2.11 Mid Unit Test The Chemistry Of Life

Question: Which statement is true of all organic compounds?

Answer: All contain carbon (CORRECT)

Question: Which type of bond holds atoms together in a water molecule?

Answer: Covalent bond (CORRECT)

Question: According to the concept of entropy, what will likely happen to most molecules over time?

Answer: They will break down (CORRECT)

Question: How is an organic compound different from an inorganic compound?

Answer: Organic compounds contain carbon atoms bonded to other atoms (CORRECT)

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

Answer: It has four valence electrons (CORRECT)

Question: How are hydrogen bonds different from covalent bonds?

Answer: Hydrogen bonds are weaker bonds that form from molecules that have a slight positive charge on one side and a slight negative charge on the other (CORRECT)

Question: Which type of molecule is fat?

Answer: Lipid (CORRECT)

Question: Which statement best explains why electrical signlas in the body are often based on ions?

Answer: Ions are charged particles (CORRECT)

Question: Why is carbon present in so many types of molecules?

Answer: It can form up to four covalent bonds (CORRECT)

Question: Study the diagrams. The dots represent valence electrons orbiting the nucleus if an atom. Which diagram shows the valence electron pattern for a carbon atom?

Answer: A (or the one with four small circles on a ring around a ball in the middle) (CORRECT)