Name:
Score: /100
Spring
2019
Instructor:
Exam 2 Biology
103: General Biology Laboratory
This is a cumulative examination of the
following topics discussed from Week 1-Week 9: Evolutionary History &
Classification, Phototaxis in Euglena, Osmosis, Sensory Perception, Microbial
Diversity, Mendelian Genetics, Molecular Genetics, and Nutrition. You will
be assessed on your own detailed findings in the laboratory, as well as
conceptual information regarding the various labs. You will only have 45
minutes to complete the exam. You MUST answer all questions in complete
sentences—bullet points are not allowed. I expect the answers to be in
paragraph format with detailed responses—I will look for specific key words
discussed in lecture. Answer the question to the best of your ability. Note
that multiple choice questions can have more than one answer. Good luck.
1.
Given an RNA sequence, identify the amino acids that
make up this structure. Use the DNA codon table provided in the back of the
exam. Be sure to write the full name of each amino acid. 3 letter abbreviations
not permitted! (10 points)
GAG-CCC-UCA-AUC-AGG-CAU
2.
This box shows gas particles in a medium of air. (5
points)
a.
Identify the movement of particles in this box (NOTE:
I do not want a direction, but rather a direction in terms of concentration)
b.
Describe what the box will look like over time. What
are the particles trying to achieve? (You may draw and provide an explanation
or given an explanation of what it will look like)
c.
What is this an example of?
3.
A student is trying to show his peers an example of
what would happen to a cell in the presence of a relatively low concentrated
solution. He identifies that the solution, is in fact an isotonic solution.
His rationale is due to the eventual equilibrium of particle movement in
the example. Below, is an image of what he believes the answer should be.
Correct his assumptions and recreate a new drawing of what he was supposed to
draw. What will the cell look like over tine? (20 points)
4.
Your professor asks you to survey the land at CSUDH
for microbial diversity. She asks you to replicate this experiment at least
into 3 trials. Your hypothesis states that you conclude that microbial
diversity will present no change or decreasing diversity over time. Does this
hypothetical statement make sense after performing your surveyance at CSUDH? If
not, why? If it does make sense, no explanation is required. (5 points)
5.
Provided a phylogenetic tree, deconstruct the tree by
creating a classification chart of the species—represented by numbers and
traits. Use “+” to indicate that the species possess the trait and “o,” if the
species lack the trait. Identify at least 4 species that underwent convergence.
(10 points)
6.
Given the following reagent tests, identify the macromolecules
it identifies. For each one, indicate what would yield a positive
result. (10 points)
a.
Biuret’s reagent
b.
Iodine reagent
c.
Benedict’s reagent
d.
Brown paper reagent (Sudan III)
7.
The following pedigree shows the inheritance of webbed
feet. Those who are shaded possess the trait for webbed feet. Indicate the
genotype for all the individuals in this chart. What is the mode of inheritance
in this pedigree example? Is this a dominant or recessive trait? (20 points)
F= normal feet, f= webbed feet
8.
The following pedigree shows the inheritance of
teleportation. Those who are shaded possess the trait for teleportation.
Indicate the genotype for all the individuals in this chart. Is this a dominant
or recessive trait? (20 points)
T= teleportation t= no teleportation
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