Preparation - Tasks For Assessment - Class 9
14 Questions
Questions and Answers
- 1.Enzymes are belong to which group of organic molecules?
- A.
Carbohydrates
- B.
Lipids
- C.
Nucleic Acids
- D.
Proteins
- 2.
![The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH? - ProProfs]( "The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH?")
The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH?- A.
Temperature of 27oC and pH of 4.
- B.
Temperature of 37oC and pH of 6.
- C.
Temperature of 40oC and pH of 8.
- D.
Temperature of 50oC and pH of 10.
- 3.What affect does extremely high pH have on enzymes?
- A.
Denatures them
- B.
Kills them
- C.
Destroys them
- 4.What type of enzymes break down carbohydrates?
- A.
Protease
- B.
Lipase
- C.
Carbohydrase
- 5.Please select the active site in the given image.
- 6.Write 2 differences between animal and plant cell.
- 7.Write 3 differences between prokaryotic and eukaryotic cell
- 8.Which of the following emulsifies fats so they can be further digested by the enzyme lipase?
- A.
Hydrochloric acid
- B.
Mucus
- C.
Bile
- D.
Saliva
- 9.Protease enzymes break down proteins into what?
- A.
Fatty acids
- B.
Amino acids
- C.
Carboxylic acids
- D.
Hydrochloric acid
- 10.Which enzyme converts starch into sugars in the mouth and small intestine?
- A.
Protease
- B.
Lipase
- C.
Isomerase
- D.
Amylase
- 11.Which enzyme converts fats into 3 fatty acids and glycerol?
- A.
Amylase
- B.
Protease
- C.
Lipase
- D.
DNA polymerase
- 12.Protease enzymes are located in which organ?
- A.
Mouth
- B.
Oesophagus
- C.
Stomach
- D.
Colon
- 13.Which of the following does not affect the initial rate of an enzyme controlled reaction?
- A.
A change of pH
- B.
An increase in the duration of the reaction
- C.
A decrease in the concentration of substrate
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