Modified True/False
Indicate
whether the statement is true or false. If false, change the identified word or phrase to make
the statement true.
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1.
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On each rung of a DNA ladder, the base thymine only pairs with the
base pair adenine. _________________________
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2.
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The branch of chemistry that specializes in carbon and carbon compounds is
called ecological chemistry. _________________________
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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3.
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Which of the following is NOT a carbon compound found in living things?
a. | Carbohydrates | b. | Proteins and fats | c. | Water | d. | Nucleic acids |
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4.
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Most of the compounds that make up life contain the element:
a. | sulfur. | b. | phosphorus. | c. | carbon. | d. | oxygen. |
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5.
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The carbohydrate, ____, is used by plants to give their structure
strength.
a. | glucose | b. | sucrose | c. | cellulose | d. | starch |
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6.
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The human body is mostly made of the elements:
a. | carbon, oxygen, nitrogen, and hydrogen. | b. | oxygen, calcium,
carbon, and hydrogen. | c. | hydrogen, iron, nitrogen, and
oxygen. | d. | carbon, sodium, nitrogen, and hydrogen. |
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7.
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What do Organic Chemists study?
a. | Water | b. | Carbon compounds | c. | Optics | d. | Anatomy |
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8.
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____ are energy-rich compounds, such as starch, glucose, and sucrose.
a. | Proteins | b. | Acids | c. | Carbohydrates | d. | Water molecules |
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9.
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Which of the following is a carbohydrate?
a. | Glucose | b. | DNA | c. | Cholesterol | d. | Digestive acids |
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10.
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The reaction that breaks down glucose and releases its stored energy is
called:
a. | photosynthesis. | b. | cellular respiration. | c. | organic
chemistry. | d. | neutralization. |
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11.
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____ produces the energy that supports the food chain on Earth.
a. | Cellular respiration | b. | DNA | c. | Photosynthesis | d. | Carbon |
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12.
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Water is essential to life because:
a. | it is a good solvent. | b. | it is liquid over a wide range of
temperatures. | c. | it has a high specific heat. | d. | All of the
above |
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13.
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Cells convert the energy from glucose into:
a. | DNA molecules. | b. | ATP molecules. | c. | Phosphorus
molecules. | d. | RNA molecules. |
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14.
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Foods such as ____ contain starch.
a. | eggs and meat | b. | peanut butter, nuts and
beans | c. | rice, potatoes and bread | d. | milk, cheese and
yogurt |
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15.
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Carbon’s importance is life is due to its:
a. | four valence electrons. | b. | ability to form straight chains, branching
chains, and rings. | c. | ability to bond with as many as four other
elements. | d. | All of the above |
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16.
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Which of the following compounds is NOT organic?
a. | DNA | b. | carbohydrate | c. | sulfuric
acid | d. | corn oil |
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17.
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Which of the following is NOT a main element that carbohydrates are made
of?
a. | Carbon | b. | Nitrogen | c. | Oxygen | d. | Hydrogen |
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18.
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Which process adds oxygen to Earth’s atmosphere?
a. | Cellular respiration | b. | Photosynthesis | c. | Protein
synthesis | d. | None of the above |
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19.
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Which process adds carbon dioxide to Earth’s atmosphere?
a. | Cellular respiration | b. | Photosynthesis | c. | Protein
synthesis | d. | None of the above |
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20.
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At the end of DNA replication, each strand of the original DNA molecule:
a. | has been altered. | b. | remains intact. | c. | has been
tripled. | d. | None of the above |
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Completion
Complete each
statement.
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Select the correct term to complete each sentence. There are extra terms in
the list.| 4 bases | 3 bases | mutation | | cytosine | guanine | fats | | carbohydrates | proteins | nucleic acid | | amino
acid | protein synthesis | photosynthesis | | folded circle | double helix | catalyst | | | | | | | |
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21.
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_________________________ produces the chemical energy that supports the food
chain on Earth.
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22.
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The organic molecule produced by photosynthesis is ____________________.
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23.
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Sugars and starches are both types of _________________________.
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Short Answer
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24.
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What are the 3 most common elements found in the human body?
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Essay
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25.
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List the 4 main types of biological molecules and their functions in living
things.
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26.
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Name the three types of carbohydrate molecules and describe the
differences between them.
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