Given below are two statements: 

Assertion (A):	β -Glycosidic linkage is present in maltose.
Reason (R):	Maltose is composed of two glucose units in which C1 of one glucose unit is linked to C4 of another glucose unit.

    

1.	(A) and (R) both are correct statements and (R) explain the (A).
2.	(A) and (R) both are correct statements but (R) does not explain (A).
3.	(A) is the correct statement and (R) is the wrong statement.
4.	(A) is the wrong statement and (R) is the correct statement.

Carbohydrates are useful for plants:

1. To build cell membrane.

2. To support structure.

3. To serve as a storage molecule.

4. To help in the transport mechanism.

Consider the following compounds: 

Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose

The number of disaccharide carbohydrates is/are:

The main component present in starch and glycogen is:
1. Amylose
2. Glycose
3. Amylopectin
4. Cellulose

D-Glucose  \(\xrightarrow[]{\textbf{?}}\) Saccharic acid

The oxidizing reagent used for this conversion is:
1. HI
2. Bromine water
3. HNO₃ 
4. H₂SO₄

The open structure of glucose cannot be established by:

1. HCN

2. Schiff’s test

3. Hydroxylamine test

4. Reaction with HI

The incorrect statement about nucleic acid is:

The correct statement about RNA is :

The essential amino acid is/are-
1. Valine
2. Alanine
3. Serine
4. All of the above

The enzyme used for the above conversion is:
\(C_{12}H_{22}O_{11}\ \xrightarrow[H_2O]{?}\ \text{2 mole of glucose}\)

1. Amylase
2. Lactase
3. Maltase
4. Peptidase