Which of the following elements is present in very less quantity in the body?

(1) K             

(2) Ca

(3) Mg           

(4) Cu

In a normal adult, ascending order of concentration of following molecules is

(1)  Na>K>Fe>Cu         

(2) Na>K>Cu>Fe

(3) Fe>Na>K>Cu             

(4) Na>Fe>K>Cu

Which of the following is true?

1. All the elements present in a sample of earth’s crust are also present in a sample of living tissue

2. Carbon and Hydrogen are  present in more amount in any living organism than earth’s crust.

3. Carbon and Hydrogen are present in more in living organisms than in non living matter.

4. All of the above

Which of the following element is present in negligible amount in human body?
1. Magnesium
2. Suphur
3. Silicon
4. Sodium

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

When chemical analysis of living tissue was done  using trichloroacetic acid, then then filtrate formed was

1.acid insoluble fraction

2.acid soluble fraction

3.retentate

4.Both 1 and 3

In amino acid is a

1. Substituted methane

2. Substituted ethane

3. Any acid having amino group

4. Derivative of indoacetic acid

The unique properties of each amino acid are determined by its particular:

1. R group

2. Amino group

3. Kinds of peptide bonds

4. Number of bonds to other amino acids 

All of the following are nucleosides, except:

The zwitterion is shown by:

1. Only A

2. Only B

3. Both A and C

4. A, B and C