Plants and Photosynthesis

Question 1

What is the equation for photosynthesis?

Answer 1

carbon dioxide + water (+sunlight) –> oxygen + glucose

Question 2

In which organelle does photosynthesis take place?

Answer 2

Chloroplasts

Question 3

What is the name of the green pigment, found in chloroplasts, that captures light energy?

Answer 3

Chlorophyll

Question 4

What is the plant organ called that carries out photosynthesis?

Answer 4

Leaf

Question 5

What are the single celled organisms called that share many of the characteristics of plants?

Answer 5

Algae

Question 6

Describe 2 ways that we can test to see if a leaf is photosynthesising

Answer 6

1. Test for Starch

2. Oxygen bubble test

Question 7

What is meant by the ‘rate’ of photosynthesis

Answer 7

The speed at which photosynthesis takes place

Question 8

Name 3 factors that affect the rate of photosynthesis

Answer 8

Any from: Light, Temperature, Carbon Dioxide (CO2), Water

Question 9

Why do farmers need to know what affects the rate of photosynthesis?

Answer 9

So that they can control it to get the most crops possible (high yield)

Question 10

If one of the factors that affect the rate photosynthesis is low we call it a…

Answer 10

Limiting Factor

Question 11

What are the limiting factors if there is a high level of carbon dioxide?

Answer 11

Light Intensity + Temperature + Water

Question 12

What is the name of the simple carbohydrate produced by plants during photosynthesis?

Answer 12

Glucose

Question 13

Carbohydrate is a source of ________ for plants to use over winter

Answer 13

Energy

Question 14

Name 5 things that plants use glucose for

Answer 14

1. Respiration (producing energy)
2. Making Cell walls
3. Making Starch
4. Making proteins
5. Making oil to store in seeds

Question 15

Spare glucose is mainly stored by plants as…

Answer 15

Starch

Question 16

Glucose is mainly useful for all living cells because…

Answer 16

It can be used by living organisms to carry out respiration

Question 17

Cell walls are mainly made from…

Answer 17

Cellulose

Question 18

Cellulose is made from long chains of _____ molecules

Answer 18

Glucose

Question 19

What is the equation for Respiration?

Answer 19

Glucose + Oxygen –> Carbon Dioxide + Water + Energy

Question 20

What is Respiration?

Answer 20

Respiration is a chemical reaction carried out in the mitochondria of all living cells to release energy from glucose

Question 21

What can we grow plants in that helps us to control their growth conditions?

Answer 21

Greenhouse or polytunnels

Question 22

The more a plant carries out photosynthesis the more it will…

Answer 22

Grow

Question 23

By controlling the environment of plants we can increase the…

Answer 23

Yield (amount) of crops produced

Question 24

How can we increase the amount of light available to a plant? Give a disadvantage of this method

Answer 24

Artificial Lighting

A disadvantage is that it is expensive

Question 25

How can we increase the amount of carbon dioxide available to a plant?

Answer 25

Use a propane burner Disadvantages- contributes towards global warming, expensive.

Question 26

How can we increase the temperature for a plant? Give a disadvantage of this method

Answer 26

Heaters or boilers Disadvantages - expensive

Question 27

Which metal ion is needed to make chlorophyll?

Answer 27

Magnesium ions (Mg2+)

Question 28

How to plants make amino acids?

Answer 28

They combine nitrates from the soil with glucose

Question 29

What are amino acids used for?

Answer 29

The building blocks of proteins.

Question 30

A plant lacking in protein will have...

Answer 30

poor growth as protein is needed for growth and repair.

Question 31

A plant lacking in magnesium (Mg) will have...

Answer 31

yellow leaves because magnesium from soil is needed to make the green pigment chlorophyll.