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In interrupted mating experiments using an Hfr strain in E. coli, you find that two genes, bio and arg, are transferred at about the same time. A third gene, pab is transferred slightly later. In order to determine the gene order, you mate an Hfr strain that is pab+ bio+ arg+ with an F- strain that is pab- bio- arg-, select 3000 recombinant pab+ clones from the recipient strain, and test them for the presence of arg+ and bio+. You obtain the following results:pab+ bio+ arg+: 2607 clones pab+ bio- arg+: 61 clonespab+ bio+ arg-: 2 clones pab+ bio- arg-: 330 clonesWhat is the order of the three genes?a bio-- arg - pabb) arb-- bio -- pabc) arg -- pab -- bio
Explain the mechanism of horizontal gene transfer during transduction. Describe a disease in which transduction plays a role and explain what it does
LDL particles have a higher percent content of cholesterol and cholesterol esters than VLDL particles. Describe the catabolism of the VLDL particles that occurs in the circulation and how this accounts for the increased content of cholesterol in t..
What sorts of plants will you select for crossing. Describe how allergies, common cold or influenza change the structures of the respiratory system and cause decrease in gas exchange.
Suppose after washing your hands, you leave ten bacterial cells on the new bar of soap. You next decide to do a plate count of the soap after it is left in the soap dish for 24 hours. You dilute 1g of the soap 1:10 and plate it on a standard plate co..
Describe why organisms only reproduce their own kind, and why offspring more closely resemble their parents than unrelated individuals of the similar species.
Swelling of the abdomen and legs due to edema is characteristic of starving children with kwashiorkor, protein-deficiency disorder. What is the relationship between this symptom and procedure of capillary exchange.
Animals obtain energy during a sequence of chemical reaction in which sugar (C6H12O6) and oxygen gas (O2) are reactants. This process produces water (H2O) and carbon dioxide (CO2) as waste products. How might you use radioactive isotope to find out w..
Use Figure 1 and 9C in the paper by Carr & Konishi, calculate the conduction velocities for the ipsilateral and contralateral axons from the nucleus magnocellularis within nucleus laminaris.
Assume there is a picture of a neuron coming from the spinal cord and synapsing with a muscle fiber. Start in the neuron. Explain the stimulation of the soma.
Think about a virus with a plus strand RNA genome 8 kb in length, which encodes eight proteins. Determine which of the following is a known mechanism for producing all eight proteins from this genome?
After much persuasion, Vanessa has finally consented to go away for a romantic weekend at a seaside resort where Eric has promised to "teach her about sex." Vanessa is both increasingly anxious about the coming weekend and enjoying fantasies of being..
mechanism for ensuring adequate amount of neurotransmitter.
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