Unit 6: Chemistry Review

What type of macromolecule are enzymes?

• Carbohydrates
• Proteins
• Nucleic Acids
• Lipids

Enzymes ______ the amount of energy needed for a reaction to occur.

• Increase
• Decrease

Which of the following affects an enzyme's activity?

• pH
• Temperature
• Both pH and temperature
• None of the above

The starting material that that an enzyme works on is called....

• Active site
• Product 
• Substrate
• Activation Energy

What is the optimum pH of enzyme Y?

• 1
• 4
• 9
• 14

Water is an example of a __________ molecule because it has a positive and negative side. 

• Polar
• Nonpolar
• Covalent
• Neutral

Around what atom do electrons spend more time around in a water molecule?

• Hydrogen
• Carbon
• Nitrogen
• Oxygen

Water molecules connect to each other through a bond. This bond is called....

• Polar covalent
• Neutral Bond
• Hydrogen bond
• Nitrogen bond

What is the smallest unit that can maintain ALL of life's functions?

• Atom
• Cell
• Tissue
• Organ

True or false: the electrons in a polar molecule are evenly distributed

• True
• False