IB Biology 2.1 - 2.3

What is the maximum number of bonds a carbon atom can form with another atoms?

• 3

• 2

• 4

• 6

Which chemical group do amino acids contain that carbs and lipids do not?

• hydroxyl

• amine

• carboxyl

• methyl

Which term describes the synthesis of complex molecules fromsimpler molecules?

• adhesion

• catabolism

• metabolism

• anabolism

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Which can be explained by the solvent properties of water?

• Sodium chloride is transported as Na⁺ and Cl^– in blood.

• Movement of water occurs under tension in the xylem.

• Water is the coolant in sweat.

• Ice floats on liquid water.

Which substance must be transported in the blood by lipoprotein complexes?

• Cholesterol

• Oxygen

• Sodium chloride

• Amino acids

At room temperature, water is a liquid and methane is a gas. Which molecular property explains this difference?

• Higher molecular mass of water

• Dipolarity of water

• Presence of more hydrogen in methane

• Higher boiling point than methan

A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages. Which molecule fits this description?

• Glycogen

• Cellulose

• Amylose

• Amylopectic

Which type of reaction is the breakdown of starch into sugars?

• Denaturation

• Reducation

• Catabolic

• Condensation

Which molecule is a polysaccharide?

• Glucagon

• Glucose

• Glycerol

• Glycogen

What property of water makes it suitable as a coolant?

• It takes a lot of energy to increase the temperature of water.

• It takes a lot of energy for water to evaporate.

• Water molecules are cohesive and stick to the skin.

• Water is a good solvent so it can transport heat from the body.

Tags

NGSS.HS-ESS2-5