Macromolecules

Which subatomic particles are found in the nucleus of an atom?

• Protons and electrons

• Protons and neutrons

• Electrons and neutrons

• Protons, neutrons, and electrons

What does electronegativity describe?

• The tendency of an atom to lose electrons

• The tendency of an atom to gain protons

• The tendency of an atom to attract electrons from other atoms

• The ability of an atom to form metallic bonds

Which type of intramolecular bond involves an unequal sharing of electrons and has an electronegativity difference between 0.4 and 1.8?

• Non-polar covalent bond

• Polar covalent bond

• Ionic bond

• Hydrogen bond

Why is carbon considered an essential atom in organic compounds?

• It has a very high electronegativity

• It can form up to four covalent bonds with other atoms

• It is the most abundant element in the universe

• It is always found in ring structures

What is a characteristic property of carboxyl functional groups?

• They are nonpolar.

• They ionize to release H+ ions, making solutions acidic.

• They are composed of a carbon atom bonded to three hydrogen atoms.

• They accept H+ ions to form NH3+.

What happens during dehydration synthesis?

• Polymers break down into monomers by adding water.

• Monomers combine to form polymers by removing water.

• Hydrogen atoms are added to a molecule.

• Hydroxyl groups are removed from a molecule, but no water is formed.

Are you enjoying the video lesson?

• Yes

• No

What is the typical carbon to hydrogen to oxygen atom ratio in simple sugars (monosaccharides)?

• 1:1:1

• 1:2:1

• 2:1:2

• 1:2:2

Which of the following best describes lipids?

• They are large, polar, and form polymers.

• They are small, hydrophilic, and form polymers.

• They are large, nonpolar, and do not typically form polymers.

• They are small, nonpolar, and form polymers.

What characteristic distinguishes unsaturated fats from saturated fats at room temperature?

• They are solid.

• They are gaseous.

• They are liquid.

• They are crystalline.