B4.2

Question 1

Word equation for Photosynthesis

Answer 1

Carbon dioxide + water — (light energy)—->glucose + oxygen

Question 2

Symbol equation for photosynthesis

Answer 2

6CO2+6H20—–>C6H12O6+ 6O2

Question 3

What are the main Stages Of Photosynthesis?

3 points

Answer 3

• light energy is absorbed by the green chemical chlorophyll
• energy is used to bring about the reaction between carbon dioxide and water to produce glucose
• oxygen is produced as a waste product

Question 4

Glucose may be:

3 points

Answer 4

• Converted into chemicals needed for growth in plant cells (cellulose,protein,chlorophyll)
• converted into starch for storage
• used in respiration to release energy

Question 5

What are minerals taken up by plant roots used to make?

Answer 5

Some chemicals needed by cells including nitrogen from nitrates to make proteins

Question 6

What is diffusion?

Answer 6

The passive overall movement of molecules from a region of their higher concentration to a region of their lower concentration

Question 7

The movement of what occurs by diffusion?

Answer 7

Oxygen and carbon dioxide in and out of leaves during Photosynthesis

Question 8

What is osmosis a specific case of?

Answer 8

Diffusion

Question 9

What is osmosis?

Answer 9

The overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane

Question 10

The movement of what occurs by osmosis?

Answer 10

Water into plant roots

Question 11

What is active transport?

Answer 11

The overall movement of chemicals across a cell membrane requiring energy from respiration

Question 12

What is active transport used in?

Answer 12

The absorption of nitrates by plant roots

Question 13

What may the rate of photosynthesis he limited by?

Answer 13

• temperature
• light intensity
• carbon dioxide

Question 14

What could you use to investigate the effect of lights on plants?

Answer 14

Using a light meter
•using a quadrat
•using an identification key

Question 15

Light meter measures…?

What are it’s units?

Answer 15

The amount of light hitting a leaf
Units= lux
Hold equipment at ground level and take a reading over long period of time

Question 16

Identification key

Answer 16

Enables Rapid identification of plants by asking questions such as “does the plant have parallel lines in its leaves?”

Question 17

Quadrats

Answer 17

Square shapes-plants that fall into given area are counted

Question 18

Photosynthesis limitation-temperature

Answer 18

Below 37 degrees- Photosynthesis stops until temp rises again

Above 40- enzymes stop working permanently (denature)

Question 19

Photosynthesis limiting factor-light intensity

Answer 19

Light is needed for photosynthesis

Greater availability of light-quicker Photosynthesis will take place

Question 20

Photosynthesis limitation-carbon dioxide concentration

Answer 20

As it increases,rate of photosynthesis increases

Question 21

What is a transect?

Answer 21

A line across a habitat

Question 22

How do you take a transect?

Answer 22

String/rope placed in a line on the ground.

The number of organisms of each species along a transect can be observed and recorded at regular intervals

Question 23

Once the enzyme and molecule are linked…what happens?

Answer 23

The reaction takes place,the produces are released and the process is able to start again.

Question 24

What is stomata?

Answer 24

Small holes on the underside of a leaf

Question 25

Protein is made up of what?

Answer 25

Different amino acid molecules,which themselves were made From Glucose

Question 26

What are proteins vital for?

Answer 26

Growth and repair