Chemistry of Life Test Review 2019

Which of the following are the most common essential elements life?

• Carbon, Hydrogen, Oxygen
• Carbon, Nitrogen, Lithium
• Nitrogen, Fluorine, Bromine
• Hydrogen, Copper, Oxygen

Complex macromolecules are composed of repeating subunits called

• DNA
• ATP
• Monomers
• Carbohydrates

How is an organic compound different from an inorganic compound?

• Inorganic compounds contain oxygen atoms and hydrogen atoms.
• Photosynthesis is responsible for organic compounds.
• Organic compounds contain carbon atoms bonded to other atoms.
• Organic compounds come only from nonliving things.

Which statement best explains why a carbon atom can bond with itself easily?

• It forms hydrogen bonds.
• It is an organic element.
• It has four valence electrons.
• It is an ion.

Which type of molecule is vegetable oil?

• Carbohydrate

• Protein

• Nucleic Acid

• Lipid

In living systems, what is needed for chemical reactions to occur?

• Water
• Oxygen
• Enzymes
• Protein

Scientists are studying compounds in a newly discovered rainforest plant. The plant produces an unusual substance that local people from the area say acts as an anesthetic.  One scientist tested the substance with the chemical indicator Sudan III. If the test is negative, which type of macromolecule is not present in the substance?

• Lipid
• Nucleic Acid
• Carbohydrate
• Protein

Which of the following is NOT true of a chemical reaction?

• They can create products more complex than the reactants.

• They can break down reactants into simipler products.

• They give off energy as heat.

• They can change one element into another element.

What is the basic unit of all living things?

• Atoms

• Molecules

• Cells

• Organelles

Which of the following is a molecule of glucose?

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•