General Biology Test #2 Molecules And Cells

46 Questions

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General Biology Test #2 Molecules And Cells

Multiple Choice: Choose the BEST answer


Questions and Answers
  • 1. 
    When subunits called monomers are bonded together, they form larger molecules called polymers. Proteins are a type of polymer. What is the monomer that makes up proteins?
    • A. 

      Amino acids

    • B. 

      Ions

    • C. 

      DNA

    • D. 

      Nucleotides

  • 2. 
    During photosynthesis, plants convert carbon dioxide and water to sugar and oxygen. In this reaction, sugar and oxygen are the;
    • A. 

      Enzymes

    • B. 

      Products

    • C. 

      Directions

    • D. 

      Reactants

  • 3. 
    • A. 

      The number of protons in the nuclei of their atoms

    • B. 

      The number of atoms in a sample of each element

    • C. 

      The number of electrons in the nuclei of their atoms

    • D. 

      The number of nuclei in their atoms

  • 4. 
    How is an ionic bond formed between two atoms?
    • A. 

      A pair of electrons is shared between two atoms.

    • B. 

      The outer energy levels of the atoms are filled.

    • C. 

      An electrical force forms between pairs of electrons.

    • D. 

      An electrical force forms between oppositely charged ions.

  • 5. 
    What term describes the sugar in a glass of lemonade?
    • A. 

      Solvent

    • B. 

      Solution

    • C. 

      Solute

    • D. 

      Protein

  • 6. 
    What elements make up a carbohydrate?
    • A. 

      Carbon, nitrogen, and hydrogen

    • B. 

      Carbon, hydrogen, and oxygen

    • C. 

      Starches and sugars

    • D. 

      Carbon, hydrogen, nitrogen, and oxygen

  • 7. 
    • A. 

      Saturated fatty acids contain at least one carbon-carbon double bond.

    • B. 

      Saturated fatty acids are found only in oils.

    • C. 

      Carbons in saturated fatty acids are bonded together only with covalent bonds.

    • D. 

      Saturated fatty acids contain only carbon-carbon single bonds.

  • 8. 
    What term describes the amount of energy that must be absorbed before a chemical reaction can start?
    • A. 

      Bond energy

    • B. 

      Activation energy

    • C. 

      Endothermic energy

    • D. 

      Exothermic energy

  • 9. 
    What are the parts that make up the lock-and-key model of enzyme function?
    • A. 

      Enzyme and products

    • B. 

      Enzyme and catalyst

    • C. 

      Enzyme and substrates

    • D. 

      Enzyme and active site

  • 10. 
    • A. 

      It raises the activation energy of the reaction.

    • B. 

      It lowers the activation energy of the reaction.

    • C. 

      It has no effect on the activation energy of the reaction.

    • D. 

      First it lowers the activation energy to start the reaction, then it raises the activation energy to keep the reaction under control.

  • 11. 
    What term describes the reactants that an enzyme acts on?
    • A. 

      Substrate

    • B. 

      Lock-and-key

    • C. 

      Product

    • D. 

      Active site

  • 12. 
    Which conditions are likely to affect the shape of an enzyme?
    • A. 

      Concentration of substrate

    • B. 

      Temperature

    • C. 

      PH

    • D. 

      Both temperature and pH

  • 13. 
    Acidic solutions have a pH that is
    • A. 

      Less than 7

    • B. 

      Between 7 and 14

    • C. 

      A negative number

    • D. 

      More than 7

  • 14. 
    All organic compounds contain the element
    • A. 

      Carbon

    • B. 

      Nitrogen

    • C. 

      Calcium

    • D. 

      Sodium

  • 15. 
    The molecule below is a 
    • A. 

      Lipid

    • B. 

      Carbohydrate

    • C. 

      Protein

    • D. 

      Nucleic acid

  • 16. 
    The following molecules are mirror images of each other.  What is the term for this?
    • A. 

      Structural Isomers

    • B. 

      Stereoisomers

    • C. 

      Equivalents

    • D. 

      Nonequivalents

  • 17. 
    What is the correct term for the energy releasing graph below?
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Kinetic

    • D. 

      Passive

  • 18. 
    What is the correct term for the energy gaining graph below?
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Kinetic

    • D. 

      Passive

  • 19. 
    The graph below shows a catalyzed reaction vs. an uncatalyzed reaction.  Which of the following statements is true about the graph?
    • A. 

      The Catalyst lowers the energy needed for the reaction to proceed.

    • B. 

      The Catalyst raises the energy needed for the reaction to proceed.

    • C. 

      The Catalyst does not affect the reaction.

    • D. 

      The reaction will not work without the catalyst

  • 20. 
    Which term describes the tendency of a water molecule to stick to another water molecule?
    • A. 

      Cohesion

    • B. 

      Adhesion

    • C. 

      Density

    • D. 

      Bouyancy

  • 21. 
    Which term describes the tendency of a water molecule to stick to different types molecules?
    • A. 

      Cohesion

    • B. 

      Adhesion

    • C. 

      Density

    • D. 

      Bouyancy

  • 22. 
    The diagram below shows a water molecule.  What do the charges on either end of the molecule indicate about the molecule?
    • A. 

      Water is a polar molecule.

    • B. 

      Water is a nonpolar molecule.

    • C. 

      Water is an ionic compound.

    • D. 

      Water is an ion.

  • 23. 
    What structure is found in plant cells but not in animal cells?
    • A. 

      Nucleus

    • B. 

      Vesicle

    • C. 

      Vacuole

    • D. 

      Cell wall

  • 24. 
    What materials makes up a cell membrane?
    • A. 

      Phospholipids and proteins

    • B. 

      Cholesterol and nucleic acids

    • C. 

      Proteins, nucleic acids, and cholesterol

    • D. 

      Phospholipids, cholesterol, and proteins

  • 25. 
    What type of receptor is within a cell?
    • A. 

      Membrane receptor

    • B. 

      Intercellular receptor

    • C. 

      Intracellular receptor

    • D. 

      Ligand receptor

  • 26. 
    What type of membrane allows some, but not all, materials to cross?
    • A. 

      Diffusible

    • B. 

      Permeable

    • C. 

      Impermeable

    • D. 

      Selectively permeable

  • 27. 
    Which part(s) of a phospholipid is hydrophobic?
    • A. 

      Phosphate group and glycerol head

    • B. 

      Fatty acid tails

    • C. 

      Phosphate groups only

    • D. 

      The entire phospholipid molecule

  • 28. 
    What term describes the diffusion of water through a semipermeable membrane down a concentration gradient?
    • A. 

      Osmotic pressure

    • B. 

      Osmosis

    • C. 

      Hydro-diffusion

    • D. 

      Fluid diffusion

  • 29. 
    In which kind of solution would water move from the solution into the cell?
    • A. 

      Hypotonic

    • B. 

      Hypertonic

    • C. 

      Isotonic

    • D. 

      Hydrotonic

  • 30. 
    • A. 

      Add more solutes

    • B. 

      Add more solutes and water

    • C. 

      Add more water

    • D. 

      Boil off some water

  • 31. 
    What term describes the movement of molecules that are pumped from an area of low concentration to an area of high concentration?
    • A. 

      Passive transport

    • B. 

      Active transport

    • C. 

      Energy transport

    • D. 

      Diffusion

  • 32. 
    Living cells are continuously making a variety of proteins. This process occurs on what organelle?
    • A. 

      Vacuole

    • B. 

      Ribosome

    • C. 

      Vesicle

    • D. 

      Rough ER

  • 33. 
    Certain types of small molecules cross the plasma membrane without the cell exerting any energy. This type of movement is an example of
    • A. 

      Passive transport

    • B. 

      Transport proteins

    • C. 

      Kinetic transport

    • D. 

      Active transport

  • 34. 
    The energy needed to drive molecules across the cell membrane against a concentration gradient typically comes from
    • A. 

      Proteins

    • B. 

      ATP

    • C. 

      Amino acids

    • D. 

      NaCl

  • 35. 
    The process taking place below is called
    • A. 

      Endocytosis

    • B. 

      Pinocytosis

    • C. 

      Phagocytosis

    • D. 

      Exocytosis

  • 36. 
    The process taking place below is called
    • A. 

      Endocytosis

    • B. 

      Exocytosis

    • C. 

      Active transport

    • D. 

      Passive transport

  • 37. 
    The diagram below shows a plant cell.  This can easily determined because of the presence of:
    • A. 

      A cell wall

    • B. 

      A large vacuole

    • C. 

      Chloroplasts

    • D. 

      All of the above

  • 38. 
    The diagram below shows a prokaryotic cell.  This can easily determined because:
    • A. 

      The cell lacks DNA

    • B. 

      The cell lacks a nucleus and other membrane bound organelles

    • C. 

      The cell has a flagellum

    • D. 

      None of the above

  • 39. 
    In a laboratory a student found a cell under high power of the microscope.  In order to calculate the correct power of magnification she would:
    • A. 

      Add the power of the eyepiece with the power of the objective

    • B. 

      Multiply the power of the eyepiece with the power of the objective

    • C. 

      Add the power of the iris with the power of the condenser

    • D. 

      Multiply the power of the iris to the power of the condenser

  • 40. 
    What is the ability of organisms and cells to maintain a stable internal environment called?
    • A. 

      Protein synthesis

    • B. 

      Digestion

    • C. 

      Photosynthesis

    • D. 

      Homeostasis

  • 41. 
    The structure in plant cells that carries out photosynthesis is called
    • A. 

      Cell membrane

    • B. 

      Chloroplast

    • C. 

      Ribosome

    • D. 

      Nucleus

  • 42. 
    Diffusion is an example of 
    • A. 

      Passive transport

    • B. 

      Active transport

    • C. 

      Membrane receptors

    • D. 

      Transport proteins

  • 43. 
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      At equilibrium

    • D. 

      Ionic

  • 44. 
    Respiration is a type of chemical reaction that releases a lot of energy.  This type of reaction is called
    • A. 

      Exothermic

    • B. 

      Endothermic

    • C. 

      At equilibrium

    • D. 

      Ionic

  • 45. 
    In a laboratory a student collected data that showed a dialysis bag had doubled in weight when it was placed in a beaker of distilled water.  When compared to the cell the solution in the beaker is termed
    • A. 

      Hypertonic

    • B. 

      Hypotonic

    • C. 

      Isotonic

    • D. 

      None of the above

  • 46. 
    Cells must be small in size (surface area to volume ratio is similar)  in order to function because if a cell gets to large 
    • A. 

      Diffusion cannot take place

    • B. 

      The cell would decay

    • C. 

      The cell would explode

    • D. 

      None of the above