Revision Chapter 1

Hydrogen and oxygen in water are bonded by?

• non polar covalent bond

• polar covalent bond

• ionic bond

• hydrogen bond

What is the attraction between one partial negative end of a water with one partially positive end of a water is called?

• hydrogen bonds

• a covalent bond

• an ionic bond

• a van der Waals interaction

Water is 'polar' because

• Water has a slightly negative charge overall

• Water has a slightly positive charge, but only as a liquid

• Water has no evident charge, unless in sold form

• The oxygen atoms is partially negative while the hydrogen atoms is partially positive

Which is the property of water

• high viscosity

• low specific heat capacity

• high latent heat of vaporization

• non polar molecule

Carbohydrates that are made up of chains of sugar units are called

• polysaccharides

• complex carbohydrates

• monosacharides

• monosaccharides

The molecule below is

• fructose

• ß-glucose

• galactose

• α-glucose

Explain the relationship between dehydration (condensation) reactions and hydrolysis?

• Dehydration reactions assemble polymers; hydrolysis reactions break polymers apart.

• Dehydration reactions eliminate water from membranes; hydrolysis reactions add water to membranes.

• Dehydration reactions and hydrolysis reactions assemble polymers from monomers.

• Hydrolysis reactions create polymers and dehydration reactions create monomers

The chemical formula for glucose molecule

• C₁₂H₁₂O₁₂

• Ｃ₆Ｈ₁₂Ｏ₆

• C₁₂H₆O₁₂

• C₆H₆O₆

Identify the molecule in the figure below

• α-glucose

• ß-glucose

• maltose

• cellulose

Identify the molecule in the figure below

• cellulose

• ß-glucose

• fructose

• maltose