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1. The pka values of a compound with two ionizable groups are pk1=4.10 and pk2 between 7 and 10. We have 10 mL of a 1.0 M solution of this compound at a pH of 8.0. She adds 10.0 mL of 1.0 M HCL, which changes the pH to 3.20. What is pk2?
2. Histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2. A biochemist makes up 100 mL of a 0.100 M solution of histidine at a pH of 5.40. She then adds 40 mL of 0.10 M HCl. What is the pH of the resulting solution?
Why is it important that the APs for contractile cells include that special extra step of opening the L-type Ca2+ channels? What is this period of time called?
Explain how detergent act as a cleanning agent on a molecular level.(consider structure of molecule) How does a Lithium atom and Chlorine aton react with each other? What is the most likely number and direction of e- exhange?
What is a synapomorphy?Why are phylogenetic trees built using synapomorphies? What are the problems with using all derived characters?With any shared character?
Data from a dihybrid cross involving two linked genes. From these data, determine the recombination frequency between these two genes. P0s are homozygous.
Transposons all have the capacity to move from a donor DNA to a target DNA, with the target DNA being chosen essentially at random and independent of DNA sequence.
Identify the ways in which telomeres and centromeres are similar. Choose all that apply. serve the same functions. are packaged into heterochromatin.
The gene for sickle-cell anemia exhibits heterozygote advantage. An individual who is an HB-A/HB-s heterozygote has increased resistance to malaria and therefore has greater fitness than the HB-A/HB-A homozygote, who is susceptivle to malaria, and..
why did you add cold ethanoL? when you use a protease enzyme in your human DNA isoIation.
As part of characterizing a newly discovered human gene, you are fortunate to hve available a full-length cDNA in a plasmidvector. If you were to sequence this cDNA, which parts of the genewould you expect to see represented in the cDNA sequence?
1. how is potassium-argon dating useful to a palaeoanthropologist when it cant be used to date bone?2. what techniques
Compare the reactants, products, and energy yeilds of aerobic metabolism versus fermentation in human cells.
If a plant that is 4n undergoes sympatric speciation by autopolyploidy, what will be its ploidy as a new species?
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