Which of the following elements is present in higher proportion [% weight of the total] in Earth's crust with respect to the average composition of a human body?

1. Carbon

2. Nitrogen

3. Sulfur

4. Magnesium

Identify the amino acid with hydroxymethyl as its R group:

1. Glycine

2. Alanine

3. Serine

4. Phenylalanine

All the following are nucleosides except:

1. Adenosine

2. Cytosine

3. Guanosine

4. Uridine

Which of the following secondary metabolites is an anticancer drug?

1.  Vinblastin

2.  Concanavalin A

3.  Abrin

4.  Ricin

Identify the incorrect statement regarding the structure of proteins:

1. They are heteropolymers containing strings of amino acids.

2. The first amino acid in the primary structure is the N-terminus amino acid

3. Only left helices are observed in proteins

4. Tertiary structure is absolutely essential for many biologic functions of the proteins

At each step of its ascent, the DNA strand turns:

1. 3.4$°$

2. 34$°$

4. 3.6$°$

4. 36$°$

The blood concentration [in mM] of glucose in a normal healthy individual is:

1.  4.5$-$5.0

2.  5.0$-$5.5

3.  5.5$-$6.0

4.  6.0$-$6.5

The substrate has to go through a much higher energy state or transition state in case of:

1. Exothermic reactions only

2. Endothermic reactions only

3. Both exothermic and endothermic reactions

4. Neither exothermic nor endothermic reactions

When the co-factor is removed from the enzyme, the catalytic activity:

1. is lost.

2. is reduced.

3. is increased.

4. is unaffected.