BI 171 - Third Exam - 2004
Links go from numbers to pertinent passages in the book.
Place the letter of the choice that
best answers the question on the line to the left.
_______ 1. After being filtered through the kidneys, sugar must be recovered by the blood - sugar moves from the filtrate, where there is more, into the blood, where there is less, past the equilibrium point and on until all of the sugar has left the filtrate for the blood. This is done by
a. Passive transport, then active transport
_______ 2. Animal cells lack cell walls because they need
a. More protection
b. Better transfer of nutrients
_______ 3. The activation energy of a reaction can be lowered by
a. Adding substrate
_______ 4. Peroxisomes are associated with
a. Recycling of materials
_______5. Which help things move inside a cell?
a. Cilia & flagella
b. Microtubules & endoplasmic reticulum
_______6. Which process occurs in mitochondria?
a. CO2 + O2 -------- > H2O
_______7. When chromosomes are double-stranded, each strand is a
_______8. For many reactions, the Q10 is about
_______9. Which structures have a lot of RNA in them?
a. Mitochondrion & chloroplast
b. Lysosome & chromosome
_______10. In order for a mutation to have a significant biological effect, it needs to
a. Be dominant
b. Change tertiary structure
_______11. DNA replication produces
a. A strand one way and Okazaki fragments the other way
_______12. High chromosome numbers can produce problems during
a. Cell division
b. DNA copying
_______13. DNA polymerase begins to do its job where this molecule hooks to the DNA.
_______14. In prokaryotes, duplicate chromosomes separate by attaching to
a. Spindle fibers
b. The membrane
_______15. Which is the most logical feature of a cell whose main function is absorption?
a. Cell wall
_______16. Metals and minerals often show up in biological systems as part of
a. Vitamins and salts
b. Cofactors and prosthetic groups
_______17. In a ______ reaction, the ______ reaction feeds energy into the _______ reaction.
_______18. Cell membrane phospholipids are made up of
a. Glycerol, 2 fatty acids, and a phosphate group
Pick NINE questions to answer in the spaces
Select and answer completely any four
of the following questions.
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.
In genetics, what is the location effect on expression? Three Points.
For Two Points each, what letters are used to represent reaction rates?
How does compartmentalizing a cell contribute to efficiency in its chemistry? Three Points.
What two high-funding research areas are interested in telomeres? Two Points each. For Three Points each, what is each area trying to accomplish with the telomeres?
What are anticodons? Three Points.
What sorts of chemicals often show an ability to irreversibly inhibit enzymes? Three Points.
Intermediate filaments are classified two different ways, according to what two parameters? Two Points each.
What evolutionary implication can be taken from the fact that actin molecules are remarkably similar in a wide variety of organisms? Three Points.
It turns out that mitochondria do have their own particular ribosomes. Why was it logical to expect that? Four Points.