Standard Books Chemistry Biomolecules Class 12 Questions

Identify the basic amino acid from the following.

The general formula of carbohydrates is

The two functional groups characteristic of sugars are

Cellulose is a

A typical fat molecule is made up of

Benedict's solution is used to identify

Which one of the following biomolecules is correctly characterized?

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

The acid used for preliminary separation of biomolecule in a living tissue is

The given structures (I) and (II) represent configuration of the simplest sugar glyceraldehyde. Which of the following statements is not correct for the structures?

CHO |
H — C — OH |
CH₂OH (I)

CHO |
HO — C — H |
CH₂OH (II)

How many C-atoms are there in a pyranose ring?

Amino acids are mostly synthesised from

On oxidation with a mild oxidising agent like Br₂/H₂O, the glucose is oxidised to

Which one of the following statements is wrong?

The sum total of all the chemical reactions occurring in our body is known as

Which of the following are not polymeric?

Select the incorrect statement.

Identify the substances having glycosidic bond and peptide bond, respectively in their structure.

Which of the following biomolecules does have a phosphodiester bond?

Among the naturally occurring carbohydrates, furanose ring is found in the

Which one of the following sets of monosaccharides forms sucrose?

What are the hydrolysis products of lactose?

Which of the following statements is not true?

It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust) are similar in the sense that all the major elements are present in both. Then what would be the difference between these two groups choose a correct answer from among the following

The glycosidic linkage involved in linking the glucose units in amylose part of starch is

Match the following and choose the correct combination from the options given

Which of the following is not true about amino acids?

Which one of the amino acids can be synthesised in the body?

Mark the incorrect match.

Formation of both peptide and glycosidic bonds involves

Which of the following is basic amino acid?

Amino acids generally exist in the form of Zwitter ions. This means they contain

Which of the following represents a peptide chain?

Mark the incorrect example.

Secondary structure of protein refers to

Proteins are condensation polymers of

Most common types of secondary structures of proteins are

Which of the following statements is true for proteins?

On boiling the egg, what structural changes are taking place in the egg white?

A nucleoside on hydrolysis gives

Which of the following polymers is stored in the liver of animals?

Which of the following statements is incorrect?

Which one given below is a non-reducing sugar?

Maltose is made of the units

D(+)-glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be

Which of the following carbohydrates rotates the plane polarized light to the left?

Which of the following is a reducing sugar?

The non-essential amino acid among the following is

Which of the following sets of amino acids contains only essential amino acids?

In a protein molecule various amino acids are linked together by