Each enzyme has a temperature at which it works best. a slight increase in temperature can increase enzyme activity while a large increase in temperature can cause the enzyme to become denatured. which of the following best explains what happens when a protein becomes denatured?

the enzyme absorbs heat until the temperature decreases, and the reaction then continues normally.

the enzyme breaks apart into the amino acids that originally combined to form the enzyme.

the enzyme loses its shape and is no longer able to catalyze chemical reactions.

the enzyme unfolds and refolds into a different shape, and is used to catalyze a different chemical reaction.

Option (3).

Explanation:

Enzymes are the  bio catalyst that can increase the rate of a bio chemical reaction without themselves going under any change. Enzyme decreases the activation energy of the reaction and increases the rate of reaction.

Denaturation of protein results in the loss of biological activity of enzyme. The enzyme loses its shape and cannot catalyze the reactions as enzymes are shape specific.

Thus, the correct answer is option (3).

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'