Final Exam

Match the following

• lipid

• 
• protein

• 
• carbohydrate

• 
• nucleic acid

• 

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112.42.c.5.A

Carbs and lipids are similar because they...

• Are a source of energy for living organisms

• Help with immune response

• build structures such as cellulose and chitin

• Contain the same elements (CHO)

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112.42.c.5.A

Beeswax is a waxy substance that is produced by bees and then harvested by humans for a variety of uses. Ancient Romans used beeswax as a waterproofing agent because it is not water-permeable. Beeswax is which of the following types of organic molecule?

• carbohydrate

• lipid

• nucleic acid

• protein

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112.42.c.5.A

An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?

• Carbohydrates and lipids

• Proteins and carbohydrates

• Nucleic acids and carbohydrates

• Lipids and nucleic acids

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112.42.c.5.A

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.

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112.42.c.11.B

What will most likely happen if an appropriate enzyme is added to a chemical reaction?

• The reaction rate will increase.

• The equilibrium of the reaction will be maintained.

• The reaction rate will decrease.

• The reaction will stop.

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112.42.c.11.B

In living cells, enzymes act as catalysts, which may reduce the amount of activation energy required for a chemical reaction to occur. In the graphs below, pathway x is a solid line representing the uncatalyzed reaction. The dotted line shows the catalyzed reaction. Which graph best illustrates the changes in a reaction when the catalyst reduces the amount of energy required?

• 
• 
• 
• 

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112.42.c.11.B

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

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112.42.c.11.B

___________ allow cells to recognize each other and act like ID tags. 

• Cell Surface Markers

• Receptor Proteins

• Enzymes

• Transport Proteins

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112.42.c.5.C

What type of transport is occurring in part A of the diagram?

• Facilitated Diffusion
• Osmosis
• Active Transport
• Diffusion

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112.42.c.5.C