Macromolecules

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

Which of the following makes up a molecule of water?

• one atom of oxygen, two atoms of hydrogen

• one atom of hydrogen, two atoms of oxygen

• one atom of chlorine, one atom of sodium

• one atom of hydrogen, one atom of oxygen

A monosaccharide is....

• carbohydrate

• lipids

• protein

• nucleic acid

This macromolecule provides the major energy source used by mitochondria (and all living things)

• carbohydrate

• lipids

• protein

• nucleic acid

This macromolecule make up cell membranes, store energy, and provide insulation

• carbohydrate

• lipids

• protein

• nucleic acid

This macromolecule carries hereditary information and instructions for building molecules

• carbohydrate

• lipids

• protein

• nucleic acid

This macromolecule provides structural support and act as enzymes to catalyze metabolic reactions

• carbohydrate

• lipids

• protein

• nucleic acid

A macromolecule with C, H, O, and N only, is a.....

• carbohydrate

• lipid

• protein

• nucleic acid