BMS100 Past Test Questions
Chapter 3, Spring 2009
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  1. Organelles, such as mitochondria, are present in the
    1. cytoplasm of the cell
    2. nucleus of the cell
    3. both cytoplasm and nucleus
    4. neither cytoplasm nor nucleus

  2. The membranes of human cells contain mainly
    1. lipids and protein
    2. water and carbohydrates
    3. protein and carbohydrates
    4. protein and nucleic acids

  3. It is the function of _?_ to convert the energy in various fuels into energy in ATP.
    1. nucleus
    2. mitochondria
    3. plasma membrane
    4. sodium transporters ("pumps")

  4. Diffusion and osmosis are considered _?_ processes.
    1. active
    2. passive
    3. non-homeostatic
    4. both B. and C.

  5. Which one of the following passes easily through a cell membrane without the aid of channels??
    1. glucose
    2. carbon dioxide
    3. potassium ions
    4. negative ions such as chloride ions

  6. A transport process will be considered "active" if it requires the use of
    1. osmosis
    2. energy
    3. chromatin
    4. triglycerides

  7. The channels that control the passage of ions into or out of cells are made of
    1. ATP
    2. protein
    3. chromatin
    4. microtubules

  8. Which ions are typically transported into human cells in the greatest quantity?
    1. sodium ions
    2. hydrogen ions
    3. potassium ions
    4. phosphate ions

  9. Sodium ions are present at relatively high concentration in the fluids outside cells because
    1. they are generated during metabolism that occurs outside cells
    2. they constantly diffuse out of cells
    3. they are constantly "pumped" out of cells
    4. they collect there during nerve conduction


  10. In organs such as the brain, heart, and kidneys,
    1. the cells generate more oxygen (O2) than they consume
    2. the pressure (concentration) of O2 inside cells is greater than the pressure (conc.) of O2 outside cells
    3. O2 diffuses from a region of higher pressure (conc.) to a region of lower pressure(conc.)
    4. both B. and C.

  11. A major difference between chromatin and chromosomes is that
    1. chromatin is composed of DNA; chromosomes are composed of RNA
    2. chromatin is located in the nucleus; chromosomes are located in the cytoplasm
    3. chromosomes are highly structured, dense, and visible with microscopes; chromatin is relatively unstructured and "spread out"
    4. chromosomes are present in most cells most of the time; chromatin appears only when cells undergo mitosis

  12. Two phases of the cell cycle, in which cells divide, are
    1. active phase and passive phase
    2. interphase and mitosis
    3. transcription and translation
    4. carrier-mediated and noncarrier-mediated

  13. When do chromosomes with two (2) identical (or nearly identical) chromatids exist?
    1. throughout mitosis
    2. throughout the cell cycle
    3. during the early stages of mitosis (prior to anaphase)
    4. during the latter stages of mitosis (after metaphase)

  14. Which of the following are known for their high capacity for mitosis?
    1. sperm and oocytes
    2. stem cells
    3. heart muscle cells
    4. all types of "nerve cells" (neurons & neuroglia)

  15. A specific, physical segment of a DNA molecule that contains information for production of a protein is a
    A. base pair   B. gene   C. messenger   D. chromosome  

  16. Which of the following base pairs of DNA is correct?
    A. adenine/thymine   B. thymine/cytosine   C. guanine/adenine   D. guanine/thymine  

  17. DNA replication results in
    1. production of two molecules, each of which is half DNA, half RNA
    2. production of two DNA molecules, each of which is "half old, half new"
    3. production of an entirely new DNA molecule which is identical to the old DNA molecule
    4. production of an entirely new RNA molecule which is nearly identical to the original DNA molecule

  18. Genetic information most directly codes for the position of
    1. phospholipids in a membrane
    2. messengers entering the nucleus
    3. three nucleotides in a triglyceride
    4. amino acids in a polypeptide (protein)

  19. The DNA double helix "unzips"
    1. during DNA replication
    2. during transcription
    3. both of the above
    4. none of the above (hydrogen bonds prevent the DNA double helix from "unzipping")

  20. The "central dogma" refers to the flow of information
    1. from RNA to DNA to protein
    2. from protein to DNA to RNA
    3. from DNA to RNA to protein
    4. from DNA to RNA and protein simultaneously