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:
<u>1- The graph provides a comparison of the different marketing strategies</u>
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<u>2- The graph helps in selecting the best marketing strategy to improve sales</u>
Explanation:
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Answer:
According to Darwin, species evolve because those with undesirable or dangerous traits don't reproduce as much or die before they can reproduce. This causes the organisms with the most desirable traits that allow for higher reproduction or survival rates (which go hand in hand) to pass those traits on until they eventually evolve into a different species.
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In 1951 Franklin joined the Biophysical Laboratory at King’s College, London, as a research fellow. There she applied X-ray diffraction methods to the study of DNA. When she began her research at King’s College, very little was known about the chemical makeup or structure of DNA. However, she soon discovered the density of DNA and, more importantly, established that the molecule existed in a helical conformation. Her work to make clearer X-ray patterns of DNA molecules laid the foundation for James Watson and Francis Crick to suggest in 1953 that the structure of DNA is a double-helix polymer, a spiral consisting of two DNA strands wound around each other.
