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1. CONCISELY AND CLEARLY describe the regulatory switch of the operon that manufactures tryptophan in E. coli.
2. CONCISELY AND CLEARLY describe the roles that RNA polymerases I, II & III play with respect to the major RNA types in eukaryotic cells?
3. Why are there 48 (humans) different tRNAs for 61 codons and only 20 aminoacyl-tRNA-synthases coupling these 48 (humans) tRNAs?
4. What are the recognition and "end replication" problems in eukaryotic and prokaryotic cells and its solutions in DNA (repair)?
5. In which type of mimicry is the model negatively affected by the mimic?
In Drosophila, the eye-color mutation scarlet (st) and the bristle mutation spineless (ss) are located in chromosome 3 at a distance of 14 map units. What phenotypes, and in what proportions, would you expect in the progeny from the mating of st+ ..
Discuss the significance of these bacterium Staphylococcus epidermidis, and Enterobacter aerogenes Do they have medical or health importance
Explain how DNA is responsible for protein structure, both in prokaryotes and eukaryotes. provide your answer.
If a 1000 kilobase fragment of DNA has five evenly spaced replication origins and DNA polymerase moves at 1 kilobase per second, how many seconds will a cell take to produce two daughter molecules?
A human RBC is approximately 8 micrometers in diameter. An unknown bacterium measures 1 ocular space using the oil immersion objective compared to 3 spaces on the stage micrometer. How big is the unknown bacterium ?
Determine the location of the fruit color gene relative to the fruit shape gene - What are the genotypes of plant A and plant B and how do I determine this answer?
a girl developed generalized seizures. a ct scan revealed a single brain lesion consistent with a tumor. biopsy of the
predict the effects of a drug that activates the sympathedic nervous system on blood pressure and heart rate. How would this drug affect the three factors that determin blood pressure?
Discuss the difference between a totipotent cell and a differentiated cell, genetically and morphologically?
What are the three stages of activity in the life of an angiosperm pollen grain which succeeds in fertilizing an ovule with its sperm?
Five Hfr stains A through E are derived from a single F+ strain of E. coli. The following chart shows the entry time of the first five markers into an F- strain
Describe why morphine, pentazocine, and naloxone have very different pharmacological and adverse effects on a patient.
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