Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Which site of an enzyme is called allosteric site?

What type of forces are involved in binding of substrate to the active site of enzyme?

Why are certain drugs called enzyme inhibitors?

Explain the role of allosteric site in enzyme inhibition?

What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?

Assertion: Enzymes have active sites that hold substrate molecule for a chemical reaction.

Reason: Drugs compete with natural substrate by attaching covalently to the active site of enzyme.

Assertion: Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.

Reason: In competitive inhibition, inhibitor binds to the allosteric site of the enzyme.

Assertion: Non-competitive inhibitor inhibits the catalyic activity of enzyme by binding with its active site.

Reason: Non-competitive inhibitor changes the shape of the active site in such a way that substrate can’t recognise it.

How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.

What are enzyme inhibitors? Classify them on the basis of their mode of attachments on the active site of enzymes. With the help of diagrams explain how do inhibitors inhibit the enzymatic activity.

Arrange the following in the increasing order of their property indicated:

Acetaldehyde, Acetone, Methyl tert butyl ketone (reactivity towards NH₂OH).

Write the formula and hybridization of the following compound:

tris(ethane-1, 2–diamine) cobalt(III) sulphate

Write the IUPAC name for the following organic compound:

What is synthetic polymer? Give two examples of synthetic polymers.

Classify the following compound as a primary, secondary and tertiary halide.

1-Bromobut-2-ene

Classify the following compound as a primary, secondary and tertiary halide.

4-Bromopent-2-ene

Account for the following:

Glucose is a reducing sugar

Write the reaction and IUPAC name of the product formed when 2-Methylpropanal (isobutyraldehyde) is treated with ethyl magnesium bromide followed by hydrolysis.

Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes and vinylic halides?

Write the IUPAC name of the following complex:

K₂[PdCl₄]