Le Lesson 1.7 Hw

7 Questions

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Le Lesson 1.7 Hw

These questions deal with macromolecules, scientific method, cellular respiration, and photosynthesis. YOU MUST SCORE AT LEAST 70. REMEMBER: PERIOD# followed by FIRST & LAST NAME


Questions and Answers
  • 1. 
    Researchers performing a well-designed experiment should base their conclusions on 
    • A. 

      The hypothesis of the experiment

    • B. 

      Data from repeated trials of the experiment

    • C. 

      A small sample size to insure a reliable outcome of the experiment

    • D. 

      Results predicted before performing the experiment

  • 2. 
    In plants, simple sugars are least likely to be
    • A. 

      Linked together to form proteins

    • B. 

      Broken down into carbon dioxide and water

    • C. 

      Used as a source of energy

    • D. 

      Stored in the form of carbohydrate molecules

  • 3. 
    The flow of energy through an ecosystem involves many energy transfers. The diagram below summarizes the transfer of energy that eventually powers muscle activity. The process of cellular respiration is represented by
    • A. 

      Arrow A, only

    • B. 

      Arrow B, only

    • C. 

      Arrow C, only

    • D. 

      Arrows A, B, and C

  • 4. 
    The graphs below show the changes in the rela- tive concentrations of two gases in the air surrounding a group of mice.       Which process in the mice most likely accounts for the changes shown?
    • A. 

      Active transport

    • B. 

      Evaporation

    • C. 

      Respiration

    • D. 

      Photosynthesis

  • 5. 
    The production of energy-rich ATP molecules is the direct result of
    • A. 

      Recycling light energy to be used in the process of photosynthesis

    • B. 

      Releasing the stored energy of organic compounds by the process of respiration

    • C. 

      Breaking down starch by the process of digestion

    • D. 

      copying coded information during the process of protein synthesis

  • 6. 
    The diagram below represents events associated with a biochemical process that occurs in some organisms.  Which statement concerning this process is correct?
    • A. 

      The process represented is respiration and the primary source of energy for the process is the Sun.

    • B. 

      The process represented is photosynthesis and the primary source of energy for the process is the Sun.

    • C. 

      This process converts energy in organic compounds into solar energy which is released into the atmosphere.

    • D. 

      This process uses solar energy to convert oxygen into carbon dioxide.

  • 7. 
    Carbon dioxide makes up less than 1 percent of Earth’s atmosphere, and oxygen makes up about 20 percent. These percentages are maintained most directly by
    • A. 

      Respiration and photosynthesis

    • B. 

      The ozone shield

    • C. 

      Synthesis and digestion

    • D. 

      Energy recycling in ecosystems