Mark the incorrect option.

Important Questions on Chemical Constituents of Living Cells

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Optical activity of DNA is due to its:

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

How many different proteins consisting of 100 amino acids can be formed from 20 different amino acids?

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?

HARD

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

The activity of a certain protein is dependent on its phosphorylation. A mutation in its gene changed a single amino acid which affected the function of the molecule. Which amino acid change is most likely to account for this observation?

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Match List-$\mathrm{I}$ with List-$\mathrm{II}$

List-$\mathrm{I}$ (Biological Molecules)		List-$\mathrm{II}$ (Biological functions)
(a)	Glycogen	(i)	Hormone
(b)	Globulin	(ii)	Biocatalyst
(c)	Steroids	(iii)	Antibody
(d)	Thrombin	(iv)	Storage product

Choose the correct answer from the options given below:

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which of the following amino acids is NOT involved in gluconeogenesis?

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Choose the CORRECT combination of statements given below related to cysteine residue in proteins.

i. Cysteine can be linked to tyrosine by S-O bond.

ii. Cysteine can be linked to another cysteine by S-S bond.

iii. Cysteine can complex with ${\mathrm{Z}\mathrm{n}}^{2+}.$

iv. Cysteine can be linked to methionine by S-S bond

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which of the following is not polymeric?

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which one of the following statements is wrong?

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

In a protein molecule various amino acids are linked together by:

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Phospholipids are formed by the esterification of:

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which one of the following pairs of molecules never forms a hydrogen bond between them?

HARD

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which one of the following techniques is used for the detection of proteins?

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

A $25000 \mathrm{Da}$ protein contains a single binding site for a molecule (ligand), whose molecular weight is $2500 \mathrm{Da}$. Assuming high affinity and physiologically irreversible binding the amount of the ligand required to occupy all the binding sites in $10 \mathrm{mg}$ protein will be:

HARD

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Two tubes labelled 'P' and 'Q' contain foodstuff. Tube 'P' gave a positive test with Benedict's solution while tube 'Q' gave a positive test with nitric acid. Which of the following is correct?

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

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

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Concanavalin A is:

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

The Fischer presentation of D-glucose is given below



The correct structure(s) of $\mathrm{\beta }-\mathrm{L}-$ glucopyranose is(are)

EASY

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

Which of the following are not secondary metabolites in plants?

MEDIUM

Biology>Cell : Structure and Functions>Chemical Constituents of Living Cells>Biomolecules

How are vitamins classified ? Name the vitamin responsible for the coagulation of blood.