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Suppose that you discover a new life form on Mars. These organisms have DNA containing the same four nucleotides as Earth DNA. They also make proteins using a triplet code, so they use the same 64 codons that Earth organisms do. Martian proteins are also similar to Earth proteins, but it turns out that Martian proteins use 24 different amino acids instead of just 20.
How might you expect the Martian code to differ from the Earth code? To put it another way, if Earth life forms actually originated on Mars, what changes in the Martian code could have resulted in the Earth code? To put it still another way, what changes in the Earth code would be necessary to accommodate 4 additional amino acids?
Justify the changes you select. What other genetic changes would be necessary to support the assignment of new codons?
Early in development, most human cells turn off expression of an essential component of telomerase, the enzyme responsible for addition of telomere repeat sequences to the ends of chromosomes.
The Assignment is Due on tonight at 11:59 pm so the sooner the better. I know its long Design an experiment in which you will test the effect of an acidic fluid on enzymatic activity.
Compute the number of lipid molecules we added to each cell to make the tethered membrane.
Assume that flower color is inherited by simple dominance and that red flowers are dominant to white flowers.
Assume A broth contains bacterial cells at a concentration on 10^5 cells per milliliter. You dilute this broth through removing 1ml and adding it to 9ml.
If narrow-sense heritability in the rabbit population is 0.7, what is an expected body weight among offspring of selected rabbits. What was the amount of cash paid on accounts payable for the period of the year ended December 31.
A corporation has invented a new low-calorie sugar substitute. They wish to determine if the substitute might be carcinogenic, so they use it in the Ames test with Salmonella his mutants.
If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many dissimilar phenotypes are their offspring expected to show.
What is the hydraulic conductance of the arterial side. How could the venous conductance be smaller or bigger than the arterial conductance.
Suppose an ecologist is studying interactions among different species in an ecosystem. What level of organization should the ecologist study?
The external environment is open directly to the peritoneal cavity of the abdomen and pelvis. This is one source of pelvic inflammatory disease.
Forecast what would happen if the cytoplasm increased as the embryo cleaved. Explain why would this be a problem?
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