According to the model, what is the role of rna in dna replication? a) rna has no role in dna replication b) rna acts as a primer to direct the synthesis of new dna by polymerase. c) rna acts as an enzyme that breaks hydrogen bonds between base paired nucleotides. d) rna stabilizes the dna molecule on the leading strand while replication occurs on the lagging strand.

Option-B

Explanation:

DNA replication is a process which replicates the DNA in a cell and increases the amount of DNA mediated by the enzymes.

The DNA replication begins when the Helicase enzyme opens the DNA and primase form an RNA molecule with a complementary sequence at 5' end of DNA which acts as a primer. The DNA polymerase can add the nucleotide after it binds the RNA primer as primer provides it's 3'-OH group to bind new nucleotides.

Since RNA molecule acts as a primer in the replication process to which the new nucleotides will be added, therefore, the Option-B is the correct answer.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.