Biomolecule Worksheet 1 Koushlandre singh
1. Structure of glycogen is similar to :
(a) Amylose (b) Amylopectin (c) Cellulose (d) Glucose
2. Which of the following polymer is stored in the liver of animals?
(a) Amylose (b) Cellulose (c) Amylopectin (d) Glycogen
3. Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives _________.
(a) 2 molecules of glucose (b) 2 molecules of glucose + 1 molecule of fructose
(c) 1 molecule of glucose + 1 molecule of fructose (d) 2 molecules of fructose
4. α-helix structure of protein is stabilised by :
(a) Peptide bonds (b) van der Waals forces (c) Hydrogen bonds (d) Dipole-dipole interactions
5. Which of the following acids is a vitamin?
(a) Aspartic acid (b) Ascorbic acid (c) Adipic acid (d) Saccharic acid
6. Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon
atoms of pentose sugars of nucleotides are these linkages present?
(a) 5′ and 3′ (b) 1′ and 5′ (c) 5′ and 5′ (d) 3′ and 3
7. Nucleic acids are the polymers of ______________.
(a) Nucleosides (b) Nucleotides (c) Bases (d) Sugars
8. Each polypeptide in a protein has aminoacids linked with each other in a specific sequence. This sequence of
amino acids is said to be ____________.
(a) primary structure of proteins. (b) secondary structure of proteins.
(c) tertiary structure of proteins. (d) quaternary structure of proteins.
9. DNA and RNA contain four bases each. Which of the following bases is not present in RNA?
(a) Adenine (b) Uracil (c) Thymine (d) Cytosine
10. Which of the following B group vitamins can be stored in our body?
(a) Vitamin B1 (b) Vitamin B2 (c) Vitamin B6 (d) Vitamin B12
11. Which of the following bases is not present in DNA?
(a) Adenine (b) Thymine (c) Cytosine (d) Uracil
12. Which of the following reactions of glucose can be explained only by its cyclic structure?
(a) Glucose forms pentaacetate. (b) Glucose reacts with hydroxylamine to form an oxime. (c)
Pentaacetate of glucose does not react with hydroxylamine.
(d) Glucose is oxidised by nitric acid to gluconic acid.
13. Sucrose is a __________.
(a) monosaccharide (b) polysaccharide (c) reducing sugar (d) non-reducing sugar
14. Which of the following carbohydrates are branched polymer of glucose?
(a) Amylose & Amylopectin (b) Cellulose & Glycogen (c) Amylopectin & Glycogen (d) Amylose & Cellulose
Given below are two statements labelled as Assertion (A) and Reason (R) Select the most appropriate answer from the
options given below:
(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 but R is true
(e) Both A and R are false statements
15. Assertion (A): D(+) – Glucose is dextrorotatory in nature.
Reason (R): ‘D’ represents its dextrorotatory nature.
16. Assertion (A): Vitamin D can be stored in our body.
Reason (R): Vitamin D is fat soluble vitamin. Koushlandre singh
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17. Assertion (A): All naturally occurring α-amino acids except glycine are optically active.
Reason (R): Most naturally occurring amino acids have L-configuration.
18. Assertion (A): Glycine must ‘be taken through diet.
Reason (R): It is an essential amino acid.
19. Assertion (A): In presence of enzyme, substrate molecule can be attacked by the reagent effectively.
Reason (R): Active sites of enzymes hold the substrate molecule in a suitable position.
20. Assertion (A) : Deoxyribose, C5H10 O4 is not a carbohydrate.
Reason (R) : Carbohydrates are hydrates of carbon so compounds which follow Cx (H2O)y formula are carbohydrates.
21. Name the linkage that holds two monosaccharide units together ……………………………………
22. Name the linkage present in protein - …………………………………………..
23. Name the linkage in polypeptide chain in a nucleic acid - …………………………………………………….
24. Name the disease caused by the deficiency of Vitamin A -
25. Name the disease caused by the deficiency of Vitamin D -
26. Name the disease caused by the deficiency of Vitamin C -
27. Name the disease caused by the deficiency of Vitamin B1 -
28. Name the disease caused by the deficiency of Vitamin K -
29. Name the disease caused by the deficiency of Vitamin B12 -
30. Name the disease caused by the deficiency of Vitamin E -
31. Write two vitamins soluble in water - 1. 2.
32. What is the basic difference between Glucose and fructose
33. What is the basic difference between cellulose and starch
34. What is the basic difference between Amylose and Amylopectin
35. What is the difference between α-glucose and β glucose
36. Which of the two components of starch is water soluble - ………………………….
37. What are the different types of RNA –
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38. Why vitamin C can not be stored in our body -
39. Write two differences between globular and fibrous protein with example
Globular protein Fibrous protein
Ex- Ex-
40. Write difference between essential and non-essential amino acids with example
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Essential amino acids Non-essential amino acids
Ex- Ex-
41. Write difference between α-helix and β-pleated structure.
42. Differentiate between amylose and amylopectin.
1
2
43 Diffentiate between DNA and RNA
DNA RNA
Sugar-
Base-
Structure -
Function -
44. Write difference between Nucleoside and Nucleotide
45 Define the following terms :
1. Glycosidic linkage –
2. Peptide linkage –
3. Reducing Sugar –
4. Invert sugar –
5. Oligosaccharides –
6. Denaturation of protein –
7. Primary structure of protein–
8. Secondary structure of protein –
9. Anomers –
10. Nucleic acid –
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46. Why amino acids have high melting and boiling points?/ why amino acids are amphoteric in nature/why amino
acids are crystalline in nature.
47. Where does the water present in the egg go after boiling?
48. Two strands of DNA are not identical but complementary. Comment
49. What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
50. When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained. What does
this fact suggest about the structure of RNA?
51. What happens when D-glucose react with :
(a) Bromine water (b) HCN (c) Acetic anhydride [ CH3CO)2O ] (d) Conc HNO3 (e) HI
What can be proved / infer from these reaction in each case
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52. What is the structural feature characterising reducing sugar?
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