B8 and B9 Revision

Question 1

Limiting factor

Answer 1

This is a factor that limits the rates of photosynthesis.

Question 2

How are leaves adapted for photosynthesis

Answer 2

. They are broad giving them a big surface area for light to fall on.
. They are very thin as they make diffusion easier.

Question 3

What is c02 for

Answer 3

C02 diffuses in from the air via the stomata.

Question 4

Where does water come from in plant

Answer 4

Water comes from the roots in the xylem via the transpiration stream.

Question 5

What does the oxygen do

Answer 5

Oxygen is for respiration in the plant.

Question 6

Photosynthesis def

Answer 6

Light energy is harnessed by the chloroplasts. The light energy is used to convert carbon and water into glucose. This essentially converts light energy into chemical energy in the form of the glucose. Oxygen is released as a by-product. Because this requires an input of energy, it is classed as an exothermic reaction.

Question 7

What is aerobic respiration?

Answer 7

Aerobic respiration is the process by which oxygen-breathing creatures which turn fuels, such as fats and sugars into energy.

Question 8

Why is aerobic respiration important?

Answer 8

It is important because the energy produced is used to preform a load of functions in the body and different types of reactions. Also the energy is used to build new molecules.

Question 9

Where does aerobic respiration take place?

Answer 9

The mitochondria

Question 10

What is anaerobic respiration?

Answer 10

Unlike aerobic respiration, anaerobic does not need oxygen. It is the release of a relatively small amount of energy in cells by the breakdown of food substances in the absence of oxygen.

Question 11

Why does anaerobic respiration happen?

Answer 11

Anaerobic respiration happens in muscles during hard exercise.

Question 12

What are the effects of anaerobic respiration?

Answer 12

It produces lactic acid, rather than carbon dioxide and water and this can lead to painful muscle cramps.

Question 13

Where does anaerobic respiration occur in plants?

Answer 13

Its occurs in the cytoplasm of the plant.

Question 14

Anaerobic respiration in bacteria?

Answer 14

The group of archaea called methanogens reduces carbon dioxide to methane to oxidize NADH which are bacteria use it.

Question 15

Anaerobic respiration in yeast

Answer 15

It used during brewing and bread making.

Question 16

What is metabolism?

Answer 16

It is the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.

Question 17

What is the role of the line in aiding recovery while I after respiring anaerobically?

Answer 17

Liver converts lactic acid back to glucose which needs oxygen