Biomolecules

The incorrect statement from the following with respect to carbohydrates is :

1. All monosaccharides are reducing sugars.
2. The monosaccharide units obtained from hydrolysis of oligosaccharides are always the same.
3. Starch and cellulose are typical examples of polysaccharides, which are very high molecular weight compounds of more than ten monosaccharide units.
4. Open chain and cyclic structures co-exist at equilibrium that are responsible for certain properties as in the case of D-(+)-glucose.

Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?

1. Threonine
2. Serine
3. Tyrosine
4. Cysteine

Match the List-I with List-II

1. A-I, B-III, C-II, D-IV
2. A-I, B-III, C-IV, D-II
3. A-III, B-I, C-IV, D-II
4. A-III, B-I, C-II, D-IV

Match the List-I with List-II

1. A-IV, B-II, C-I, D-III
2. A-IV, B-I, C-II, D-III
3. A-III, B-II, C-I, D-IV
4. A-IV, B-I, C-III, D-II

Consider the following reactions. Total number of electrons in the π bonds and lone pair of electrons in the product (X) is : [figure]

1. 12
2. 16
3. 14
4. 18

Identify the correct statements. Choose the correct answer from the options given below :

1. A and B Only
2. B and C Only
3. A, B and D Only
4. A, B and E Only

Identify the incorrect statement about tertiary structure of proteins.

1. They can be fibrous or globular in structure.
2. The main forces that stabilize the structure are hydrogen bonding, disulphide links, van der Waals and electrostatic forces of attraction.
3. The structure remains intact when exposed to pH changes.
4. A linear polypeptide chain will convert to a secondary structure and then further folding of the secondary structure will convert to tertiary structure.

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Match the List-I with List-II Choose the correct answer from the options given below :

1. A-II, B-I, C-IV, D-III
2. A-IV, B-III, C-II, D-I
3. A-III, B-IV, C-I, D-II
4. A-II, B-IV, C-I, D-III