BIO SCI 93 Study Guide - Midterm Guide: Margarine, Surface Tension, AtherosclerosisExam

Biological Sciences
Course Code
Jorge Busciglio Kim Green Marcelo A Wood
Study Guide

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Name___________________________________ Student ID Number_____________________
Seat Number________________
1. I am taking version:
a. A
b. B
2. A diet high in animal products and hydrogenated vegetable margarine may
increase the risk for atherosclerosis. This is because
a. most animal fats are unsaturated and most hydrogenated vegetable
margarines contain high levels of steroids.
b. most hydrogenated vegetable margarines are hydrogenated oils and most
animal products contain high levels of phospholipids.
c. most animal fats are used for energy storage and most hydrogenated
vegetable margarines contain high levels of unsaturated fats.
d. most animal fats are saturated and many hydrogenated vegetable
margarines contain high levels of trans fats.
3. Patient X is always tired and lacks energy, suffering from a metabolic disease.
Which of the following organelles is most likely involved in this disease?
a. lysosomes
b. Golgi apparatus
c. ribosomes
d. mitochondria
4. In the equation 2 H2 + O2 → 2 H2O,
a. H2, O2, and H2O are all compounds.
b. H2, O2, and H2O are all elements.
c. only H2O is a compound.
d. only H2 and O2 are compounds.
5. The temperature of evaporation is much higher for water than for alcohol.
Without knowing more about the chemistry of alcohol, which of the following is
the most logical chemical explanation for this phenomenon?
a. Ionic bonds form between alcohol molecules. These are the weakest type
of bond and are easier to break than the hydrogen bonds between water
b. Alcohol has a higher surface tension than water. This means that alcohol
molecules can easily break away from other alcohol molecules and
evaporate at a lower temperature.
c. Alcohol molecules are more cohesive than water molecules. This means
that as alcohol molecules evaporate, they pull other alcohol molecules into
the air along with them.
d. Fewer hydrogen bonds form between alcohol molecules. As a result, less
heat is needed for alcohol molecules to break away from solution and
enter the air.

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Name___________________________________ Student ID Number_____________________
Seat Number________________
6. What would happen to a plant cell if placed in a hypertonic solution?
a. Plasmolyzed
b. Turgid
c. Flaccid
d. Nothing would happen
7. A child is brought to the hospital with a fever of 107°F. Doctors immediately order
an ice bath to lower the child's temperature. Which of the following statements
offers the most logical explanation for this action?
a. Elevated body temperature will increase reaction rates in the child's cells
and overload the limited number of enzymes found in the cell.
b. Elevated body temperatures may denature enzymes. This would interfere
with the cell's abilities to catalyze various reactions.
c. Elevated body temperatures will increase chemical reactions in the body.
This will interfere with the ability of enzymes to catalyze vital chemical
d. Elevated body temperatures cause molecules to vibrate more quickly and
prevent enzymes from easily attaching to reactants. This would slow vital
body reactions.
8. An immune system cell called the plasma cell produces thousands of antibodies
per second for release into the body. What type of intracellular structure would
you expect to be very prominent within the cell?
a. nucleus
b. endoplasmic reticulum
c. peroxisome
d. microtubules
9. Which of the following would be inhibited by a drug that specifically blocks the
addition of phosphate groups to proteins?
a. G protein-coupled receptor binding
b. ligand-gated ion channel signaling
c. estrogen binding to its receptor
d. receptor tyrosine kinase activity
10. Cytochalasin D is a drug that prevents actin polymerization. A cell treated with
cytochalasin D will still be able to _____.
a. transport cellular components over short distances
b. contract muscle fibers
c. extend pseudopodia
d. move vesicles within a cell
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