Star Testing Practice Biology

127 Questions | Total Attempts: 105

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Star Testing Practice Biology

Questions and Answers
  • 1. 
    A computer model of cellular mitosis can simulate the aspects of cellular division quite well. However, microscopic observation of actual cellular mitosis can improve understanding because actual observations  
    • A. 

      May reveal greater unknown complexities

    • B. 

      Are easier than a computer model to view

    • C. 

      Are the same each time

    • D. 

      May provide division events in sequence.

  • 2. 
    The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and  glucose to pass through. Because other substances are blocked from entering, this membrane is called  
    • A. 

      Perforated

    • B. 

      Semi-permeable

    • C. 

      Non-conductive

    • D. 

      Permeable.

  • 3. 
    There are many different enzymes located in the cytoplasm of a single cell. How is a specific enzyme able to catalyze a specific reaction? 
    • A. 

      Different enzymes are synthesized in specific areas of the cytoplasm.

    • B. 

      Most enzymes can catalyze many different reactions

    • C. 

      An enzyme binds to a specific substrate (reactant) for the reaction catalyzed

    • D. 

      Enzymes are transported to specific substrates (reactants) by ribosomes.

  • 4. 
    Maltose can be broken down into glucose molecules by the enzyme maltase. Which of the following would slow the reaction rate
    • A. 

      Adding maltase

    • B. 

      Adding maltose

    • C. 

      Removing glucose

    • D. 

      Diluting with water

  • 5. 
    A food chain is shown below.   Grass -- crickets --  field mice -- hawks   For the food chain shown, which of the following changes would have the most severe consequences?  
    • A. 

      A drastic decrease in rainfall, causing drought

    • B. 

      The poaching of predatory hawks by game hunters

    • C. 

      The introduction of a second predator that eats field mice

    • D. 

      A parasitic infestation that reduces the cricket population

  • 6. 
    The first stage of photosynthesis in a chloroplast is
    • A. 

      Light-dependent.

    • B. 

      temperature-dependent

    • C. 

      Glucose-driven.

    • D. 

      ATP-driven

  • 7. 
    The plasma membrane of a cell consists of 
    • A. 

      Protein molecules arranged in two layers with polar areas forming the outside of the membrane

    • B. 

      Two layers of lipids organized with the nonpolar tails forming the interior of the membrane

    • C. 

      Lipid molecules positioned between two carbohydrate layers

    • D. 

      Protein molecules with polar and nonpolar tails

  • 8. 
    Which of the following is a function of the nervous system? 
    • A. 

      Releasing ATP into contracting muscle tissues

    • B. 

      Signaling muscle tissues to contract

    • C. 

      Producing lactic acid in fatigued muscle tissues

    • D. 

      Increasing cellular respiration in muscle tissues

  • 9. 
    Which of the following is a function of the nervous system? 
    • A. 

      Releasing ATP into contracting muscle tissues

    • B. 

      Signaling muscle tissues to contract

    • C. 

      Producing lactic acid in fatigued muscle tissues

    • D. 

      Increasing cellular respiration in muscle tissues

  • 10. 
    What is the greatest danger to a patient who has had damage to the skin? 
    • A. 

      Loss of oils produced by the skin

    • B. 

      Excessive muscle contractions in the damaged area

    • C. 

      Infections in uncovered tissues

    • D. 

      Damaged tissue entering the blood stream

  • 11. 
    A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. How will genetic drift probably affect this population? 
    • A. 

      It will accelerate the appearance of new traits

    • B. 

      It will promote the survival of chimpanzees with beneficial traits

    • C. 

      It will increase the number of alleles for specific traits

    • D. 

      It will reduce genetic diversity

  • 12. 
    In fruit flies, the gene for red eyes (R) is dominant and the gene for pink eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?  
    • A. 

      RR only

    • B. 

      Rr only

    • C. 

      Rr and rr only

    • D. 

      RR, Rr, and rr only

  • 13. 
    In aerobic respiration, the Krebs cycle (citric acid cycle) takes place in 
    • A. 

      Chloroplasts

    • B. 

      Nuclei

    • C. 

      Lysosomes

    • D. 

      Mitochondria

  • 14. 
    Which cellular organelle is responsible for packaging the proteins that the cell secretes
    • A. 

      Cytoskeleton

    • B. 

      Cell membrane

    • C. 

      Lysosomes

    • D. 

      Golgi Apparatus

  • 15. 
    Which of the following best describes meiosis?
    • A. 

      It is carried out in all tissues that require cell replacement

    • B. 

      It occurs only in cells in the reproductive structures of the organism

    • C. 

      It happens in all tissues except the brain and spinal cord

    • D. 

      It is the first stage of mitosis.

  • 16. 
    Which of these organisms are most helpful in preventing Earth from being covered with the bodies of dead organisms
    • A. 

      Herbivores

    • B. 

      Producers

    • C. 

      Parasites and viruses

    • D. 

      Fungi and bacteria

  • 17. 
    Eukaryotic cells are differentiated from prokaryotic cells because eukaryotic cells  
    • A. 

      Are much smaller.

    • B. 

      Have permeable membranes

    • C. 

      Have a higher rate of reproduction

    • D. 

      Have nuclei.

  • 18. 
    Two students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. Which of the following could be an unavoidable source of experimental error? 
    • A. 

      Length of the study

    • B. 

      Variation in the strawberry plants

    • C. 

      The cost of watering the plants

    • D. 

      Fertilization during the study

  • 19. 
    Mendel hypothesized that reproductive cells have only one factor for each inherited trait. This hypothesis is supported by the observation that
    • A. 

      Haploid cells are produced by mitosis

    • B. 

      Diploid cells are produced by mitosis

    • C. 

      Haploid cells are produced by meiosis.

    • D. 

      Diploid cells are produced by meiosis

  • 20. 
    A signal that the bladder is full is sent to the central nervous system by  
    • A. 

      Feedback loops.

    • B. 

      Sensory neurons

    • C. 

      Nephron tubules

    • D. 

      Receptor proteins

  • 21. 
    Which of these best illustrates natural selection?  
    • A. 

      An organism with favorable genetic variations will tend to survive and breed successfully.

    • B. 

      A population monopolizes all of the resources in its habitat, forcing other species to migrate.

    • C. 

      A community whose members work together utilizes all existing resources and migratory routes.

    • D. 

      The largest organisms in a species receive the only breeding opportunities

  • 22. 
    A cell from heart muscle would probably have an unusually high proportion of
    • A. 

      Lysosomes

    • B. 

      Mitochondria

    • C. 

      MRNA

    • D. 

      Golgi Bodies

  • 23. 
    Which of the following sequences represents chromosome number during fertilization? 
    • A. 

      N+n→2n

    • B. 

      2n →n+n

    • C. 

      N → n

    • D. 

      2n →2n

  • 24. 
    Based only on the sex chromosomes in typical human egg and sperm cells at fertilization, the probability of producing a female is 
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      90%

  • 25. 
    In certain breeds of dogs, deafness is due to a recessive allele (d) of a particular gene, and normal hearing is due to its dominant allele (D). What percentage of the offspring of a normal heterozygous (Dd) dog and a deaf dog (dd) would be expected to have normal hearing? 
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      100%

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