Rice is deficient in :

• lysine

• alanine

• glycine

• leucine

Mutarotation does not occur in :

• sucrose

• D-glucose

• L-glucose

• None of these

Glucose has following functional group :

• aldehyde

• aldehyde and alcohol

• alcohol

• ketone and alcohol

Which of the following is a non-reducing sugar?

• Sucrose

• Maltose

• Lactose

• Mannose

555.

Invert sugar is a mixture of :

• glucose and fructose

• glucose and lactose

• glucose and galactose

• only glucose

Assertion : All enzymes are made up of proteins and all proteins have three dimensional structures.

Reason : Secondary structures of protein are sequence of amino acids.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which enzyme converts glucose to ethanol ?

• Diastase

• Invertase

• Zymase

• Both (b) and (c)

In the above sequence , II is :

• $\mathrm{\beta }$ - alanine

• $\mathrm{\alpha }$ - alanine

• ethylene diamine

• $\mathrm{\gamma }$ - amino butyric acid

The main constituent of most natural fibres is :

• starch

• glycol

• cellulose

• caprolactum

The type of bond that is most important in maintaining secondary structure of a protein is :

• disulphide bridges

• hydrogen bonding within the backbone

• hydrogen bonding between R group

• salt bridges