An infection in the body might result in a sudden
(1) decrease in the activity of antigens produced
by the mitochondria
(2) decrease in the amount of dna present in
the nuclei of cells
(3) increase in the activity of white blood cells
(4) increase in the number of red blood cells

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.'