Bio Ost

Most chemical reactions in the body rely on enzymes. Why are enzymes are necessary for many cellular reactions?

• The reactions are too slow to meet the needs of the cell if enzymes are missing

• The reactions take up too much space in the cell if enzymes are missing

• Enzymes change reactants from solid to liquid during the reactions.

• Enzymes supply the oxygen necessary for the reactions.

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?

• The body is kept relatively warm to prevent too much enzyme action.

• The body needs to be warm to prevent hypothermia.

• Enzymes function best at a specific temperature.

• There is no connection between the two statements.

Tags

NGSS.HS-LS1-3

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

• Coenzyme

• Substrate

• Vitamin

• Polypeptide

Where do substrates bind on an enzyme?

• voltage-gated channels

• surface receptor

• calcium channels

• active site

An activor or inhibitor binding place that is not the active site, causing the enzyme to change conformation (shape) is an example of ...

• competative inhibition

• allosteric control

• optimum conditions

• induced fit

What is the primary function of enzymes in biological systems?

• To speed up chemical reactions

• To provide energy for reactions

• To act as a reactant in reactions

• To change the pH of the environment

Which of the following best describes the role of enzymes in the human digestive system?

• They break down food into smaller molecules

• They absorb nutrients into the bloodstream

• They transport food through the digestive tract

• They protect the stomach lining from acid

Tags

NGSS.MS-LS1-7

Enzymes are composed of which type of biological macromolecule?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What happens to an enzyme when it is exposed to extreme heat?

• It becomes more active

• It denatures and loses function

• It becomes a substrate

• It changes into a lipid

Which of the following factors does NOT affect enzyme activity?

• Temperature

• pH

• Substrate concentration

• Color of the enzyme