Unit 3: BioChemistry

Where do the atoms come from that form new molecules?

• New molecules can never be formed.

• Atoms come from existing molecules to form new ones.

• Atoms are created from the air whenever they are needed.

• Molecules are made up of cells, not atoms.

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What makes up a molecule?

• Molecules are the smallest unit and make up atoms.

• Elements, that form atoms.

• Molecules are made up of individual cells.

• Atoms, that form elements.

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If the reactants of a chemical reaction are Carbon Dioxide and Water, what is true of the products of the reaction?

• The products must contain carbon, hydrogen, and oxygen.

• The products will contain only carbon since hydrogen and oxygen will be destroyed.

• The products will not contain any of the original atoms.

• The only product left would be water.

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If a chemical reaction has 6 nitrogen as part of its inputs, what is true about the amount of nitrogen that would be present in the outputs?

• Since a new molecule would be formed, nitrogen will turn into something new, so 0 would be left.

• There would be 12 nitrogen present in the outputs due to 2 outputs being formed.

• Since a chemical reaction breaks down molecules, only 3 nitrogen atoms would be left due to some being destroyed.

• There will 6 nitrogen atoms present in the outputs.

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Which of the following make up carbohydrates?

• Monosaccharides

• Amino acids

• Nucleotides

• Fatty acids

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Which of the following are building blocks of proteins?

• Simple sugars

• Amino acids

• Nucleotides

• Fatty acids

Which of the following makes up lipids?

• Simple sugars

• Amino acids

• Nucleotides

• Fatty acids

Which of the following are building blocks of nucleic acids?

• Simple sugars

• Amino acids

• Nucleotides

• Fatty acids

Which of the following is a function of a Carbohydrate?

• Carries genetic material

• Provides energy for cells through sugars like glucose

• Helps to form fats in our body

• Defends against invaders

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The Law of Conservation of Matter states that...

• New molecules are created by the body when needed

• Molecules are destroyed in a chemical reaction

• Matter cannot be created or destroyed; it can only change forms

• All matter must stay in its original form

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