Biology Midterm Practice Test

41 Questions | Total Attempts: 245

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Biology Midterm Practice Test

Questions and Answers
  • 1. 
    Mrs. Lewis set up a lab for her biology students using a culture of the small crustacean Daphnia, obtained from a pond that was 20°C. The students are to investigate the effect temperature has on Daphnia. The students will observe the crustacean’s heartbeat under the microscope, at the following temperatures: 0°C, 10°C, 20°C, 30°C, and 40°C. They will count the number of heartbeats per second. If the experiment is designed correctly, what will the students choose for the experimental treatment?
    • A. 

      Placing 5 identical cultures of Daphnia at 20C

    • B. 

      Placing each of 5 identical cultures of Daphnia at a different temperature

    • C. 

      Placing 5 cultures, each with a different type of crustacean, at 20C

    • D. 

      Placing 5 cultures, each with a different type of crustacean, at a different temperature

  • 2. 
    Mrs. Lewis set up a lab for her biology students using a culture of the small crustacean Daphnia, obtained from a pond that was 20°C. The students are to investigate the effect temperature has on Daphnia. The students will observe the crustacean’s heartbeat under the microscope, at the following temperatures: 0°C, 10°C, 20°C, 30°C, and 40°C. They will count the number of heartbeats per second. What is the dependent variable in Mrs. Lewis’ experiment?
    • A. 

      Number of heartbeats/second

    • B. 

      Number of Daphnia in the cultures

    • C. 

      Temperature of the samples

    • D. 

      Type of microscope used

  • 3. 
    Mrs. Lewis set up a lab for her biology students using a culture of the small crustacean Daphnia, obtained from a pond that was 20°C. The students are to investigate the effect temperature has on Daphnia. The students will observe the crustacean’s heartbeat under the microscope, at the following temperatures: 00C, 100C, 200C, 300C, and 400C. They will count the number of heartbeats per second. What is the independent variable in Mrs. Lewis’ experiment?
    • A. 

      Number of heartbeats/second

    • B. 

      Number of Daphnia in the cultures

    • C. 

      Temperature of the samples

    • D. 

      Type of microscope used

  • 4. 
    After learning about viruses in Biology class, Sam decides to have his cat vaccinated against feline leukemia virus. According to cell theory, are viruses, such as feline leukemia, considered living things?
    • A. 

      Yes, because they can reproduce.

    • B. 

      Yes, because they are composed of cells.

    • C. 

      No, because they cannot evolve.

    • D. 

      No, because they are not composed of cells.

  • 5. 
    The presence of which structure indicates that cells are NOT bacteria?
    • A. 

      Cell wall

    • B. 

      Chloroplast

    • C. 

      DNA

    • D. 

      Ribosome

  • 6. 
    Which of the following body systems produces hormones that are essential for the regulation of the human reproductive cycle?
    • A. 

      Circulatory

    • B. 

      Endocrine

    • C. 

      Lymphatic/Immune

    • D. 

      Nervous

  • 7. 
    Which physiological system includes the lungs, trachea, and pharynx?
    • A. 

      Endocrine

    • B. 

      Nervous

    • C. 

      Reproductive

    • D. 

      Respiratory

  • 8. 
    Water is the universal solvent. Why?
    • A. 

      Water exhibits strong cohesion.

    • B. 

      Water has a high specific heat.

    • C. 

      Water is a polar molecule.

    • D. 

      Water is easily ionized.

  • 9. 
    What will happen if an acid is added to a solution?
    • A. 

      The concentration of hydroxide ions (OH-) will increase.

    • B. 

      The concentration of hydrogen ions (H+) will increase.

    • C. 

      The pH will not change.

    • D. 

      The pH will increase.

  • 10. 
    Papain, an enzyme in papaya, breaks down polymers composed of amino acids. Which of the following substances does papain break down?
    • A. 

      Carbohydrates

    • B. 

      Fatty acids

    • C. 

      Nucleic acids

    • D. 

      Proteins

  • 11. 
    Which of the following chemical formulas represents an organic molecule? (note: the numbers should be read as subscripts NOT coefficients)
    • A. 

      NaCl

    • B. 

      C12H22O11

    • C. 

      AgNO3

    • D. 

      H2O

  • 12. 
    An organelle found in a liver cell would best be identified as a lysosome if its primary function was which of the following?
    • A. 

      Processing and packaging of cellular materials prior to export

    • B. 

      Harvesting of light energy to produce carbohydrates

    • C. 

      Detoxification of poisonous molecules within the cell

    • D. 

      Digestion of macromolecules and old organelles

  • 13. 
    What effect do acids have on how an enzyme works?
    • A. 

      Antacids break the covalent bonds within pepsin.

    • B. 

      Pepsin dissolves antacids in the gastric juice.

    • C. 

      The active site of pepsin changes shape.

    • D. 

      The concentration of pepsin increases.

  • 14. 
    What trait of an ATP molecule enables it to store energy for use by cells?
    • A. 

      Its small size

    • B. 

      Its solubility in water

    • C. 

      Its ability to form hydrogen bonds

    • D. 

      Its bonds between phosphate groups

  • 15. 
    In an experiment, a scientist filled 2 open flasks, as shown in the figures, with broth and boiled the broth until it became clear. He then left the flasks open for several days. Which results showed that spontaneous generation did NOT occur?
    • A. 

      The broth in both Flasks A and B remained clear.

    • B. 

      The broth in both Flasks A and B became cloudy.

    • C. 

      The broth in Flask A remained clear, and the broth in Flask B became cloudy.

    • D. 

      The broth in Flask A became cloudy, and the broth in Flask B remained clear.

  • 16. 
    Which of the following statements most accurately describes the difference between an ionic bond and a covalent bond?
    • A. 

      Atoms held together by ionic bonds separate when placed in water, while atoms held together by covalent bonds do not separate in water.

    • B. 

      Ionic bonds hold together atoms of two different types, while covalent bonds hold together atoms of the same type.

    • C. 

      Electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond.

    • D. 

      Ionic bonds form between atoms that carry opposite charges, while covalent bonds form between uncharged atoms.

  • 17. 
    Energy is released from ATP when a phosphate group is removed to form ADP and water is split apart. This is an example of which kind of reaction?
    • A. 

      Condensation

    • B. 

      Polymerization

    • C. 

      Hydrolysis

    • D. 

      Oxidation

  • 18. 
    Refer to the illustration above. Molecules like this are found in
    • A. 

      Carbohydrates.

    • B. 

      Lipids.

    • C. 

      Nucleic acids.

    • D. 

      Proteins.

  • 19. 
    Refer to the illustration above. Molecules like this are found in
    • A. 

      Carbohydrates.

    • B. 

      Lipids.

    • C. 

      Nucleic acids.

    • D. 

      Proteins.

  • 20. 
    Lipids are
    • A. 

      Polar molecules.

    • B. 

      Similar to water molecules.

    • C. 

      Protein molecules.

    • D. 

      Nonpolar molecules.

  • 21. 
    Energy is released when the bond between
    • A. 

      Carbon atoms in ATP is broken.

    • B. 

      Ribose and adenine in ATP is broken.

    • C. 

      Phosphate groups in ATP is broken.

    • D. 

      Two ATP molecules is broken.

  • 22. 
    Carbon atoms can bond together to form all of the following EXCEPT
    • A. 

      Ring structures.

    • B. 

      Inorganic structures.

    • C. 

      Straight chain structures.

    • D. 

      Branched structures.

  • 23. 
    What is the primary function of most epithelial tissues?
    • A. 

      Contracting under voluntary control

    • B. 

      Joining bones and muscles together

    • C. 

      Lining internal or external surfaces of the body

    • D. 

      Conducting electrochemical signals

  • 24. 
    This is a picture of ___ tissue.
    • A. 

      Blood

    • B. 

      Bone

    • C. 

      Nerve

    • D. 

      Muscle

  • 25. 
    This is a picture of ___ tissue.
    • A. 

      Blood

    • B. 

      Bone

    • C. 

      Nerve

    • D. 

      Muscle

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