SCIENCE
RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Respiration that requires Oxygen to be present
|
|
|
Respiration that does NOT require Oxygen to be present
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen.
Detailed explanation-2: -When oxygen is not present or if an organism is not able to undergo aerobic respiration, pyruvate will undergo a process called fermentation. Fermentation does not require oxygen and is therefore anaerobic. Fermentation will replenish NAD+ from the NADH + H+ produced in glycolysis.
Detailed explanation-3: -Anaerobic respiration is a type of respiration where oxygen is not used; instead, organic or inorganic molecules are used as final electron acceptors.
Detailed explanation-4: -Anaerobic respiration only involves glycolysis. This step produces 2 ATPs and does not need any oxygen. The electron transport chain needs oxygen. Since anaerobic respiration only involves glycolysis (which is an anaerobic step itself) it does not need oxygen.
Detailed explanation-5: -Glycolysis (see “Glycolysis” concept) is an anaerobic process-it does not need oxygen to proceed. This process produces a minimal amount of ATP.