- First Exam - 2013
Place the letter of the choice that best answers the question on the line to the left.
Two Points Each. NOTE: “e” answers are never the correct answer.
_______ 1. Which of these is a domain?
a. Gene b. Allele c. Hydration shell
d. Active site e. Yankee Stadium
_______ 2. Digestive breakdown of organic polymers should involve
a. Temperature changes b. Hydrolysis
c. Dehydration synthesis d. Phosphorylation
e. Bloated tummies and nasty burps
_______ 3. Electrons are often transported by
a. Carriers b. Oxygen c. Hydrogen
d. Lipids e. Little bitty briefcases
_______ 4. An antigen is
a. Produced by the immune system b. A foreign molecule
c. A toxin aimed at enzymes d. A form of RNA
e. A cross between an ant, a tiger, and…I give up
_______ 5. Group transfer potential is often at play in the actions of
a. Receptors b. Carbohydrates c. Coenzymes
d. ATP e. Vacation packages
_______ 6. At optimum temperature
a. Participating particles are all moving their fastest
b. The greatest number of enzyme molecules are active
c. All charges are balanced
d. All of the above
e. Everything’s cozy
_______ 7. Hormones are what type of molecules?
a. Always proteins b. Proteins or carbohydrates
c. Proteins or lipids d. Always carbohydrates
e. The type that can get
you in a lot of trouble
_______ 8. If DNA polymerase is broken down, it will yield
a. DNA b. Amino acids c. Sugars
d. Nucleotides e. A terribly depressing status update
_______ 9. A Q10 expresses a relationship between
a. Enzymes and pH b. Reactions and temperature
c. Enzymes and temperature d. Reactions and pH
e. A letter (Q) and a number (10)
_______ 10. Proteins denature because
a. Nitrogens are lost b. Carbons are lost
c. Covalent bonds break d. Hydrogen bonds break
e. They have gotten really depressed
_______ 11. Some plants do C4 photosynthesis in order to
a. Conserve water b. Increase glucose output
c. Reduce ATP needs d. Reduce mineral needs
e. Lord it over all the other plants
_______ 12. Enzymes are generally NOT good at
a. Attaching to substrates b. Moving electrons
c. Releasing products d. Lowering activation energy
_______ 13. An antenna complex is a collection of
a. Enzymes and substrates b. Unstable isotopes
c. Polar groups d. Chlorophyll molecules
e. Houses that don’t get cable
_______ 14. Which bonds represent attractions between charges, full or partial?
a. Ionic & hydrogen b. Covalent & hydrogen
c. Ionic & covalent d. All of these do
e. Sticky buns…err, bonds
_______ 15. A newly-made protein is helped into the proper conformation by
a. Codons b. Phospholipids
c. Chaperonins d. Ligands
e. Walmart greeters
_______ 16. If an effect is allosteric, there is
a. No actual effect – chemistry is unaltered
b. A change in a gene code
c. A shape change
d. A loss from one end of the string
e. A molecular Allosaurus biting things
_______ 17. The rate of production of a pathway can be limited by
a. The slowest enzyme
b. The amount of one starting substrate
c. The amount of a single enzyme
d. All of these
e. Whether the shop is unionized
_______ 18. Overall, producers, compared to consumers,
a. Have more species and more biomass
b. Have fewer species and more biomass
c. Have more species and less biomass
d. Have fewer species and less biomass
e. Are the ones running the system (is that funny?)
Pick NINE questions to answer in the spaces provided.
NOTE: if you answer MORE than nine, only the first nine will be corrected.
Four Points each. Partial credit is possible.
Select and answer completely any four of the following questions.
Note: if you answer more than four, only the first four will be corrected.
Seven Points Each. Partial credit is possible.
Answer as many or as few as you wish. You can't lose points on the rest of the exam by getting these wrong. Partial credit is possible.
What atom is NOT part of “HONC,”
yet commonly forms 2-bond “bridges” within protein molecules?
What is odd and almost unexplainable
about the amino acids used by living things? Three Points.
What movie monsters are
prions compared to, and why? Three Points.
What are the two different
responses that ants have to ant alarmones? Three
What type of molecule used to be
thought to have just a couple of cellular functions, but is now found to
have a huge variety?
What real-life situations should follow a Michaelis-Menten pattern? Two Points Each, up to Three.
What is a “typical” turnover number (Two Points), and why are such numbers largely artificial? (Three Points)
Why might a species have two enzymes doing the same reaction? Three Points.
What simple feature of vitamins is generally not known? Three Points.