Quarter 2 Bio Topics

The diagram shows the general structure of an amino acid. Which type of molecule is formed from amino acids?

• lipids
• proteins
• carbohydrates
• nucleic acids

Fats, oils and cholesterol are all types of what?

• cell membranes
• hormones
  hormones
• lipids
• fatty acids

Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?

• protein
• carbohydrate
• nucleic acid
•  lipid

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements? 

• Enzymes function best at a specific temperature.
• The body needs to be warm to prevent hypothermia.
  
• The body is kept relatively warm to prevent too much enzyme action. 
• There is no connection between the two statements. 

 In living organisms, lipids function mainly as:

• Sources of stored energy and transmitters of genetic information
• Sources of stored energy and components of cellular membranes
• Transmitters of genetic information and catalysts of chemical reactions
• Catalysts of chemical reactions and components of cellular membranes

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

With what 3 letters do enzymes typically end?

• -ose
• -ase
• -ese
• -tic

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

Enzymes are...

• nucleic acids
• proteins
• lipids
• carbohydrates

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered denature
• The enzymes' amino acid sequence changes.
• The enzymes remain the same