While most DNA replicates with fairly high accuracy, mistakes do happen, with polymerase enzymes sometimes inserting the wrong nucleotide or too many or too few nucleotides into a sequence. Which of the following results from an incorrect base pairing during DNA replication?

a. mutated DNA strand
b. mutated RNA strand
c. complementary RNA strand d. complementary DNA strand

a). mutated DNA strand

Explanation: Mutation is a permanent alteration or change in the nucleotide sequence of a DNA. When one or more wrong nucleotides are added to a growing strand of DNA during replication, the base pairs involved are said to be mismatched. These mismatches result in a mutated DNA strand instead of a complementary DNA strand. Normally, new DNA strands are complementary to the template strand in the sense that they are not the same in base composition and sequence rather, wherever adenine is found in the template strand, thymine occurs in the new strand and wherever guanine occurs in the template strand, cytosine occurs in the new strand.

it would lead to upper respiratory infections and pneumonia.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex