Arrange the following in the proper sequence in which they occur during a single pcr cycle.
1. addition of dna nucleotides by taq dna polymerase.
2. complementary base pairing between primers and target dna.
3. heat separation of strands of target dna.

The correct order is 3 - 2 - 1

Explanation:

In order for DNA replication to occur, both strands need to be separated so the polymerase can start adding nucleotides. In a PCR, this is achieved by an increase in temperature. After both strands are separated, a DNA primer binds the sequence from which the replication will start. This is because DNA polymerases need a short complementary sequence to attach to before they start replicating. Once both strands are separated and primers are paired to DNA, Taq Polymerase can start adding nucleotides to complete the cycle.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion