aerobic respiration

Question 1

what is cellular respiration

Answer 1

the process in which glucose is broken down gradually in the presence of oxygen or in the absence of oxygen to release that is stored in ATP molecules

Question 2

what is the equation of aerobic respiration

Answer 2

C6H12O6 + 6O-2 –enzyme– 6CO-2 + 6H-2O + ATP

Question 3

aerobic respiration takes place in 3 stages what re they

Answer 3

Glycolysis - takes place in cytoplasm
Krebs cycle - takes place inside mitochondria
oxidative phosphorylation - tales place inside mitochondria

Question 4

What happens in Glycolysis

Answer 4

Glycolysis

• takes place outside the mitochondrion, in the cytoplasm of the cell

• no oxygen is required during this stage

•glucose is broken down into smaller molecules, releasing a small amount of energ that is stored in energy-rich ATP molecules

• releases high energy hydrogen ions (H) that are used in the third stage of cellular respiration (oxidative phosphorylation)

Question 5

What happens in kerbs cycle

Answer 5

Krebs Cycle

• can only take place if oxygen is present

• occurs inside of the mitochondrion

• releases carbon dioxide and high energy hydrogen ions (H*)

• transports hydrogen atoms to the third stage (oxidative phosphorylation) via hydrogen carrier enzymes

Question 6

What happens in oxidative phosphorylation

Answer 6

Oxidative Phosphorylation

• takes place inside of the mitochondrion and requires oxygen

° passes high energy hydrogen atoms from one hydrogen carrier enzyme to the next, releasing energy in the process

• uses released energy to combine a phosphate molecule to an ADP (Adenosine Di-phosphate) molecule to form ATP - called phosphorylation

• is represented in the formula: ADP + P - ATP

• oxygen acts as a final hydrogen acceptor binding with the hydrogen forming water which is released as a waste product of cellular respiration

Question 7

Anaerobic respiration takes place
What happens

Answer 7

•without oxygen being present
• it occurs for short periods of time, mainly during physical exercise
• occurs differently in plants and animals
• produces less ATP than aerobic respiration

Question 8

What is anaerobic respiration in plants and animals

Answer 8

Anaerobic respiration in animals is known as lactic acid fermentation and occurs in muscles during intense exercise

Anaerobic respiration in plants is known as alcoholic fermentation

Question 9

What are the uses of anaerobic respiration in the industry

Answer 9

•Yeast and other fungi respire anaerobically and are used to produce alcoholic beverages such as beer and wine.
• Yeast cells are also used to cause bread to rise during the baking process.
• The fermentation process is also used to produce cheese.

Question 10

What are the differences between aerobic and anaerobic

Answer 10

Aerobic
oxygen is required
products: carbon dioxide + water
occurs in the cytoplasm and mitochondria
large amount of ATP energy is released, glucose is completely broken down

Anaerobic
oxygen is not required
products: lactic acid (anim dioxide + alcohol (plants /)
occurs in the cytoplasm
small amount of ATP energy is released, glucose is only partially broken down