Select the incorrect statement about enzymes -
(A) Enzymes require optimum pH for maximal activity.
(B) Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures of 80C-90C.
(C)Enzymes are highly specific.
(D)Most enzymes are proteins but some are lipids.

Assertion : Enzymes become denatured at high temperature . Reason : the tertiary structure of proteins gets damaged at high temperature .

Which of the following statements about enzymes are correct ? (i) Enzymes do not alter the overall change in free energy for a reaction. (ii) Enzymes are proteins whose three dimensional energy. (iii) Enzymes speed up reactions by lowering activation energy. (iv) Enzymes are highly specific for reactions. (v) The energy input needed to start a chemical reaction is called activation energy.

Read the following : (a) Low temperature preserves the enzyme (b) Enzyme gets denatured at high temperature (c ) Enzyme does not get dnatured at high temperature (d) Competitive inhibitor competes with the product formed Which of the following statement are true ?

Read the given statements and select the correct option. Statement 1 : Low temperature destroys enzymes by causing their denaturation. Statement 2 : High temperature preserves the enzymes in their inactive state.

Which of the following set is having correct statements for enzyme catalyst? 1. Each enzyme is specific for a given reaction 2. the enzyme activity is maximum at optimum pH 3. The enzymatic activity is increased in presence of certain substances called co - enzymes 4. The favourable temperature range of enzyme activity is between 50-60""^(@)C

Read the following statements about enzymes. Which among them are correct? I. The mechanism by which enzymes work is known as lock and key. II. They denature at high temperatures. III. They are mostly proteins having a tertiary structure. IV. They may be assisted by vitamins and minerals.

Enzymes work at optimum temperature. Over a range 0-40^(@)C , what would happen to the rate of enzyme controlled reactions for every 10^(@)C rise in temperature ?

Which is not true about coenzyme and prosthetic group? (a) Both are required for enzyme action (b) Both are separated from enzymes (c) Both are organic compounds (d) Both are not polypeptides

Refer to the given graph showing relationship between temperature and enzyme action. Select the correct statement regarding 'A' and 'B'. (i) 'A' shows the rate at which reaction decreases due to denaturation of enzyme molecules. (ii) 'B' shows rate at which reaction increases due to decreased kinetic energy of substrate. (iii) As temperature rises, more and more enzyme molecules are denatured and 'A' appears to fall. (iv) 'B' shows rate at which reaction increases due to increased kinetic energy of substrate and enzyme molecules.

A: Taq Polymerase is involved in PCR technique. R: This enzyme remain active during the high temperature including denaturation of double stranded DNA.