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Question 1

What is the primary test used to detect proteins in a sample?

Answer 1

Biuret test

Question 2

True or False: The Benedict’s test is used to detect the presence of starch.

Answer 2

False

Question 3

Fill in the blank: The _______ test is used to detect reducing sugars.

Answer 3

Benedict’s

Question 4

What color change occurs in the Biuret test if proteins are present?

Answer 4

Violet

Question 5

Which test is used for detecting lipids?

Answer 5

Sudan III test

Question 6

Multiple Choice: Which of the following tests can detect starch? A) Biuret test B) Iodine test C) Benedict’s test

Answer 6

B) Iodine test

Question 7

What is the principle behind the Sudan III test?

Answer 7

It stains lipids red.

Question 8

True or False: A negative Benedict’s test indicates the absence of all sugars.

Answer 8

False

Question 9

What is the color of the solution when starch is present in an iodine test?

Answer 9

Blue-black

Question 10

Which test is used to confirm the presence of non-reducing sugars?

Answer 10

Acid hydrolysis followed by Benedict’s test

Question 11

Fill in the blank: The _______ test can indicate the presence of proteins, but it is not specific.

Answer 11

Biuret

Question 12

What reagent is used in the Ninhydrin test?

Answer 12

Ninhydrin

Question 13

Multiple Choice: What is the color change in the Ninhydrin test for amino acids? A) Blue B) Yellow C) Purple

Answer 13

C) Purple

Question 14

What is the purpose of heating in the Benedict’s test?

Answer 14

To facilitate the reaction between reducing sugars and the reagent.

Question 15

True or False: The iodine test is specific for polysaccharides.

Answer 15

True

Question 16

What is the main limitation of the Biuret test?

Answer 16

It cannot distinguish between different types of proteins.

Question 17

Fill in the blank: The _______ test is commonly used to identify glucose specifically.

Answer 17

Benedict’s

Question 18

What does a positive Sudan III test indicate?

Answer 18

Presence of lipids

Question 19

Multiple Choice: Which test requires acid hydrolysis before testing for sugars? A) Iodine test B) Benedict’s test C) Biuret test

Answer 19

B) Benedict’s test

Question 20

What is the expected result of a negative iodine test?

Answer 20

No color change (remains brown)

Question 21

True or False: The Sudan III test can be used to identify proteins.

Answer 21

False

Question 22

What type of sugar does the Benedict’s test primarily detect?

Answer 22

Reducing sugars

Question 23

Fill in the blank: The _______ test can indicate the presence of both starch and glycogen.

Answer 23

Iodine

Question 24

What color indicates a positive result in the Biuret test?

Answer 24

Violet or purple

Question 25

Multiple Choice: Which of the following is NOT a carbohydrate test? A) Iodine B) Biuret C) Benedict's

Answer 25

B) Biuret

Question 26

What does the term 'reducing sugar' refer to?

Answer 26

Sugars that can donate electrons to reduce other molecules.