Biomolecules

Biomolecules
Class:XII / Unit:14

1. Deficiency of which vitamin causes degeneration of spinal cord

E
B₁₂
K
A

2. In DNA, the consecutive deoxynucleotides are connected via

Phospho monoester linkage
Phospho diester linkage
Phospho triester linkage
Amide linkage

3. The statement that is NOT correct is

Aldose or ketose sugars in alkaline medium do not isomerise
Carbohydrates are optically active
Penta acetate of glucose does not react with hydroxylamine
Lactose has glycosidic linkage between C4 of glucose and C1 of galactose unit

4. Which of the following vitamin is water insoluble

A
B₆
E
B₁₂

5. Number of chiral carbon atom(s) in glucose is/are

One
Two
Four
Eight

6. Building block of amino acid is

DNA
Fats
Carbohydrates
Proteins

7. The nucleotide chemical components are

Heterocyclic compounds and sugar
Heterocyclic compounds, sugar and phosphate
sugar and phosphate
Heterocyclic compounds and phosphate

8. Sucrose on hydrolysis gives

β D- glucose and α D-fructose
α D- glucose and β D-fructose
α D- glucose and α D-fructose
α D- glucose and β D-glucose

9. Functional group present in amino acids are

Acid and Amine
Only aicsd
Acid and Ester
Acid and Amide

10. Amino acids may be

Acidic
Basic
Neutral
All the above