Which of the following statement(s) is (are) correct?

1. Pyruvate can be converted into ethanol and carbon dioxide by yeast

2. Fermentation takes place in aerobic bacteria

3. Fermentation takes place in mitochondria

4. Fermentation is a form of anaerobic respiration

Choose the forms in which most plants absorb nitrogen

1. Proteins

2. Nitrates and Nitrites

3. Urea

4. Atmospheric nitrogen

Which is the first enzyme to mix with food in the digestive tract?

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

Choose the correct path of urine in our body