Biology Review for FAST 2

Which of these statements should you include in an explanation of the relationship among carbon, amino acids and proteins?

• Amino acids are polymers made up of proteins.

• Proteins are polymers made up of amino acids.

• Proteins are polymers made up of amino acids.

• Amino acids are monomers made up mostly of carbon, hydrogen, oxygen, nitrogen and phosphorus.

Suppose you are going to draw models of the four main biomolecules, which statement describes how the models will be similar?

• They will all include a sugar, phosphate group and a base.

• They will all have hydrocarbon chains connected only by double bonds.

• They will all be formed around carbon chains and rings.

• They will all include a chain of amino acids.

Which is not an organic molecule found in organisms?

• Water

• Protein

• Carbohydrate

• Nucleic acid

Which statement is true about the main biomolecules?

• DNA is a single stranded molecule.

• Carbohydrate is the source of quick energy.

• Phospholipids are structural components of cell wall.

• Carbohydrate like cellulose is a structure found in cell membrane.

Water has an uneven distribution of charges. The hydrogen has a positive charge and oxygen has a negative charge. This property of water is known as _____.

• capilliary action

• polarity

• cohesion

• adhesion

Water molecules are able to stick to things other than water. This property of water is known as _____.

• surface tension

• cohesion

• adhesion

• capilliary action

Why does ice float on liquid water?

• Water is less dense in its frozen form.

• Water is more dense in its frozen form.

• Water has a high specific heat.

• Water is the universal solvent.

What characteristic of water causes it to form a thicker drop on a counter versus alcohol, which forms a flatter drop?

• Capillary action

• Polarity

• Cohesion

• Adhesion

What property of water allows certain animals, like this water strider, to walk on the surface of water?

• Capillary action

• Adhesion

• High specific heat

• Surface tension

Fluoride is added to drinking water supplies in many states. People cannot see fluoride in the water because it _____.

• turns into water

• settles to the bottom of a container

• dissolves to form a colorless solution

• is less dense than water so it floats