Biology Practice Test #5

39 Questions | Total Attempts: 55

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Biology Practice Test #5

Questions and Answers
  • 1. 
    A scientist found that the results of an experiment did not support her hypothesis. If she is following proper scientific procedure, what should she do next?
    • A. 

      Discard those results and repeat the experiment.

    • B. 

      Accept the hypothesis and exclude data that does not fit.

    • C. 

      Reject the hypothesis and assume it is incorrect.

    • D. 

      Create a new hypothesis and a new experiment to test it.

  • 2. 
    The graph provides information about the size of 1 rabbit population over 30 generations. What most likely happened shortly after the 10th generation to cause the change in population between Points A and B?
    • A. 

      A fatal disease infected the rabbits.

    • B. 

      Area farmers set traps for coyotes.

    • C. 

      The average temperature decreased by 0.5 oC.

    • D. 

      The average monthly rainfall increased by 0.25 in.

  • 3. 
    Dr. Hansen performs an experiment testing the effectiveness of different cough syrups. Identify the independent variable in the experiment.
    • A. 

      Type of cough syrup

    • B. 

      Flavor of the cough syrup

    • C. 

      Number of people taking each cough syrup

    • D. 

      Number of days people take each cough syrup

  • 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 adapt to their environment.

    • D. 

      No, because they are not composed of cells.

  • 5. 
    Which sequence is in order from the simplest level of organization to the most complex?
    • A. 

      Muscle, erythrocyte, lipid, mitochondrion, carbon

    • B. 

      Carbon, lipid, erythrocyte, mitochondrion, muscle

    • C. 

      Muscle, mitochondrion, lipid, erythrocyte, carbon

    • D. 

      Carbon, lipid, mitochondrion, erythrocyte, muscle

  • 6. 
    Carbon-14 is a radioactive isotope used to determine the age of ancient objects composed of organic matter. Carbon-12 and carbon-13 are other isotopes of carbon. The number of what subatomic particles varies among these carbon isotopes?
    • A. 

      Electrons

    • B. 

      Neutrons

    • C. 

      Photons

    • D. 

      Protons

  • 7. 
    As part of an experiment, a student adds 10 mL of 5% hydrochloric acid solution to 100 mL of a non-buffered, colorless solution of sugar. What is the most likely result?
    • 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.

  • 8. 
    A Paramecium lives in an environment that is hypotonic to its cytoplasm. how does the Paramecium maintain homeostasis under these conditions?
    • A. 

      It expels excess water using contractile vacuoles.

    • B. 

      It expels excess sodium using the sodium-potassium pump.

    • C. 

      It absorbs additional water through osmosis.

    • D. 

      It absorbs additional sodium through facilitated diffusion.

  • 9. 
    After Harrison adds a chemical to cells growing in a test tube, proteins accumulate in the cells' endoplasmic reticula. The chemical prevents movement of proteins from the endoplasmic reticulum to which organelle?
    • A. 

      Golgi apparatus

    • B. 

      Lysosome

    • C. 

      Mitochondrion

    • D. 

      Ribosome

  • 10. 
    What is the purpose of mitosis?
    • A. 

      To produce 2 cells, each with 1 complete set of chromosomes

    • B. 

      To produce 2 cells, each with half the normal number of chromosomes

    • C. 

      To produce 4 cells, each with 1 complete set of chromosomes

    • D. 

      To produce 4 cells, each with half the normal number of chromosomes

  • 11. 
    While investigating yeast respiration, a researcher detects ethanol in the yeast culture. Which molecules does the yeast culture also contain?
    • A. 

      Lactic acid and ATP

    • B. 

      Oxygen and lactic acid

    • C. 

      Carbon dioxide and ATP

    • D. 

      Oxygen and carbon dioxide

  • 12. 
    Red blood cells have a salt content of 0.9%. When a microbiologist places red blood cells in pure water, osmosis occurs. What net movement of a substance occurs in this instance of osmosis?
    • A. 

      Water molecules move out of the cells.

    • B. 

      Water molecules move into the cells.

    • C. 

      Salt ions move out of the cells.

    • D. 

      Salt ions move into the cells.

  • 13. 
    Which is the LEAST likely trait of an organic molecule?
    • A. 

      The molecules may exist as isomers.

    • B. 

      The backbone is linear, cyclic, or branched.

    • C. 

      Ionic bonds are present between the atoms.

    • D. 

      Functional groups, such as alcohols, are present.

  • 14. 
    Cosmetics often contain glycerol (C3H8O3), which has three identical functional groups. Which type of bond holds these functional groups together?
    • A. 

      Covalent

    • B. 

      Hydrogen

    • C. 

      Intermolecular

    • D. 

      Ionic

  • 15. 
    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 phosphate-phosphate bond

  • 16. 
    What combine with sugar and a phosphate group to form a nucleotide?
    • A. 

      Amino acid

    • B. 

      Deoxyribose

    • C. 

      Glycerol

    • D. 

      Nitrogenous base

  • 17. 
    Adrenoleukodystrophy (ALD) is a sex-linked recessive trait that affects the nervous system. In one family, the father, mother, daughter, and elder son do not have ALD, while the younger son has ALD. Who must be a carrier of the ALD allele?
    • A. 

      Father

    • B. 

      Mother

    • C. 

      Daughter

    • D. 

      Elder son

  • 18. 
    Cystic fibrosis is a genetic disease in which mucus accumulates in the lungs and digestive system of affected individuals. Males and females must inherit 2 alleles with this mutation to have the disease. What is the mode of inheritance of cystic fibrosis?
    • A. 

      Autosomal dominant

    • B. 

      Autosomal recessive

    • C. 

      Sex-linked dominant

    • D. 

      Sex-linked recessive

  • 19. 
    Which event of meiosis reveals the mechanism for understanding Mendel's laws of segregation and independent assortment?
    • A. 

      Chromosome number is reduced during telophase I so gametes have half the standard number of chromosomes.

    • B. 

      The arrangement of homologous chromosomes during metaphase I varies from cell to cell.

    • C. 

      Centromeres break apart during anaphase II so that sister chromatids can move to opposite poles of the cell.

    • D. 

      DNA is replicated during interphase before chromosomes condense and become attached to kinetochores.

  • 20. 
    During what phase of meiosis does nondisjunction occur?
    • A. 

      Metaphase I

    • B. 

      Anaphase I

    • C. 

      Prophase II

    • D. 

      Metaphase II

  • 21. 
    Keisha passes a local dairy farm that has many brown cows, but only a few white cows. A dominant allele produces brown hair in cows and a recessive allele produces white hair. Which characteristic of any brown cow can Keisha identify?
    • A. 

      The genotype of both of the cow's parents.

    • B. 

      The genotype of the cow's hair color.

    • C. 

      The phenotype of both of the cow's parents.

    • D. 

      The phenotype of the cow's hair color.

  • 22. 
    What process of natural selection favors the extreme phenotypes of a trait and eliminates intermediate phenotypes?
    • A. 

      Directional selection

    • B. 

      Disruptive selection

    • C. 

      Random selection

    • D. 

      Stabilizing selection

  • 23. 
    According to fossil evidence, whales evolved from 4-legged ancestors. The modern baleen whale has forelimbs, but inspection of its skeleton reveals only tiny vestigial hind limbs. What is the best explanation for this loss of hind limbs in the baleen whale?
    • A. 

      The hind limbs adapted into flippers to help the whale swim faster.

    • B. 

      Random chance and genetic drift led to the reduction in size of hind limbs.

    • C. 

      Whales with shorter hind limbs swam faster than those with longer hind limbs.

    • D. 

      Some whales lost longer hind limbs to predators and passed that trait to their offspring.

  • 24. 
    Which criterion is NOT necessarily true of a trait that has evolved through natural selection?
    • A. 

      It is heritable.

    • B. 

      It varies among individuals.

    • C. 

      It increases individuals' life spans.

    • D. 

      It influences individuals' reproductive success.

  • 25. 
    What accounts for genetic biodiversity existing in modern multicellular organisms?
    • A. 

      Mutations in gametes are passed to offspring.

    • B. 

      Protein mutations cause DNA changes, creating new species.

    • C. 

      Genetic mutations form when similar species mate and reproduce.

    • D. 

      Somatic cell DNA mutations create new phenotypes in the population.

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