Biology 1-8 cumulative

Last update by dangkathy04 on 05/03/2014
506110 People have viewed this Quiz
  • Share

Which of these are not embedded in the hydrophobic portion of the lipid bilayer at all?



A. integrins B. glycoproteins C. integral proteins D. peripheral proteins
E. transmembrane proteins

Answer:
D. peripheral proteins

View Biology 1-8 cumulative as Flashcard Deck

Related Quiz Content
  • smiraclelynch
    Which of the following statements is true concerning catabolic pathways?



    A. They combine molecules into more energy-rich molecules. B. They supply energy, primarily in the form of ATP, for the cell's work.
    C. They build up complex molecules such as protein from simpler compounds. D. They are spontaneous and do not need enzyme catalysis. E. They are endergonic.
    B. They supply energy, primarily in the form of ATP, for the cell's work.
  • smiraclelynch
    According to the induced fit hypothesis of enzyme catalysis, which of the following is correct?



    A. The binding of the substrate depends on the shape of the active site. B. Some enzymes change their structure when activators bind to the enzyme. C. The active site creates a microenvironment ideal for the reaction. D. A competitive inhibitor can outcompete the substrate for the active site. E. The binding of the substrate changes the shape of the enzyme's active site.
    E. The binding of the substrate changes the shape of the enzyme's active site.
  • smiraclelynch
    Which of the following best describes enthalpy (H)?



    A. the condition of a cell that is not able to react B. the cell's energy equilibrium C. the system's entropy D. the heat content of a chemical system E. the total kinetic energy of a system
    D. the heat content of a chemical system
  • smiraclelynch
    When glucose monomers are joined together by glycosidic linkages to form a cellulose polymer, the changes in free energy, total energy, and entropy are as follows:




    A. -ΔG,+ΔH,+ΔS.
    B. +ΔG,+ΔH,-ΔS.

    C. -ΔG, -ΔH,-ΔS.
    D. +ΔG,+ΔH,+ΔS.
    E. +ΔG, -ΔH,-ΔS.
    B. +ΔG,+ΔH,-ΔS.
  • smiraclelynch
    or the hydrolysis of ATP to ADP + i, the free energy change is -7.3 kcal/mol under standard conditions (1 M concentration of both reactants and products). In the cellular environment, however, the free energy change is about -13 kcal/mol. What can we conclude about the free energy change for the formation of ATP from ADP and i under cellular conditions?




    A. It is less than +7.3 kcal/mol.
    B. It is about +13 kcal/mol.

    C. It is greater than +13 kcal/mol.
    D. It is +7.3 kcal/mol.
    E. The information given is insufficient to deduce the free energy change.
    B. It is about +13 kcal/mol.
  • smiraclelynch
    Which of the following is most similar in structure to ATP?





    A. an amino acid with three phosphate groups attached
    B. a pentose sugar
    C. a DNA nucleotide
    D. a phospholipid
    E. an RNA nucleotide

    E. an RNA nucleotide
  • smiraclelynch
    When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?





    A. It is used to power yet more cellular work.
    B. It is used to store energy as more ATP.
    C. It is transported to specific organs such as the brain.
    D. It is used to generate ADP from nucleotide precursors.
    E. It is lost to the environment.
    E. It is lost to the environment.
  • smiraclelynch
    Which of the following is true of enzymes?





    A. Enzyme function is increased if the 3-D structure or conformation of an enzyme is altered.
    B. Nonprotein cofactors alter the substrate specificity of enzymes.
    C. Enzyme function is independent of physical and chemical environmental factors such as pH and temperature.
    D. Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
    D. Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
  • smiraclelynch
    Protein kinases are enzymes that transfer the terminal phosphate from ATP to an amino acid residue on the target protein. Many are located on the plasma membrane as integral membrane proteins or peripheral membrane proteins. What purpose may be served by their plasma membrane localization?





    A. Membrane localization lowers the activation energy of the phosphorylation reaction.
    B. They flip back and forth across the membrane to access target proteins on either side.
    C. They can more readily encounter and phosphorylate other membrane proteins.

    D. They require phospholipids as a cofactor.
    E. ATP is more abundant near the plasma membrane.
    C. They can more readily encounter and phosphorylate other membrane proteins.
  • smiraclelynch
    When you have a severe fever, what grave consequence may occur if the fever is not controlled?





    A. change in the tertiary structure of your enzymes

    B. binding of your enzymes to inappropriate substrates
    C. destruction of your enzymes' primary structure
    D. removal of amine groups from your proteins
    E. removal of the amino acids in active sites of your enzymes
    A. change in the tertiary structure of your enzymes
  • smiraclelynch
    Succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by malonic acid, which resembles succinate but cannot be acted upon by succinate dehydrogenase. Increasing the ratio of succinate to malonic acid reduces the inhibitory effect of malonic acid.


    Based on this information, which of the following is correct?





    A. Fumarate is the product, and malonic acid is a noncompetitive inhibitor.
    B. Succinate is the substrate, and fumarate is the product.

    C. Succinate dehydrogenase is the enzyme, and malonic acid is the substrate.
    D. Succinate dehydrogenase is the enzyme, and fumarate is the substrate.
    E. Malonic acid is the product, and fumarate is a competitive inhibitor.
    B. Succinate is the substrate, and fumarate is the product.