A substance that
speeds up a chemical reaction with being a reactant is called….
a) catalyst
b) enzyme
c) activator
d) all of theseABB
Explanation: in biological cell, it is called enzyme
Which of the following are biological catalysts which increase the rate of chemical reaction in living cells?
a) hormones
b) enzymes
c) steroids
d) vitamins
The sum of all the chemical reactions that a cell or larger living thing carrying out is its……..
a) catabolism
b) anabolism
c) metabolism
d) biological reactions
Explanation: metabolism is either constructive (anabolism) or destructive (catabolism)
Which of the following is incorrect about enzyme?
a) protein in nature
b) increase the activation energy
c) specific in action
d) decrease the activation energy
Explanation: Activation energy is the amount of energy required to reach the transition state.
Enzyme Structure:
Enzymes are……and their function is determined by their complex structure.
a) proteins
b) carbohydrate
c) dinucleotides
d) lipids
Explanation: Enzymes are proteins comprised of amino acids linked together in one or more polypeptide chains.
