Unit 2 Review

All living things are made up of four major macromolecules. They are:

• Carbohydrates, Lipids, Proteins and Nucleic Acids

• Monosaccharides, fatty acids, amino acids and nucleotides

• Enzymes, Hormones, Channel Proteins and Carrier Proteins

• Hydrogen, Oxygen, Carbon and Nitrogen

Macromolecules are _________, long molecules consisting of many similar building blocks. These building block molecules are called ________.

• monomers, polymers

• polymers, monomers

• compounds, elements

• elements, compounds

A ___________ reaction occurs when two monomers bond together through the loss of a water molecule. This can be called "building bonds and losing water."

• Hydrolysis

• Osmosis

• Passive

• Dehydration

Polymers are disassembled into monomers by _________, a reaction that is essentially the reverse of dehydration. It can be called "breaking bonds with water."

• Hydrolysis

• Osmosis

• Passive

• Dehydration

Fill in the blank in the following dehydration reaction:

Monosaccharide + monosaccharide -> _________+ water

• monosaccharide

• disaccharide

• galactose

• glucose

Fill in the blank in the following hydrolysis reaction:

Maltose + water ---> _______ + glucose

• galactose

• glucose

• maltose

• fructose

Fill in the blank in the following hydrolysis reaction:

Sucrose + water ---> _______ + glucose

• galactose

• glucose

• maltose

• fructose

Which of the following is a storage polysaccharide of plants, consisting of many glucose monomers?

• Glycogen

• Cellulose

• Starch

• Dietary fiber

Which of the following is a storage polysaccharide of animals, consisting of many glucose monomers?

• Glycogen

• Starch

• Cellulose

• Dietary fiber

Lipids are hydrophobic. Hydrophobic molecules are nonpolar while water is considered polar. True or False?

• True

• False