22

What type of cells make up phloem?

Answer 22

Living cells

Question 23

What is unique about the flow of phloem?

Answer 23

Two-way flow

Question 24

What is transpiration?

Answer 24

The loss of water vapour from the leaves

Question 25

What drives the movement of water up the plant during transpiration?

Answer 25

Water evaporates and exits through stomata

Question 26

What factors increase the rate of transpiration?

Answer 26

* Light * Temperature * Wind

Question 27

What factor decreases the rate of transpiration?

Answer 27

Humidity

Question 28

What are stomata?

Answer 28

Tiny pores on the leaf surface

Question 29

What is the function of guard cells?

Answer 29

Open/close stomata

Question 30

What happens to stomata in light conditions?

Answer 30

Open to let in CO₂

Question 31

What happens to stomata in dark or dry conditions?

Answer 31

Close to reduce water loss

Question 32

What is the independent variable in the required practical for the effect of light on photosynthesis?

Answer 32

Light distance/intensity

Question 33

What is the dependent variable in the required practical for the effect of light on photosynthesis?

Answer 33

Rate of photosynthesis (bubbles per minute)

Question 34

What are control variables in the required practical for the effect of light on photosynthesis?

Answer 34

* Temperature * CO₂ levels * Same plant