In what ways can a primer for DNA synthesis by a DNA polymerase be provided?
What will be an ideal response?
Ans: DNA polymerases require a free 3?-OH end of either RNA or DNA, called a primer, in order to initiate DNA synthesis. In DNA replication, this is most often accomplished by the synthesis of a short RNA sequence from the DNA template by a primase, an RNA polymerase that does not require a free 3?-OH end. Primers can also be generated by the hybridization of an already synthesized RNA to the template strand, or by the nicking of a strand of the DNA. In some cases, a protein can directly prime the polymerization reaction.
You might also like to view...
You discover a fungus that is associated with plant roots, with hyphae that actually penetrate the root cells and
produces tree-like structures within the root cells. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Research for a universal flu vaccine tends to focus on
A. H spikes as they mutate rapidly, allowing for more chances for the vaccine to work. B. core proteins, as they do not mutate as rapidly as H and N spikes and they tend to be similar between different influenza strains. C. viral tails because they exist in all flu viruses and do not mutate often. D. N spikes because they tend to be similar between different influenza strains.
List the types of erectile tissue present in the penis, and explain how the penis becomes erect upon sexual stimulation. What will be an ideal response?
What is a sex-role reversed species?