General
✓✗Flavonoids, alkaloids, rubber, essential oils, antibiotics, coloured pigments, scents, gums and spices are all
- primary metabolites
- macromolecules of the acid-insoluble pool
- secondary metabolites
- enzymes
General
✓✗Identify the incorrect pair.
- Lectins - Concanavalin A
- Drugs - Ricin
- Toxin - Abrin
- Alkaloids - Codeine
General
✓✗The process of shutting off enzyme activity by binding of a chemical is called
- denaturation
- hydrolysis
- activation
- inhibition
General
✓✗Which of the following correctly matches a reaction type with an example from NCERT?
- Physical process - formation of carbonic acid
- Physical change - hydrolysis of starch into glucose
- Organic chemical reaction - melting of ice
- Inorganic chemical reaction - Ba(OH)2 + H2SO4 -> BaSO4 + 2H2O
General
✓✗Match the macromolecule with the bond linking its monomers.
Choose the correct answer from the options given below.
| Macromolecule | Bond |
| P. Protein | (i) Phosphodiester bond |
| Q. Polysaccharide | (ii) Ester bond |
| R. Nucleic acid | (iii) Peptide bond |
| S. Triglyceride | (iv) Glycosidic bond |
- P-(iv), Q-(iii), R-(i), S-(ii)
- P-(iii), Q-(iv), R-(i), S-(ii)
- P-(iii), Q-(i), R-(iv), S-(ii)
- P-(i), Q-(iv), R-(iii), S-(ii)
General
✓✗Which of the following is NOT one of the functions of proteins listed in NCERT?
- Fighting infectious organisms
- Acting as hormones and enzymes
- Forming the genetic code
- Transporting nutrients across the cell membrane
General
✓✗Enzymes that catalyse the inter-conversion of optical, geometric or positional isomers are
- hydrolases
- ligases
- transferases
- isomerases
General
✓✗Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these
- enhance oxidative metabolism
- are conjugated proteins
- help in regulating metabolism
- are exclusively synthesised in the body of a living organism
General
✓✗In the line representation of a protein, the left end represents the
- first amino acid, called the N-terminal amino acid
- last amino acid, called the C-terminal amino acid
- last amino acid, called the N-terminal amino acid
- first amino acid, called the C-terminal amino acid
General
✓✗Activity of an enzyme above and below its optimum temperature
- declines
- keeps increasing
- remains constant
- doubles
General
✓✗Which of the following statements about lipids are correct?
A. Fatty acids may be saturated or unsaturated.
B. Glycerol is trihydroxy propane.
C. Arachidonic acid has 16 carbon atoms.
D. Lecithin is a phospholipid.
E. All lipids are strictly macromolecules.
Choose the correct answer from the options given below.
A. Fatty acids may be saturated or unsaturated.
B. Glycerol is trihydroxy propane.
C. Arachidonic acid has 16 carbon atoms.
D. Lecithin is a phospholipid.
E. All lipids are strictly macromolecules.
Choose the correct answer from the options given below.
- A, B and D only
- B, C and E only
- A, B, D and E only
- A, C and D only
General
✓✗A multistep chemical reaction in which each step is catalysed by the same or different enzyme complexes is called a
- transition state
- metabolic pathway
- zwitterion
- physical process
General
✓✗The thousands of organic compounds found in the filtrate of a tissue ground in trichloroacetic acid form the
- acid-insoluble fraction
- acid-soluble pool
- membrane fraction
- ash fraction
General
✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Proteins are heteropolymers.
Reason (R): Proteins are made of 20 different types of amino acids.
In the light of the above statements, choose the correct answer from the options given below.
Assertion (A): Proteins are heteropolymers.
Reason (R): Proteins are made of 20 different types of amino acids.
In the light of the above statements, choose the correct answer from the options given below.
- (A) is true but (R) is false.
- (A) is false but (R) is true.
- Both (A) and (R) are true and (R) is the correct explanation of (A).
- Both (A) and (R) are true but (R) is not the correct explanation of (A).
General
✓✗The chemical and physical properties of amino acids are essentially due to the
- number of carbon atoms in the chain only
- sugar component in them
- phosphate group attached to them
- amino, carboxyl and R functional groups