Biology
Which of the following may cause the breakdown of pyruvate into lactic acid in our muscles?

Lack of nitrogen
Lack of carbon dioxide
Lack of Oxygen
Lack of water

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Biology
The main result of aerobic respiration is the

Production of ATP from the breakdown of glucose
Production of lactic acid as an end product
Storage of energy in a polysaccharide
Conversion of radiant energy into chemical energy

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Biology
Normal adult human male has

10 gram of haemoglobin/100 gram of blood
24 gram of haemoglobin/100 gram of blood
18 gram of haemoglobin/100 gram of blood
14 gram of haemoglobin/100 gram of blood

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