Final Exam Questions Set 2

What is a chemical reaction?

• A process that changes one set of compounds into another

• A process that changes the state of matter

• A process that creates new elements

• A process that only occurs in living organisms

What are the elements or compounds that enter into a chemical reaction called?

• Catalysts

• Reactants

• Products

• Substrates

What is the role of enzymes in chemical reactions?

• They have no effect on the chemical reaction

• They change the reactants into different products

• They slow down the reaction by increasing the activation energy

• They speed up the reaction by lowering the activation energy

What is the function of nucleic acids in living organisms?

• Transport substances into or out of cells

• Form important cellular structures

• Control the rate of reactions

• Store and transmit genetic information

What is the primary structure of a protein?

• The sequence of the amino acids

• The folding or coiling of the polypeptide chain

• The complete three-dimensional arrangement of the polypeptide chain

• The way the polypeptides are arranged in relation to each other

What is the main function of carbohydrates in living organisms?

• Store and release energy

• Control the rate of reactions

• Form important cellular structures

• Transport substances into or out of cells

What is the pH of a basic solution?

• Exactly 0

• Above 7

• Exactly 7

• Below 7

What is the function of buffers in living things?

• Form important cellular structures

• Store and release energy

• Control the rate of reactions

• Prevent sharp, sudden changes in pH

What is the main role of lipids in living organisms?

• Transport substances into or out of cells

• Control the rate of reactions

• Fight disease

• Store energy and form important parts of biological membranes

What is the main function of proteins in living organisms?

• Store and release energy

• Form important cellular structures

• Control the rate of reactions and regulate cell processes

• Transport substances into or out of cells