Biology S1: Mid-Unit 2 - Part 1

Which statement is true of all organic compounds?

• All contain carbon

• All contain nitrogen

• All are hydrophobic

• All are classified as carbohydrates

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

• Ionic bond

• Covalent bond

• Nuclear bond

• Organic bond

Tags

NGSS.HS-PS1-1

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

• • They will bind to other molecules.

• • They will turn into carbon molecules.

• • They will remain unchanged.

• • They will break down.

How is an organic compound different from an inorganic compound?

• • Organic compounds come only from nonliving things.

• • Photosynthesis is responsible for organic compounds.

• • Organic compounds contain carbon atoms bonded to other atoms.

• • Inorganic compounds contain oxygen atoms and hydrogen atoms.

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

• It is an organic element.

• It is an ion.

• It forms hydrogen bonds.

• It has four valence electrons.

How are hydrogen bonds different from covalent bonds?

• • The resulting compounds contain carbon.

• • 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.

• • They have valence electrons.

• • They are organic.

Which type of molecule is fat?

• Carbohydrate

• Lipid

• Protein

• Nucleic Acid

Which statement best explains why electrical signals in the body are often based on ions?

• Ions contain a single atom.

• Ions can gain electrons.

• Ionic bonds are very strong.

• Ions are charged particles.

Why is carbon present in so many types of molecules?

• It is abundant on earth.

• It can form up to four covalent bonds.

• It has valence electrons.

• It can become an ion.

Tags

NGSS.HS-LS1-6

The dots in each diagram represent valence electrons orbiting the nucleus of an atom.

Which diagram shows the valence electron pattern for a carbon atom?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1