Bio - Chapter 5 (Form 4)

The diagram shows the mechanism of an enzyme.

What is X?

• Enzyme

• Product

• Substrate

• Enzyme-substrate complex

The diagram shows the action of an enzyme on a substrate.

Which of the following is represented by P?

• Product

• Substrate

• Enzyme-substrate complex

• Stable intermediate substance

Diagram shows a molecule of an enzyme.

Which of the followings show the substrate for this enzyme?

• 
• 
• 
• 

A housewife accidentally cut her finger and her blood stained her shirt.

Her husband bought a box of washing powder with enzyme.

Which of the followings is the most suitable enzyme and water temperature to remove the blood stain?

• Lipase, 37^oC water

• Protease, 37^oC water

• Amylase, 37^oC water

• Protease, 18^oC water

Tags

NGSS.HS-PS1-5

Diagram shows the effect of substrate concentration on the rate of enzyme reaction.

What causes the rate of reaction at point X to Y?

• Free active sites

• Maximum rate of reaction

• Limited enzyme concentration

• Decrease in pH of the substrate

A daughter need to prepare a meat dish in less than an hour after come back from work.

Which of the followings is the best step to treat the meat before cooking?

• Marinate with lipase

• Marinate with rennin

• Marinate with protease

• Marinate with amylase

Diagram below shows an enzyme reaction.

Which of the followings represent X, Y and Z?

• X:enzyme, Y:product, Z:substrate

• X:product, Y:enzyme, Z:substrate

• X:substrate, Y:enzyme, Z:product

• X:substrate, Y:product, Z:enzyme

The equation shows the hydrolysis of sucrose.

What is represented by P, Q and R?

• P:sucrase, Q:glucose, R:glucose

• P:amylase, Q:maltose, R:glucose

• P:sucrase, Q:fructose, R:glucose

• P:sucrase, Q:galactose, R:glucose

Diagram shows the experiment to study the effect of pH on the reaction of an enzyme.

Which test tubes remain cloudy after 60 minutes?

• P and Q

• R and S

• Q and S

• P and R

Diagram shows a petri dish with agar jelly containing starch.

Four holes were cut in the jelly and each hole was treated differently.

After 30 minutes, iodine solution was poured over the jelly.

Which holes, A, B, C or D would be surrounded by the largest yellowish brown region?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2