Biomolecules Test

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Biomolecules Test - 16

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Question 1
1 / -0

Directions: This question consist of two statements, each printed as Assertion and Reason. While answering this question, you are required to choose any one of the following four responses.

Assertion : D(+)– Glucose is dextrorotatory in nature.
Reason : ‘D’ represents its dextrorotatory nature.

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

C
If the Assertion is correct but Reason is incorrect.

D
If both the Assertion and Reason are incorrect.

Solution

Glucose is correctly named as D (+)−. ′ D ′ before the name of glucose represents the configuration whereas′ (+) ′ represents the dextrorotatory nature of the molecule. The letter ′ D ′ or ′ L ′ before the name of any compound indicates the relative configuration of a particular stereoisomer.
Question 2
1 / -0

Directions: In this question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Deoxyribose, C₅H₁₀O₄ is not a carbohydrate.
Reason (R): Carbohydrates are optically active polyhydroxy aldehyde or polyhydroxy ketone or substances which give aldehyde or ketone on hydrolysis.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false

D
A is false and R is True

Solution

Deoxyribose, C₅H₁₀O₄ is a carbohydrate and is the sugar moiety of DNA.
Question 3
1 / -0

Directions: This question consist of two statements, each printed as Assertion and Reason. While answering this question, you are required to choose any one of the following four responses.

Assertion β-glycosidic linkage is present in maltose
Reason : Maltose is composed of two glucose units in which C–1 of one glucose unit is linked to C–4 of another glucose unit.

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

C
If the Assertion is correct but Reason is incorrect.

D
If the Assertion is incorrect and Reason is correct

Solution

Maltose is composed of two α−D− glucose units in which C−1 of one glucose (I) is linked to C−4 of another glucose unit (II).
Question 4
1 / -0

Directions: In this question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): The two strands of DNA are complementary to each other.
Reason (R): The hydrogen bonds are formed between specific pairs of bases.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false

D
A is false and R is True

Solution

The two strands of DNA are complementary to each other and hydrogen bonds are formed between specific pairs of bases.
Question 5
1 / -0

Directions: This question consist of two statements, each printed as Assertion and Reason. While answering this question, you are required to choose any one of the following four responses.

Assertion : Vitamin D cannot be stored in our body
Reason : Vitamin D is fat soluble vitamin and is excreted from the body in urine

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

C
If the Assertion is correct but Reason is incorrect.

D
If both the Assertion and Reason are incorrect.

Solution

Vitamin D is a fat soluble vitamin and can be stored in the body since it is not excreted out of the body.
Question 6
1 / -0

Directions: In this question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Glycine must be taken through diet.
Reason (R): It is non-essential amino acid.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false

D
A is false and R is True

Solution

Glycine must not be taken through diet because it can be synthesized in our body and a non-essential amino acid.
Question 7
1 / -0

Directions: This question consist of two statements, each printed as Assertion and Reason. While answering this question, you are required to choose any one of the following four responses.

Assertion : Sucrose is called an invert sugar.
Reason : On hydrolysis, sucrose bring the change in the sign of rotation from dextro (+) to laevo(–).

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

C
If the Assertion is correct but Reason is incorrect.

D
If both the Assertion and Reason are incorrect.

Solution

The hydrolysis of sucrose brings about a change in the sign of rotation from dextro (+) to laevo (–) and the product is named as invert sugar.
Question 8
1 / -0

Directions: In this question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Glucose reacts with hydroxylamine to form an oxime and also adds a molecule of hydrogen cyanide to give cyanohydrin.
Reason (R): The carbonyl group is present in the openchain structure of glucose.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false

D
A is false and R is True

Solution

Glucose reacts with hydroxylamine to form an oxime and also adds a molecule of hydrogen cyanide to give cyanohydrin which confirms the presence of the carbonyl group in the open chain structure of glucose.
Question 9
1 / -0

Directions: This question consist of two statements, each printed as Assertion and Reason. While answering this question, you are required to choose any one of the following four responses.

Assertion : At isoelectric point, the amino group does not migrate under the influence of electric field.
Reason : At isoelectric point, amino acid exists as a zwitterion.

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

C
If the Assertion is correct but Reason is incorrect.

D
If both the Assertion and Reason are incorrect.
Question 10
1 / -0

Directions: In this question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): All naturally occurring α amino acids except glycine are optically active.
Reason (R): Most naturally occurring α amino acids have L-configuration.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is NOT the correct explanation of A

C
A is true but R is false

D
A is false and R is True

Solution

Most of the naturally occurring amino acids have L−configuration. All naturally occurring a−amino acids are optically active except glycine.

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Biomolecules Test - 16

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Biomolecules Test - 16

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Question 1

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

Solution

Question 2

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false and R is True

Solution

Question 3

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If the Assertion is incorrect and Reason is correct

Solution

Question 4

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false and R is True

Solution

Question 5

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

Solution

Question 6

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false and R is True

Solution

Question 7

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

Solution

Question 8

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false and R is True

Solution

Question 9

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

Question 10

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false and R is True

Solution

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