The role of enzymes in biological systems is to catalyze chemical reactions. in 1894, chemist emil fischer proposed the lock and key analogy of enzyme action. this analogy explains the specific action of an enzyme with a single substrate. compare the two models seen here. how do they both represent the lock and key analogy?

The answer is A) Only a specific substrate fits into the active site of the enzyme.

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.'