Which of the following is a property of enzymes?
Enzymes function by lowering the activation energy of biochemical reactions.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Enzyme Action and Factors Affecting Enzyme Activity
Discover how enzymes catalyze reactions and the key factors—such as substrate concentration, temperature, and pH—that regulate their activity in living organisms.
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Which of the following statements about enzymes is correct?
Enzymes remain unchanged after catalyzing a reaction. They lower activation energy and function within specific temperature and pH ranges.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following is a characteristic of enzymes?
Enzymes function by lowering the activation energy required for biochemical reactions.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which property of enzymes allows them to function as biological catalysts?
Enzymes function by lowering the activation energy required for a chemical reaction to occur, thus speeding up the reaction.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following statements about enzymes is incorrect?
Enzyme activity is affected by temperature and pH, and extreme conditions can denature them.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
What is the role of competitive inhibitors in enzyme activity?
Competitive inhibitors compete with the substrate for the enzyme’s active site, reducing enzyme activity.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which type of enzyme inhibition occurs when an inhibitor binds to the enzyme at a site other than the active site?
In non-competitive inhibition, the inhibitor binds to a site other than the active site, altering the enzyme's function.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following is NOT a component of a nucleotide?
A nucleotide consists of a phosphate group, a nitrogenous base, and a pentose sugar, but not an amino acid.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following statements about enzymes is incorrect?
Enzymes are not consumed in reactions; they remain unchanged and can be reused.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following statements about enzymes is incorrect?
Enzymes are not consumed in reactions; they remain unchanged and can be reused.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following is an example of a secondary metabolite?
Morphine is a secondary metabolite, commonly found in plants, and has medicinal properties.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which of the following statements about phospholipids is incorrect?
Phospholipids are structural components of membranes but do not store genetic information.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity