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Exam 1 Review

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sarah mcshane

on 15 September 2014

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Transcript of Exam 1 Review

Exam 1 Review
Bio 101 Fall 2014
2. Which of the following would be the most likely existing fat that the new supplement is being compared to (most similar)?
1) cholesterol 2) butter fat
3) olive oil


3. Which of the following statements is supported by the information above?
1) Patients with a high risk of cardiovascular disease have a high rate of death.
2) People with a high risk of cardiovascular disease should be advised to avoid a diet high in saturated fats.
3) There is no cardiovascular benefit to avoiding fats in one’s diet.
4) One unsaturated fat is no more protective of cardiovascular health than another unsaturated fat.

17. Scientists have a variety of mouse models of diabetes. Below is a table showing blood glucose levels in three different mice. (Normal range: between 70-150 mg/dL)
What statement is most consistent with the data?
1) Mouse 1 is a normal mouse; mouse 2 has type I diabetes; mouse 3 has type II diabetes
2) Mouse 1 has type I diabetes; mouse; mouse 2 has type II diabetes; mouse 3 is a normal mouse
3) Mouse 1 has type II diabetes; mouse 2 has type I diabetes; mouse 3 is a normal mouse
4) Mice 1 and 2 are normal mice; mouse 3 has type I diabetes
5) Mouse 1 has type II diabetes; mouse 2 is a normal mouse; mouse 3 has type I diabetes

24. In the U-tube experiment shown here, the membrane is permeable to water but not to the solute (white circles). Which statement is TRUE?
1) The right side is hypertonic to the left because the water is more concentrated on the right side.
2) The water level will be higher on the left side in a few hours.
3) Both statements are true.
4) Neither statement is true.

The solution is _____ to the cell. It has a ______ concentration of solute. Meaning it also has a _______ concentration of water.
Water moves from a ______ solution towards a _______solution.
7. Lysozyme is an enzyme that breaks down bacterial cell walls and is found in your tears, mucus, and saliva. A mutation occurs in the gene for lysozyme that results in a lysine (a positively charged amino acid) being substituted for an arginine (also a positively charged amino acid). Do you think the mutant lysozyme will function similarly to the normal lysozyme?
1) No, because all changes in protein primary sequence result in functional differences
2) No, because changing lysine to arginine will cause the protein to denature
3) Yes, because both lysine and arginine are positively charged so the tertiary structure and therefore function should be similar
4) Yes, because protein function stays the same no matter what mutations occur
1) No, because all changes in protein primary sequence result in functional differences

What determines function?

Are two amino acids
(out of hundreds!) of similar
properties likely to result in
structural differences?
2) No, because changing lysine to arginine will cause the protein to denature
Same as before, there are MANY bonds holding the proteins tertiary structure together so even if this small change did inhibit that bond, all the others would still hold.
4) Yes, because protein function stays the same no matter what mutations occur
If we had changed the amino acid from a positively charged R group to a negatively charged R group, there would have been repulsion instead of attraction. A proteins structure depends on the properties and location of its amino acids.
3) Yes, because both lysine and arginine are positively charged so the tertiary structure and therefore function should be similar

CORRECT!
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