Le Lesson 1.7 Hw

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| By Ionca
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Ionca
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Quizzes Created: 33 | Total Attempts: 36,738
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  • 1/7 Questions

    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

    • Respiration and photosynthesis
    • The ozone shield
    • Synthesis and digestion
    • Energy recycling in ecosystems
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Le Lesson 1.7 Hw - Quiz
About This Quiz

These questions deal with macromolecules, scientific method, cellular respiration, and photosynthesis.
YOU MUST SCORE AT LEAST 70.

REMEMBER: PERIOD# followed by FIRST & LAST NAME

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  • 2. 
    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? - ProProfs

    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?

    • Active transport

    • Evaporation

    • Respiration

    • Photosynthesis

    Correct Answer
    A. Respiration
    Explanation
    Respiration consumes (uses up) oxygen and produces (makes more) carbon dioxide.

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  • 3. 

    The production of energy-rich ATP molecules is the direct result of

    • Recycling light energy to be used in the process of photosynthesis

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

    • Breaking down starch by the process of digestion

    • copying coded information during the process of protein synthesis

    Correct Answer
    A. Releasing the stored energy of organic compounds by the process of respiration
    Explanation
    Respiration makes ATP, which is energy-rich. The answer had RESPIRATION in it and also mentioned energy.

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  • 4. 

    Researchers performing a well-designed experiment should base their conclusions on 

    • The hypothesis of the experiment

    • Data from repeated trials of the experiment

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

    • Results predicted before performing the experiment

    Correct Answer
    A. Data from repeated trials of the experiment
    Explanation
    Experiments must be performed multiple times. The hypothesis is TESTED, not concluded upon.

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  • 5. 
    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 - ProProfs

    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

    • Arrow A, only

    • Arrow B, only

    • Arrow C, only

    • Arrows A, B, and C

    Correct Answer
    A. Arrow B, only
    Explanation
    respiration is converting food (glucose) into energy in the form of ATP.

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

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

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

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

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

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

    Correct Answer
    A. The process represented is photosynthesis and the primary source of energy for the process is the Sun.
    Explanation
    PHOTOSYNTHESIS: sun and CO2 enter the plant and oxygen leaves. CHECK YOUR NOTES.

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  • 7. 

    In plants, simple sugars are least likely to be

    • Linked together to form proteins

    • Broken down into carbon dioxide and water

    • Used as a source of energy

    • Stored in the form of carbohydrate molecules

    Correct Answer
    A. Linked together to form proteins
    Explanation
    amino acids make up proteins, not sugars. check your table.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 30, 2012
    Quiz Created by
    Ionca
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