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The amino acid threonine has a hydroxyl side chain for which the pKa is 8.18. Calculate what fraction of the threonine side chains will carry a negative charge at pH 7.
Assume you are studying a circular plasmid DNA molecule of size 10,500 base pairs. When you digest this plasmid with 3 different restriction enzymes,
What is the probability that their next child will be a taster.
The 4X objective has a field of view of 3mm. If you viewed a specimen through the 10X objective and the specimen spanned approximately 50% of the field of view!
Preliminary trials suggest that the drug tamoxifen, antiestrogen commonly use to treat breast cancer, is useful in treating biopolar disorder. Tamoxifen is an inhibitor of Protein Kinase C.
Explain why a woody plant tends to produce more branches when it is pruned. How are both auxins and cytokinins involved in the regulation of branching?
Eukaryotic cells are more complex than prokaryotic cells. Explain their differences, functions and the composition of each including how genetic material is replicated.
What are some biotic factors involved in the nitrogen cycle? Are there any abiotic factors to be considered?
The value of DNA per cell of particular species is measured in cells found at various stages of meiosis and the cell cycle, and the amounts are obtained.
which of the following is NOT true concerning the atomic nucleus?
A rabbit taken from a meadow near sea level and moved to a meadow high on a mountainside would have some trouble breathing. Why give an appropriate reason.
Spiny species of diatoms are found both in warm subtropical waters in addition to in colder areas. Since warm water is less dense than cold water, would you predict any differences between the spines of warm-water and cold-water individuals? Why.
Assume that you measure the OD of two E.coli cultures: culture A and culture B. The spectrophotometer gives you a reading of 3.2 for culture A and 0.01 for culture B. What would you do to determine the concentration of culture A and B and why? Giv..
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