Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are essential for processes such as digestion, metabolism, and cellular function.
MCQs OF Biology 1st year Chapter 3
Prosthetic group is: Covalenty bonded non-protein part of an enzyme
The rate of reaction of enzyme directly depends upon: Amount of enzyme present at a specific time at unlimited substrate concentration
If we add more substrate to already occurring enzymatic reaction and it has no effect on the rate of reaction, then what will be be the situation of the following: Saturation
Which one of the following statements about enzymes is not true: They are non-specific in their action
The specificity of an enzyme is due to its: Active site
The rate of an enzyme catalyzed reaction: Decreases as substrate concentration increases
The reversible inhibitors usually constitute: Weak linkage with enzyme
An activated enzyme made of polypeptide chain and a co-factor is: Holoenzyme
Enzyme that are integral part of ribosomes are involved in the synthsis of: Proteins
Koshland in 1959 proposed the modified form of: Induce fit model
Co-enzyme is a: Loosely bonded non-protein part of an enzyme
If more substrate to an already occurring enzymatic reaction is added more enzyme activity is seen because: There is probably more enzyme available than there is substrate
The catalytic activity of an enzyme is restricted to its small protein called: Active site
The active site of an enzyme: Determines by its structure the specificity of an enzyme
The raw material for co-enzymes are: Lipids `
An enzyme is said to be denatured when: Its structure is destroyed
Important : Review all previous years’ 11 Class Past Papers for comprehensive practice and better exam preparation.