Which one is not a D-sugar?

1.		2.
3.		4.

The RBC deficiency is a deficiency disease of:

Sucrose on hydrolysis gives:

1. $\mathrm{\alpha }$-D-Glucose + $\mathrm{\beta }$-D-Glucose

2. $\mathrm{\alpha }$-D-Glucose + $\mathrm{\beta }$-D-Fructose

3. $\mathrm{\alpha }$-D-Fructose + $\mathrm{\beta }$-D-Fructose

4. $\mathrm{\beta }$-D-Glucose + $\mathrm{\alpha }$-D-Fructose

Which of the following metal ions activates many enzymes participating in the oxidation of glucose to produce ATP and with Na it is also responsible for the transmission of nerve signals:

1. Copper

2. Calcium

3. Potassium

4. Iron

Which of the following is a basic amino acid?

1. Alanine

2. Tyrosine

3. Lysine

4. Serine 

The reaction of concentrated sulphuric acid with carbohydrates (C₁₂H₂₂O₁₁) is an example of:

Deficiency of which vitamin causes osteomalacia ?