Question 1

What is the role of enzymes in biological reactions?

Accepted Answer

They act as catalysts to speed up reactions

Answer

They slow down reactions

Answer

They provide energy for reactions

Answer

They are consumed in reactions

Question 2

What factor can affect the activity of an enzyme?

Accepted Answer

Temperature

Answer

Shape

Answer

Color

Answer

Size

Question 3

Which part of the enzyme is specifically involved in binding to the substrate?

Accepted Answer

Active site

Answer

Allosteric site

Answer

Inhibitor site

Answer

Cofactor

Question 4

What is the effect of pH on enzyme activity?

Accepted Answer

It can alter the enzyme's shape

Answer

It makes enzymes inactive only at high levels

Answer

It always increases reaction speed

Answer

It has no effect

Question 5

Why do enzymes have specific optimal conditions?

Accepted Answer

Because their structure determines their function

Answer

Because they require a certain color

Answer

Because they need to be mixed with water

Answer

Because they can only work at room temperature

Question 6

What happens to an enzyme after it catalyzes a reaction?

Accepted Answer

It remains unchanged and can be used again

Answer

It loses its ability to catalyze

Answer

It gets destroyed

Answer

It changes shape permanently

Question 7

What are enzymes primarily made of?

Accepted Answer

Proteins

Answer

Carbohydrates

Answer

Lipids

Answer

Nucleic acids

Question 8

What organ is primarily responsible for nutrient absorption in the digestive system?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Colon

Answer

Liver

Question 9

Which enzyme begins the digestion of carbohydrates in the mouth?

Accepted Answer

Salivary amylase

Answer

Lipase

Answer

Trypsin

Answer

Pepsin

Question 10

What is the primary function of the stomach in digestion?

Accepted Answer

To break down food using acids and enzymes

Answer

To absorb nutrients

Answer

To eliminate waste

Answer

To store bile

Question 11

What is the role of bile in digestion?

Accepted Answer

To emulsify fats

Answer

To absorb vitamins

Answer

To break down carbohydrates

Answer

To digest proteins

Question 12

What is the purpose of the villi in the small intestine?

Accepted Answer

To increase surface area for absorption

Answer

To produce digestive enzymes

Answer

To transport food to the stomach

Answer

To store bile

Question 13

Which test is used to detect the presence of starch in food?

Accepted Answer

Iodine test

Answer

Biuret test

Answer

Fehling's test

Answer

Benedict's test

Question 14

In the iodine test, what color change indicates the presence of starch?

Accepted Answer

Blue-black

Answer

Green

Answer

Red

Answer

Yellow

Question 15

What is the result of a positive Biuret test?

Accepted Answer

Purple color

Answer

No color change

Answer

Pink color

Answer

Yellow color

Question 16

Which test is used to identify the presence of reducing sugars in a food sample?

Accepted Answer

Benedict's test

Answer

Iodine test

Answer

Ethanol emulsion test

Answer

Biuret test

Related quizzes

Related quizzes