Photosynthesis

Question 1

Where are chromosomes found?

Answer 1

in the nucleus

Question 2

what do chromosomes carry?

Answer 2

genes, made of DNA

Question 3

what does DNA stand for?

Answer 3

Deoxyribonucleic Acid

Question 4

What type of cell division produces two identical cells ?

Answer 4

mitosis

Question 5

What is the name of cell division taking place in Bacteria?

Answer 5

binary fission

Question 6

what is the equation for photosynthesis ?

Answer 6

carbon dioxide + water = glucose + oxygen

Question 7

what are the three limiting factors in photosynthesis?

Answer 7

1. light intensity
2. carbon dioxide concentration
3. temperature

Question 8

what happens when the rate of photosynthesis increases? and light is the limiting factor?

Answer 8

amount of light energy increases

Question 9

what happens when the rate of photosynthesis stops increasing ?

Answer 9

something else becomes the limiting factor such as the temperature or CO2 concentration

Question 10

How do plants get energy to make glucose?

Answer 10

from photosynthesis

energy is absorbed by the leaf’s chloroplasts and react with carbon dioxide to produce oxygen and glucose

Question 11

Give four ways in which plants use the glucose they have made

Answer 11

1. to make starch
2. to make fat, oil, and lipids
3. to make amino acids/proteins/enzymes
4. to make cellulose for cell walls

Question 12

what happens to the rate of photosynthesis when the limiting factor is the temperature?

Answer 12

As the temperature increases, enzymes gain kinetic energy. They move faster and increase the rate of photosynthesis

Question 13

what happens when the rate of photosynthesis enzymes work at their fastest?

Answer 13

the temperature reaches the optimum temperature and the rate of photosynthesis is the highest.

Question 14

what happens when the rate of photosynthesis stops?

Answer 14

Enzymes get denatured so the active sites get denatured by changing shape

Question 15

Give two reasons why photosynthesis in plants is essential for the survival of animals

Answer 15

1. oxygen is released into the air for aerobic respiration of animals
2. plants photosynthesize to make glucose and starch
3. animals consume plants and take in the starch
4. This is then used for energy

Question 16

Describe how plants make starch from simple raw materials

Answer 16

glucose is made from carbon dioxide and water from photosynthesis.
plants build up glucose into small carbohydrates.
Excess glucose join up to to make starch so it does not dissolve in water . plants build up storage of starch