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Which of the following statements is incorrect regarding enzymatic activity?
  • a)
    It increases with increase in substrate concentration upto the saturation point
  • b)
    It is highest at optimum pH value
  • c)
    It initially decreases with increase in pH value
  • d)
    It initially increases with increase in temperature and then decreases
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Which of the following statements is incorrect regarding enzymatic act...
Every enzyme posses an optimum pH value where it is most effective. Most enzymes show maximum activity in a pH rang of about 6.0 to 7.5 i.e, near neutra pH. Some digestive enzymes have their optimum pH in the acidic or alkaline range. E.g., pepsin of gastic juice has its optimum at pH 2 (acidic) whereas typsin of pancreatic juice shows maximum activity at pH 8.8 (alkaline). A rise and fall in pH reduces enzyme activity by changing the degree of ionisation of its side chain.
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Most Upvoted Answer
Which of the following statements is incorrect regarding enzymatic act...
Enzymatic activity refers to the rate at which an enzyme catalyzes a specific reaction. The correct statement regarding enzymatic activity is:

a) It increases with increase in substrate concentration up to the saturation point: The rate of reaction increases as the substrate concentration increases until the enzyme becomes saturated with substrate molecules.

b) It is highest at optimum pH value: Each enzyme has a specific pH range at which it functions optimally. Any deviation from this pH range can affect the enzyme's activity.

c) It initially decreases with an increase in pH value: This statement is incorrect. Enzymes have an optimal pH range, and any deviation from this range can affect the enzyme's activity. However, the activity does not initially decrease with an increase in pH value.

d) It initially increases with an increase in temperature and then decreases: Each enzyme has an optimal temperature range at which it functions optimally. However, at temperatures above the optimal range, the enzyme's activity decreases due to denaturation.

In summary, option C is incorrect regarding enzymatic activity. The correct statement is that enzymatic activity initially increases with an increase in temperature and then decreases.
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Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: Rate of reaction is a measure of change in concentration of reactant with respect to time.Reason: Rate of reaction is a measure of change in concentration of product with respect to time.

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Which of the following statements is incorrect regarding enzymatic activity?a)It increases with increase in substrate concentration upto the saturation pointb)It is highest at optimum pH valuec)It initially decreases with increase in pH valued)It initially increases with increase in temperature and then decreasesCorrect answer is option 'C'. Can you explain this answer?
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