MCAT Biology practice questions

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brittiny4893
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246379
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MCAT Biology practice questions
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2013-11-11 18:07:53
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practice questions
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  1. All of the following are components of the Cell Theory EXCEPT:
    A) all living things are composed of cells.
    B) cooperation among cells allows for complex functioning in living things.
    C) all cells arise from pre-existing cells.
    D) all living things possess mitochondria.
    D) all living things possess mitochondria.
    (this multiple choice question has been scrambled)
  2. Upon bacteriophage infection, the host cell is directed to synthesize viral protein. A scientist wishing to study the location of this process in the cell might use:
    A) centrifugation.
    B) autoradiography.
    C) electrophoresis.
    D) phase contrast microscopy.
    B) autoradiography.
    (this multiple choice question has been scrambled)
  3. A student is trying to determine the type of membrane transport occurring in a cell. She finds that the molecule to be transported is very large and polar, and when transported across the membrane, no ATP is used. Which of the following is the most likely mechanism of transport?
    A) exocytosis.
    B) facilitated diffusion.
    C) active transport.
    D) simple diffusion.
    B) facilitated diffusion.
    (this multiple choice question has been scrambled)
  4. Which of the following is NOT a type of tissue found in the human body?
    A) connective tissue.
    B) nervous tissue.
    C) adipose tissue.
    D) cytoplasmic tissue.
    D) cytoplasmic tissue.
    (this multiple choice question has been scrambled)
  5. Which of the following types of nucleic acid will never be found in a virus?
    A) single- and double-stranded RNA.
    B) single-stranded DNA.
    C) double-stranded DNA.
    D) all of these can be found in a virus.
    D) all of these can be found in a virus.
    (this multiple choice question has been scrambled)
  6. Which of the following activities occurs in the Golgi apparatus?
    A) modification and packaging of proteins.
    B) photosynthesis.
    C) synthesis of proteins.
    D) breakdown of lipids and carbohydrates.
    A) modification and packaging of proteins.
    (this multiple choice question has been scrambled)
  7. Mitochondrial DNA
    A) is important in the synthesis of mitochondrial ribosomes.
    B) is circular.
    C) is self-replicating.
    D) both A and B.
    D) both A and B.
    (this multiple choice question has been scrambled)
  8. Which of the following is NOT a function of the smooth endoplasmic reticulum?
    A) transport of proteins.
    B) protein synthesis.
    C) lipid synthesis.
    D) poison detoxification.
    B) protein synthesis.
    (this multiple choice question has been scrambled)
  9. What is the main function of the nucleolus?
    A) DNA synthesis.
    B) ribosomal RNA synthesis.
    C) chromosome assembly.
    D) cell division.
    B) ribosomal RNA synthesis.
    (this multiple choice question has been scrambled)
  10. In which of the following organelles is pH the lowest?
    A) lysosomes.
    B) rough ER.
    C) mitochondria.
    D) chloroplasts.
    A) lysosomes.
    (this multiple choice question has been scrambled)
  11. Which of the following is NOT a difference that would allow one to distinguish between a prokaryotic and a eukaryotic cell?
    A) membrane-bound vs. no membrane-bound organelles.
    B) presence or absence of the nucleus.
    C) ribosomal subunit weight.
    D) presence or absence of the cell wall.
    D) presence or absence of the cell wall.
    (this multiple choice question has been scrambled)
  12. A researcher treats a solution containing animal cells with ouabain, a poisonous substance that interferes with the Na+/K- -ATPase, embedded in the cell membrane and causes the cell to lyse. Which of the following statements best explains ouabain's mechanism of action?
    A) treatment with ouabain results in high levels of extracellular K+ and Na+.
    B) treatment with ouabain results in high levels of extracellular Ca+.
    C) treatment with ouabain increases intracellular concentrations of Na+.
    D) treatment with ouabain decreases intracellular concentrations of Na+.
    C) treatment with ouabain increases intracellular concentrations of Na+.
    (this multiple choice question has been scrambled)
  13. Which of the following is NOT involved in cell movement?
    A) cilia.
    B) actin.
    C) flagella.
    D) centrioles.
    D) centrioles.
    (this multiple choice question has been scrambled)

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