BI 171 - Third Exam - 2006
Place the letter of the choice that
best answers the question on the line to the left.
Each question's number is linked to the relevant part of the online book, if possible (some questions relate to multiple sections).
_______ 1. Cells swell up and pop when placed into what sort of solution?
a. Hypertonic b. Hydrotonic c. Isotonic d. Hypotonic e. Popotonic
_______ 2. In coupled reactions, what exactly are the couples?
a. Exergonic reactions
b. Endergonic reactions
3. Under normal conditions, pond
amebas have more ions in the cytoplasm than are found in the
b. Passive transport
c. Active transport
_______ 4. What is the most likely function of a cell that has lots of microvilli?
c. Moving from place to place
_______ 5. A nucleosomeís main function is in
a. DNA processing
b. RNA storage
c. Spindle formation
_______ 6. Intermediate filaments are often found in cells that
a. Are actively swimming
b. Are photosynthesizing
_______ 7. Okazaki fragments are found
a. On transfer RNA
b. On one side of DNA
c. In the nucleolus
_______ 8. A cell that produces secretions should have lots of
b. Golgi bodies
c. Endoplasmic reticulum
_______ 9. A central vacuole serves the function of
a. A second nucleus
b. Pumping out water
c. Providing structure
_______ 10. The "fluid" part of the fluid mosaic model refers to
a. Osmosis b. Phospholipids c. Cilia d. DNA replication e. Papaya juice
_______ 11. During apoptosis, a cell should make more
b. Food vacuoles
c. Golgi bodies
_______ 12. Two chromatids are held together by the
_______ 13. Which allow movement in opposite directions on microtubules?
a. Actin & myosin
b. Dynein & kinesin
_______ 14. Which are almost "mirror images" of each other?
a. Prophase and telophase
b. Interphase and prophase
_______ 15. Which is surrounded by an envelope?
c. Animal cell
_______ 16. In group translocation
a. Materials move in both directions through a membrane
_______ 17. For point mutations,
a. The changes are too small to have any effects
_______ 18. Shifts in pH affect enzyme activity because
a. The varying amount of water puts pressure on the molecules
Pick NINE questions to answer in the spaces provided.
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.
How is the fact that chimpanzees have 2 more chromosomes than humans used to support the idea that we share a recent common ancestor? Three Points.
What two different areas of medical research are particularly interested in telomeres? Two Points Each.
Many reactions that happen in cells are not reversible in any practical way. Why not? Three Points.
What makes vitamin an odd biological term? Three Points.
For Three Points Each, what are the two different ways to classifyintermediate filaments?
When graphing reaction rates over temperature ranges, what sort of organisms tend to have very broad curves that are not very high? Three Points.
Root pressure is counteracted by what other force? Three Points.
For Three Points Each, give two Kingdoms in which all of the cells have cell walls.
GENE TRANSLATION TABLE
CODONS ON MESSENGER RNA