General
✓✗Arrange the steps of the catalytic cycle in the correct order.
A. Enzyme releases the products
B. Substrate binds to the active site
C. Active site breaks the chemical bonds of the substrate
D. Enzyme alters its shape to fit more tightly around the substrate
A. Enzyme releases the products
B. Substrate binds to the active site
C. Active site breaks the chemical bonds of the substrate
D. Enzyme alters its shape to fit more tightly around the substrate
- B, C, D, A
- B, D, C, A
- A, B, D, C
- D, B, C, A
General
✓✗The catalytically active enzyme together with its bound cofactor is called the
- coenzyme
- holoenzyme
- prosthetic group
- apoenzyme
General
✓✗Deoxyribose differs from ribose in that it
- is a six-carbon sugar instead of a five-carbon one
- has an extra phosphate group at the 5-prime carbon
- lacks an oxygen (hydroxyl) at the 2-prime carbon
- has no hydroxyl groups at any of its carbons
General
✓✗Low temperature
- preserves an enzyme in a temporarily inactive state
- converts an enzyme into a ribozyme
- increases enzyme activity indefinitely
- permanently denatures an enzyme
General
✓✗In the 3-dimensional view of a protein, the folding of the chain upon itself is maintained in its
- primary structure
- amino acid sequence only
- tertiary structure
- quaternary structure only
General
✓✗Curcumin belongs to which class of secondary metabolites?
- Alkaloids
- Lectins
- Toxins
- Drugs
General
✓✗Glycogen differs from cellulose in that glycogen
- is made of fructose
- cannot store energy
- is branched
- is found only in plants
General
✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Carbonic anhydrase increases the rate of formation of carbonic acid.
Reason (R): Carbonic anhydrase raises the activation energy of the reaction.
In the light of the above statements, choose the correct answer from the options given below.
Assertion (A): Carbonic anhydrase increases the rate of formation of carbonic acid.
Reason (R): Carbonic anhydrase raises the activation energy of the reaction.
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
General
✓✗The acid-soluble pool represents roughly the
- cell wall only
- cytoplasmic composition
- nuclear membrane only
- genetic material only
General
✓✗Enzymes that catalyse the inter-conversion of optical, geometric or positional isomers are
- hydrolases
- ligases
- transferases
- isomerases
General
✓✗Which of the following correctly lists proteins in the order: enzyme, hormone, ground substance, glucose transporter?
- Insulin, trypsin, collagen, GLUT-4
- GLUT-4, insulin, collagen, trypsin
- Trypsin, insulin, collagen, GLUT-4
- Trypsin, collagen, insulin, GLUT-4
General
✓✗Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide, namely
- galactose
- fructose
- ribose
- glucose
General
✓✗Adenine is a
- purine
- pyrimidine
- nucleotide
- nucleoside
General
✓✗Which of the following is an incorrect statement about proteins?
- Proteins are linear chains of amino acids.
- Adult haemoglobin has two types of subunits.
- Collagen is the most abundant protein in animals.
- The right end of the protein line is the N-terminal amino acid.