“Synonymous and nonsynonymous” sites essay question
Explain why synonymous sites typically evolve faster than nonsynonymous sites.
In: Biology
5. Describe the different ways that C4 and CAM plants carry out photosynthesis, when compared to C3 plants; and then explain in each case why these differences evolved.
In: Biology
In: Biology
3. Discuss fermentation: Name the two types of fermentation. Give the end products of each type. Summarize the net energy gain of each type. Give examples of cells which carry out each type.
In: Biology
“Florida mice” essay question
Describe Hopi Hoekstra’s evidence for how coloration for Atlantic coast beach mice of Florida evolved independently from coloration for Gulf coast beach mice of Florida. Be specific in terms of the different genetic mechanisms associated with the formation of a similar phenotypic trait across the two beach mice populations. How did Hopi Hoekstra test the fitness (differential survival) associated with the presence or absence of the coloration trait in the beach mice? How do we know that the pale coloration trait of beach mice was derived from the ancestral coloration of mainland mice, and not vice versa? How could you test to see whether the change in coloration trait was heritable and not just a consequence of phenotypic plasticity?
In: Biology
“Introns and Exons” essay question
Explain why the average rate of evolution differs between introns and exons, and why this is important for choosing genetic markers to be used in phylogeny construction.
In: Biology
Why is using aseptic techinque important?
Why is a plate containing 30-300 CFU's more useful for calculating the concentration of the original culture tube than a plate with only two colonies?
In: Biology
Lab 5: Practice Dilution Problems
You have a stock solution that contains 24 mg/ml of protein. You want to make a set of standards with the following concentrations:
8 mg/ml
4 mg/ml
2 mg/ml
You need a minimum of 300 ul of each standard.
Using the technique of serial dilution, explain how you would make your standards by filling in the chart below.
|
Standard 1 |
Standard 2 |
Standard 3 |
|
|
concentration |
8 mg/ml |
4 mg/ml |
2 mg/ml |
|
dilution factor/ from |
|||
|
ml of concentrate |
|||
|
ml of diluent |
|||
|
final dilution of stock |
|||
|
final volume/tube |
You have a stock solution that contains 200 mg/ml of protein. You want to make a set of standards with the following concentrations :
100 mg/ml 12.50 mg/ml
50 mg/ml 6.25 mg/ml
25 mg/ml 3.125 mg/ml
You need a minimum of 300 ul of each standard.
Using the technique of serial dilution, explain how you would make your standards by filling in the chart below.
|
Std 1 |
Std 2 |
Std 3 |
Std 4 |
Std 5 |
Std 6 |
|
|
concentration |
||||||
|
dilution factor / from |
||||||
|
ml of concentrate |
||||||
|
ml of diluent |
||||||
|
final dilution of stock |
||||||
|
final volume/tube |
Dilute the following making sure you end up with a minimum volume of at least 10 ml.
|
stock conc |
desired conc |
dilution factor |
volume stock |
volume diluent |
|
25 mg/ml |
5 mg/ml |
|||
|
30 mg/ml |
2 mg/ml |
|||
|
50 mg/ml |
0.5 mg/ml |
|||
|
100 mg/ml |
25 mg/ml |
|||
|
5 mg/ml |
0.1 mg/ml |
|||
|
3 mg/ml |
1.5 mg/ml |
|||
|
20% (v/v) |
0.5% (v/v) |
|||
|
10x |
1x |
|||
|
5x |
1x |
|||
|
25% (w/v) |
5% (w/v) |
|||
|
106 cells/ml |
104 cells/ml |
|||
|
200 ppm |
1 ppm |
|||
|
30% (w/v) |
20% (w/v) |
|||
|
100% (v/v) |
75% (v/v) |
In: Biology
Considering the Metabolic pathways of Pseudomonas aeruginosa:
A. Briefly evaluate the metabolism of the organism. How do they make PMF, ATP and reducing power? Do they have a broad or a narrow metabolic capacity?
B. How would deleting the TCA cycle affect this organism?
C. What about a mutation in the quinol binding site of the bc1 complex (Complex III) so that it could not accept a quinol?
D. What about a mutation in the gene that encodes glyceraldehyde-3-P dehydrogenase (the enzyme that catalyzes the oxidation of G-3-P)?
In: Biology
Purple Team :
Discuss preoperative and postoperative care of the
rhinoplasty patient and possible postoperative complications
of a patient undergoing a rhinoplasty.
Gold Team :
Discuss the signs and symptoms that a patient will
exhibit with tuberculosis and the type of precautions
that must be followed when caring for a patient with
tuberculosis
In: Biology
1. Draw the peptide DCTEVKKR at a ph 7.4 in the trans configuration.
2. Consider the peptide from #1 for the questions below.
Calculate the pI of the above peptide. (I recommend showing your work – you can attach it on a separate sheet of paper or insert pictures).
3. Based on it’s sequence of amino acids and the answer to (2) above, suggest a possible function for the peptide.
4.What interactions would contribute most to tertiary structure? Explain your choice.
5.If a neutral mutation occurred, what do you think the peptide might be changed to? Explain your choice. (Multiple correct answers are possible).
In: Biology
In: Biology
what is the evidence supporting animal evolution from a protist ancestor? be sure to identify the protist ancestor and supergroup of both the protist ancestor and animal group? 2. if hydra live as a colony what cepecialization do different individules preform? plz i need answer
In: Biology
Custom made primers are shipped as DNA powders. A student received a tube containing 19.5 nmoles of primer. To make 75 µM primer solution, she needs to add ___ µl water to the tube.
In: Biology
What roles can glial cells play?
Immunity and mechanical support
Mechanical support and ionic - balance of the extracellular space
Ionic balance of the extracellular space and myelination
and a b only
a, b and c
In: Biology