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HIV is a virus that contains RNA. To insert its geneticmaterial into the cell's genome, HIV must:
a. Use the cell's ribosomes and enzymes to read the RNAbackward to produce DNAb. Do nothing; the virus RNA will insert itself into thecell's DNA without changingc. Use an enzyme called reverse transcriptase to convert thevirus RNA into DNA, which is then integrated into the cell's chromosomed. None of the aboce answers is correct
Which population of vesicles has a surface similar to that of the cell? Why?
Using the lytic bacteriophage P22 you perform a three-factor cross in Salmonella typhimurium. The phage is initially grown on an Arg+ Leu+ His+ strain of S. typhimurium.
Hemoglobin has subunit organization (alpha)2(beta)2 . What statement is NOT correct about hemoglobin?
Both RT and PR represent potential targets for antiretroviral drugs. Drugs called nucleoside analogs (NA) act against RT, whereas drugs known as protease inhibitors (PI) act against PR.
Explain the selective advantage of radial symmetry for sessile and free-floating animals. Explain the selective advantage of bilateral symmetry for animals that actively move in a particular direction.
The given reaction is part of the electron transport chain. Complete the reaction and identify which species is decreased.
q1. somatic cells of chimpanzees have 48 chromosomes.how many chromatids and chromosomes are present at a anaphase of
Considering the principles of mutation, genetic drift, and natural selection discussed in this and previous chapters, do you expect adaptive evolution to occur more rapidly in small or in large populations?
The target of the project is for you to evaluate the effect of an acid on enzymatic activity. As part of this project, you must identify your source of enzyme and the acid used.
Microbes were first formally observed in themid-1600’s, but the cell theory was not enunciated until1839. Write a paragraph explaining why microbiology did not becomea formally recognized science until Pasteur’s andKoch’s time.
Be able to explain how a change in photoperiod results in loss of cyclicity in seasonal breeder animals at the end of the breeding season. (i.e., how does the responsiveness and sensitivity of the hypothalamus, pituitary and ovary change and what ..
What contribution does crossingover during gamete production make in terms of the genetic makeup of the next generation of offspring?
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