Answer: HIV & related viruses such as HTLV possess unusual virally encoded reverse transcriptase enzyme.
Reverse transcriptase is an enzyme which synthesizes a complementary DNA or cDNA from a RNA template strand. The process of reverse transcription is used by the retroviruses for replicating their genome and proliferating within the host genome. The HIV uses reverse transcriptase to infect humans. Without the reverse transcriptase enzyme the genome of the virus cannot incorporate into the host cell and will fail to replicate. HTLV or human T-lymphotropic virus or HTLV also uses the same mechanism with the enzyme reverse transcriptase.
Answer:
Faults are the result of the stress caused by tectonic plates. The movement of said plates creates breakage and these breaks are identified as fault lines. When the tectonic plates move and collide along these fault lines earthquakes are caused.
Something that may cause this is <span>sub acute bacterial endocarditis.</span>
In the context of the neural impulse, the membrane that encases the axon is called semipermeable because FLUIDS CAN SOMETIMES FLOW INTO OR OUT OF IT.
Semi permeability is the ability of the membrane to allow certain substances, not all, to pass through it.
