Biology Final Exam Review 2023

Where nutrients go after the small intestine has absorbed them.

• bloodstream
• stomach
• esophagus
• kidneys

Saliva contains this enzyme to start the digestive process of carbohydrates.

• spit
• amylase
• hydrochloric acid
• sodium bicarbonate

Bile is made by which digestive organ?

• Gallbladder
• Stomach
• Rectum
• Liver

Villi are shaped the way they are so that:

• they move food through the digestive tract
• they mash up food
• they increase the surface area of the small intestine for absorption of nutrients
• they allow us to taste food

Pepsin breaks down

• carbohydrates into glucose

• proteins into amino acidis

• fats into glycerol and fatty acids

• nucleic acids

Lipase breaks down lipids into

• maltose

• glucose

• glycerol and fatty acids

• amino acids

Tags

NGSS.MS-LS1-7

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy
• increasing the temperature of the cell
• increasing the concentration of reactants 

Tags

NGSS.MS-PS1-2

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 .
  

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.
• Enzymes decrease the energy level of the products.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

Tags

NGSS.HS-PS1-2

As the temperature increases, enzyme's rate of reaction increases why?

• increased no. of enzymes
• substrates are active
• higher kinetic energy so higher collisions
• enzymes are occupied