Aerobic and anaerobic

Question 1

WHAT IS RESPIRATION?

Answer 1

The chemical process by which energy in food is made available to cells.
This food is usually the sugar, glucose.

Question 2

AEROBIC RESPIRATION

Answer 2

When OXYGEN is used to completely breakdown glucose, this is called AEROBIC RESPIRATION.

Question 3

formula for aerobic

Answer 3

The chemical equation is:
C6H1206 + 6O2 🡪 6CO2 + 6H20 + 38ATP

glucose oxygen carbon water energy dioxide

Question 4

where does aerobic respiration occur?

Answer 4

Occurs in mitochondria of cells

Question 5

what does aerobic respiration produce

Answer 5

Produces a lot of energy (38 molecules of ATP) for every glucose molecule oxidized (broken down by reaction with oxygen). Oxygen needed for this process is obtained via breathing in humans.

Question 6

ANAEROBIC RESPIRATION

Answer 6

This type of respiration does not use oxygen to break down glucose.

Glucose is only partially broken down (unlike in aerobic respiration) and therefore releases less energy (2 ATP) than aerobic respiration.

Question 7

Where does anaerobic respiration occur

Answer 7

Anaerobic respiration can take place in muscle cells in humans, in yeast cells and in other organisms such as bacteria.

Question 8

ANAEROBIC RESPIRATION IN YEAST
The chemical equation is:

Answer 8

C6H12O6 🡪 2CH3CH2OH + 2CO2 ­+ 2ATP

glucose ethanol carbon dioxide energy
Since alcohol is formed, this process is called ALCOHOLIC FERMENTATION.

Question 9

ANAEROBIC RESPIRATION IN MUSCLE

Answer 9

C6H12O6 🡪 2C3H6O3 + 2ATP
glucose lactic acid energy
Since lactic acid is formed, this is called LACTIC ACID FERMENTATION.

Question 10

Lactic acid fermentation only occurs if…

Answer 10

there is not enough oxygen to facilitate aerobic respiration. Therefore, anaerobic respiration occurs when the person is exercising or engaging in a level of physical activity that require more energy than can be supplied by aerobic respiration alone.

Question 11

When this occurs, lactic acid builds up in the muscle cells and causes…

Answer 11

FATIGUE.

Question 12

describe oxygen debt

Answer 12

Oxygen is needed to break down the lactic acid in cells. The amount of oxygen needed to remove the lactic acid build up is called the OXYGEN DEBT.

Question 13

uses of fermentation

Answer 13

bread, yoghurt and alcohol such as wine and beer.

Question 14

What is respiration

Answer 14

Respiration is the chemical process whereby energy is made available from food(glucose).

Question 15

what is respiration energy used for

Answer 15

This energy is used by cells to carry out daily activities needed to survive.

Question 16

Aerobic respiration involves

Answer 16

the oxidation of glucose to produce water, carbon dioxide and energy in the form of
ATP.

Question 17

Anaerobic respiration involves

Answer 17

the incomplete breakdown of glucose into lactic acid in the case of muscle or ethanol
and carbon dioxide in the case of yeast.