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  1. What do these four elements have in common?

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    A. They all have an incomplete valence electron shell.
    B. They all have the same number of protons in their nuclei.
    C. They are all generally unreactive elements.
    D. They all have the same number of electrons in their first electron shell.
    A. They all have an incomplete valence electron shell.
  2. Which of the following accurately describes what is occurring in the illustrated reaction?

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    A. A single covalent bond is formed between carbon and each of the four hydrogen atoms.
    B. A hydrogen bond is formed between carbon and the four hydrogen atoms.
    C. A quadruple covalent bond is formed between carbon and one hydrogen atom.
    D. An ionic bond is formed between carbon and the four hydrogen atoms.
    A. A single covalent bond is formed between carbon and each of the four hydrogen atoms.
  3. What explains the negative charge on the oxygen atom within the water molecule?

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    A. Protons are transferred from oxygen to hydrogen during the formation of an ionic bond.
    B. Oxygen atoms have a stronger pull on the electrons shared within a covalent bond formed between oxygen and hydrogen.
    C. Hydrogen atoms have a stronger pull on the electrons shared within a covalent bond formed between oxygen and hydrogen.
    D. Electrons are transferred from hydrogen to oxygen during the formation of an ionic bond.
    B. Oxygen atoms have a stronger pull on the electrons shared within a covalent bond formed between oxygen and hydrogen.
  4. What is the classification of a solution with a pH of 8.3?

    A. buffered solution
    B. alkaline solution
    C. neutral solution
    D. acidic solution
    B. alkaline solution
  5. All amino acids (such as the four represented in the figure) contain ______.

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    A. phosphorous and nitrogen
    B. a nitrogen-containing base and a pentose sugar
    C. an amine group and a carboxyl group
    D. an amine group and a fatty acid
    C. an amine group and a carboxyl group
  6. Which of the following statements is true regarding the enzyme-catalyzed reaction (B) compared to the uncatalyzed reaction (A)?

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    A. The reaction in the presence of enzyme releases more energy.
    B. The products of the reaction with enzyme contain more chemical potential energy.
    C. The reaction in the presence of enzyme will form larger products.
    D. Less energy input is required to start the reaction in the presence of enzyme.
    E. All of the listed responses are true.
    D. Less energy input is required to start the reaction in the presence of enzyme.
  7. Which organic molecules form the major structural materials of the body?

    A. nucleic acids
    B. lipids
    C. carbohydrates
    D. proteins
    D. proteins
  8. Foods are broken down into their building blocks by adding water. This would be an example of which characteristic of water?




    B. Water acts as a reactant.
  9. Water acts to dissolve molecules in the body. How does water dissolve the salt (NaCl) in your mouth from a salty pretzel?



    C. Water acts as a solvent because the partial negative charge on the oxygen in water attracts sodium, while the partial positive charge on hydrogen attracts chloride. This results in the separation of sodium from chloride, thus breaking the ionic bond.
  10. In plasma, a typical body fluid, protein floating around would be considered to be which of the following?



    A. a solute, specifically both a colloid and an electrolyte
  11. Electrolytes are charged particles called ions that are dissolved in body fluids. Which of the
    following ions would be considered a major anion in the body?




    B. chloride
  12. Which pH is more acidic, a pH of 3, a pH of 7, or a pH of 9?



    C. pH of 3
  13. Cortisol is a type of lipid hormone. Which type of lipid would cortisol be classified as?



    A. steroid
  14. The three atoms shown represent different ______.

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    A. cells
    B. elements
    C. molecules
    D. isotopes
    D. isotopes
  15. Which four elements comprise approximately 96% of our body weight?

    A. carbon, oxygen, iron, and potassium
    B. carbon, oxygen, hydrogen, and potassium.
    C. carbon, oxygen, potassium, and sodium.
    D. carbon, oxygen, hydrogen, and nitrogen.
    D. carbon, oxygen, hydrogen, and nitrogen.
  16. Which of the following is the major positive ion outside cells?

    A. hydrogen
    B. potassium
    C. sodium
    D. magnesium
    C. sodium
  17. Which of the following is formed once the ions in the salt crystal have completely dissociated from one another?

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    A. a solution
    B. a buffer
    C. a suspension
    D. a colloid
    A. a solution
  18. Carbohydrates and proteins are built up from their basic building blocks by the ________.

    A. removal of a water molecule between each two units
    B. removal of a carbon atom between each two units
    C. addition of a water molecule between each two units
    D. addition of a carbon atom between each two units
    A. removal of a water molecule between each two units
  19. What level of protein synthesis is represented by the coiling of the protein chain backbone into an alpha helix?

    A. primary structure
    B. tertiary structure
    C. quaternary structure
    D. secondary structure
    D. secondary structure
  20. Carbohydrates are stored in the liver and muscles in the form of ________.

    A. glucose
    B. triglycerides
    C. cholesterol
    D. glycogen
    D. glycogen
  21. The single most abundant protein in the body is ________.

    A. hemoglobin
    B. DNA
    C. glucose
    D. collagen
    D. collagen
  22. Which of the following is not true of proteins?

    A. They may be denatured or coagulated by heat or acidity.
    B. Their function depends on their three-dimensional shape.
    C. They have both functional and structural roles in the body..
    D. They appear to be the molecular carriers of coded hereditary information.
    D. They appear to be the molecular carriers of coded hereditary information.
  23. In general, the lipids that we refer to as oils have ________.

    A. a high degree of unsaturated bonds
    B. a high water content
    C. long fatty acid chains
    D. a high degree of saturated bonds
    A. a high degree of unsaturated bonds
  24. The basic structural material of the body consists of ________.

    A. Proteins
    B. Nucleic acids
    C. Lipids
    D. Carbohydrates
    A. Proteins
Author
lonelygirl
ID
260828
Card Set
bone ID
Description
Mastering A&P
Updated