What is the difference between anaerobic and aerobic respiration

Aerobic respiration is respiration in the presence of oxygen, and anaerobic respiration is when no oxygen is present.

In aerobic respiration, carbon dioxide is produced. In anaerobic respiration, lactate is produced in muscles of mammals, and ethanol is produced in organisms such as yeasts.

1. Aerobic respiration occurs in the presence of O2 while anaerobic in the absence of O2.
2. In both type of respiration the substrate (starting substance) involved is glucose only.
3. The amount of energy provided will be more in aerobic respiration than in anaerobic. The reason for this is the glucose molecules are completely broken down in aerobic respiration whereas in anaerobic respiration glucose molecules are partially broken down because of non-availability of O2 in anaerobes. 38 ATP energy rich molecules are produced for each of the glucose molecule broken down in aerobic respiration while only 2 ATP molecules in anaerobic respiration.
4. A part of the aerobic respiration occurs in cytoplasm of the cell without the need of O2 and the remaining part occurs in mitochondria with the help of O2 while anaerobic respiration occurs only in the cytoplasm of the cell without the help of O2.

Both starts off with glycolysis:

Glucose --› Pyruvate + ATP


Anaerobic doesn't use oxygen:

Pyruvate --› Lactate (Lactic acid) + heat + ATP


Aerobic uses oxygen and goes through this complicated process (link reaction, kreb cycle, electron transport system, etc):

Pyruvate --› ATP (a lot more than the two above) + CO2 + H2O + heat

anaerobic respiration is without oxygen n takes place in the cytoplasm and aerobic respiration is with oxygen and takes place in the mitochondria.

aerobic requires oxygen and anaerobic does not.