G 11 Ch 2 (2.1.5+2.1.6) Set A

Which of the following is correct concerning an RNA molecule?

• It contains the sugar ribose.

• It may contain uracil as a nitrogen-containing base.

• It contains a phosphate molecule.

• All of these are correct.

The nature of an enzyme is ______.

• Carbohydrate

• Protein

• Lipid

• Vitamin

In RNA, thymine is replaced by ________.

• adenine

• cytosine

• uracil

• guanine

The protein part of enzyme is known as ________.

• holoenzyme

• apoenzyme

• isoenzyme

• all of these

The basic unit of nucleic acid is _______.

 

• pentose sugar

• nucleoid

• nucleoside

• nucleotide

An organic substance bound to an enzyme and essential for its activity is called _________.

• co-enzyme

• holoenzyme

• apoenzyme

• isoenzyme

Identify the purine base of nucleic acids in the following.

• Cytosine

• Thymine

• Uracil

• Adenine

A nucleotide is formed of _______.

• purine, pyrimidine and phosphate

• purine, sugar and phosphate

• nitrogen base, sugar and phosphate

• pyrimidine, sugar and phosphate

Fat is hydrolysed by the enzyme known as _________.

• Amylase

• Lipase

• Surcease

• Maltase

Which of the following is the pyrimidine bases found in DNA?

• Uracil and Thymine

• Thymine and Cytosine

• Adenine and Thymine

• Cytosine and Uracil