Download Tentative Homework Schedule summer

1
Tentative Homework Schedule. Bi112 Cell Biology, Dr. Wesley Dubbs
Additional homeworks may be assigned. The actual homeworks and their due dates will be specified during lecture
(attend lecture and note in lecture slides).
Science/Pseudoscience Homework
Approximate Due Date; Week 1
For next class period, pick 3 of the statements from the board and determine which is science and which is pseudoscience Pick 3
of the statements from the board and research to determine which is science and which is pseudoscience (or not or is it
something “other”)
*What is the statement/summary of issue?
*Is the statement supported by science or not (pseudoscience)?
*What is the source of your information?
*How did you get to your source?
“Never shower in a thunderstorm” by Anahad O'Connor
---------------------------------------------------------------------------Chemistry Homework
Approximate due date; Week 2
1. Carbon, Hydrogen, Oxygen, and Nitrogen are the 3 most common atoms in living organisms. Fill in a table like that
below indicating the elements chemical symbol, # of protons, neutrons and electrons and indicate a molecule that
contains that element. Hint: the next chapter shows many molecules you can use.
Element
Chemical symbol # of protons # of neutrons # of electrons Molecule containing
Carbon
Hydrogen
Oxygen
Nitrogen
2. What are the 3 major types of atomic bonds that hold molecules together? Which bond is results from the sharing of
electrons? Which bond results from full opposite charge attractions? Which bond results from partial/weak opposite charge
attractions?
3. a. To show how multiple water molecules interact, draw at least two water molecules, each showing two H and one O, the
covalent bonds, any electrical charges the molecule has and how they hydrogen bond with each other.
b. Water has several interesting properties/characteristics. Pick two and explain how the structure you drew leads to these
properties
---------------------------------------------------------------------------Syllabus quiz (see handout in class)
Approximate due date; Week 2
Website Evaluation (see handout in class)
Approximate due date; Week 2
---------------------------------------------------------------------------Macromolecules Homework
Approximate Due Date; Week 2
Cells contain 4 major groups of organic molecules called macromolecules. These large molecules are polymers and are built up
out of smaller subunits called monomers.
Fill in a table like that below indicating the macromolecule group, its monomer, its solubility and give a specific example of a
polymer within the group.
Macromolecule Monomer- the building blocks of the
Solubility (fat soluble and/or water Polymer give a specific
macromolecule
soluble)
example
Ex. A specific polymer example is cellulose, a polysaccharide, found in plant cell walls.
P.S. !”meat” is not a protein! “Meat” is cellular and made up of 1,000’s of components. But you can tell me the name(s) of
the major protein(s) found in meat?
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Cell Figure
Approximate due date; Week 3
Draw a eukaryotic cell
Label the following (Golgi, mitochondria, nuclear envelope, nucleolus, nucleus, plasma membrane, ribosome, rough ER,
smooth ER, vesicle)
Pick 3 of the above and briefly describe its structure/function
---------------------------------------------------------------------------Diffusion & Osmosis Homework
Approximate Due Date; Week 4
Recall chemistry and macromolecule’s building blocks (polar, hydrophobic, hydrophilic)
1. Substances move “across a membrane”. What does that mean?
2. How does osmosis differ from diffusion? (hint: there are 2 differences). One
relative to the substance the other relative to membranes.
3. a. Cell membranes are “selectively permeable”. Look at this figure.
b. What things easily pass through the cell’s phospholipid bilayer into/out of cells
(via simple diffusion)? Why?
c. What things cannot pass into cells via simple diffusion? How do these things get
through the cell membrane get into/out the cell?
4. a. How does facilitated diffusion differ from active transport? (relate your
answer to concentration gradients).
b. How is facilitated diffusion similar to active transport?
c. What things get into/out of the cell via facilitated diffusion?
d. What things get into/out of the cell via active transport? Hint: same things as in
question 4.c.
---------------------------------------------------------------------------Metabolism Homework
Approximate due date; Week 4
1. What is meant by energy coupling? Which molecule is most commonly used in energy coupling?
2. Define: enzyme and catalyst
3. How do enzymes work?
4. What is the first law of thermodynamics? Give an example.
5. What is the second law of thermodynamics? Give an example.
6. For the following energy profile indicate (ABCD or E):
• Which graphed curved line indicates an enzyme catalyzed reaction?
• Which graphed curved line indicates an un-catalyzed reaction?
• What is the activation energy with enzyme?
• What is activation energy without enzyme?
• What is the total energy released by the reaction?
7. Is this an endergonic or exergonic reaction?
---------------------------------------------------------------------------Cellular Respiration Homework
Approximate due date; Week 5
Draw a plant cell and label the following: (Note: cellular respiration happens in your cells as well as within plant cells)
Nucleus, mitochondria, large central vacuole and chloroplast.
Draw a mitochondrion and label the following:
Outer membrane, inner membrane, matrix and the intermembrane space.
On your drawing/s indicate where the following occur: glycolysis, the citric acid cycle (Krebs’s cycle), and the electron
transport chain.
---------------------------------------------------------------------------Photosynthesis Homework
Approximate due date; Week 5
Draw a plant cell and label the following:
Nucleus, mitochondria, large central vacuole and chloroplast.
Draw a chloroplast and label the following:
Granum, stroma and thylakoid membrane. Where do the light dependent reactions occur (those that make ATP and the
electron carrier NADPH)? Where do the light independent reactions occur (those that use ATP and NADPH to “fix”
carbon dioxide into organic molecules)?
3
Central Dogma/DNA Homework
Transcription:
What is the complementary RNA transcribed for the following DNA strand?
ATTAGCCTA
What is the enzyme that catalyzes RNA transcription?
Approximate due date; Week 5
Translation:
What are the 3 types of RNA involved in protein translation from mRNA?
Using the genetic code in your textbook, what is the amino acid sequence the following mRNA would code for (recall the
start codon)
mRNA 5’-C G A U G G C U C A A U G A-3’
---------------------------------------------------------------------------DNA Replication Homework.
Approximate due date; Week 6
1. What are 3 ways that DNA differs structurally from RNA?
2. What are 3 ways that DNA differs functionally from RNA?
3. What is the enzyme that catalyzes DNA polymerization, its name?
4. Replication of DNA is “semiconservative”. What does that mean?
5. If you find a strand of DNA with the sequence below, what is the DNA sequence of a newly replicated complementary
strand? CCGATAGTA
---------------------------------------------------------------------------Mitosis; describe the phases, Homework
Approximate due date; Week 7
1. Where in your body is mitosis occuring? Why is mitosis necessary?
2. Describe the events in each of the following phases of the cell cycle; G1, S, G2, and Mitosis.
3. Briefly describe how prokaryote chromosomes differ from those of eukaryotes.
4. With respect to mitosis briefly describe the main events that occur during the following phases: prophase, metaphase,
anaphase, and telophase.
5. Define the following: diploid, haploid, somatic cell, germ cell & cytokinesis
6. What are homologous chromosomes? How do they interact during mitosis? How do they interact during meiosis?
---------------------------------------------------------------------------Genetics activity Homework
Approximate due date; Week 8
see handout.