Ch. 6: Chemistry of Biology

Carbohydrates are made up of three of the six major molecules found in living things. The general chemical formula for a carbohydrate is CH₂O. Which elements combine to make a carbohydrate?

• Copper and cobalt

• Carbon, helium, and oxygen

• Chlorine and oxygen

• Carbon, hydrogen, and oxygen

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When people eat foods high in proteins, such as meat, eggs and cheese, the body breaks down the proteins into smaller molecules. What is supplied to cells when the body breaks down proteins?

• amino acids

• phospholipids

• nucleic acids

• carbohydrates

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What are the four main types of molecules found in the cells of living things?

• carbohydrates, lipids, nucleic acids, and proteins

• carbon dioxide, hydrogen, oxygen, and various salts

• lipids, nutrients, nucleic acids, and carbon dioxide

• atoms, molecules, chemical compounds, and carbohydrates

Animal cells have four main molecules that keep the body healthy. What type of molecule in animal cells provides a “map” for making proteins?

• Lipids

• Proteins

• Nucleic acids

• Carbohydrates

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Nucleic Acids are made up of smaller subunits called....

• Nucleotides

• Monosaccharides

• Lipids

• Subunits

Enzymes make chemical reactions go faster by doing what?

• Lowering the activation energy of a reaction

• Absorbing energy

• Making energy

• Having a dance off with other enzymes

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Where an enzyme joins with a substrate is called its...

• Active Site

• Substrate

• Mouth

• pH

Substances that dissociate in water and release hydrogen ions (H+)

• Acids

• Bases

• Ions

• Compounds

_{Which of the following is NOT true of atoms?}

• They are composed of molecules.

• They can combine with other atoms.

• They make up elements

• They are extremely small

_{A negatively charged particle moving around the nucleus of an atom}

• neutron

• proton

• electron

• ion

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