Biomolecules MCQs Multiple Choice Questions with Answers

1. What branch of science deals with processes in living things that involve biomolecules?
a. Molecular biology
b. Biochemistry
c. Microbiology
d. Mycology
Answer: b. Biochemistry

2. All the chemical reactions that occur inside of a cell are collectively known as…?
a. Anabolism
b. Catabolism
c. Metabolism
d. None of these
Answer: c. Metabolism

3. Which of the following term is used for carbohydrates?
a. Alkaloids
b. Sweets
c. Saccharides
d. Polypeptides
Answer: c. Saccharides

4. Which of the following are the simplest sugars?
a. Monosaccharide
b. Oligosaccharides
c. Polysaccharide
d. Disaccharide
Answer: a. Monosaccharide

5. What is the normal glucose level of blood?
a. 10 gm/litre (1%)
b. 100 gm/litre (10%)
c. 0.1 gm/litre (0.01%)
d. 1 gm/litre (0.1%)
Answer: d. 1 gm/litre (0.1%)

6. The covalent bond between two monosaccharides is known as…?
a. Peptide bond
b. Glycosidic bond
c. Pyranose
d. Any of these
Answer: b. Glycosidic bond

7. Which of the following is pure cellulose?
a. sugar cane
b. Carrot
c. Cotton
d. Jute
Answer: c. Cotton

8. Acylglycerols are composed of which of the following?
a. Glycol
b. Glycerol and fatty acids
c. Glycol and fatty acids
d. Only fatty acids
Answer: b. Glycerol and fatty acids

Recommended: Biomolecules Online Practice Test

9. Calculate the specific gravity of the oil. If a body weighs 160g in air 130 g in water and 136g in oil what is the.
a. 0.1
b. 0.2
c. 0.8
d. 1.5
Answer: c. 0.8

10. Waxes found in nature as a coating on green leaves contains which of the following alkanes?
a. C1 to C4
b. C6 to C8
c. C15 to C18
d. C29 to C31
Answer: d. C29 to C31

11. Which of the following is the repeating unit of terpenoids?
a. Vinyl chloride
b. Isoprenoid
c. Phospholipids
d. Amino acids
Answer: b. Isoprenoid

12. Which of the biomolecules made up 50% of their total dry weight?
a. Lipids
b. Carbohydrates
c. Proteins
d. Vitamins
Answer: c. Proteins

13. Which biomolecule is made up of only hydrogen, carbon and oxygen?
a. Lipids
b. Carbohydrates
c. Proteins
d. Nucleic acids
Answer: b. Carbohydrates

14. Which of the following structure is present in hemoglobin?
a. Primary structure
b. Secondary structure
c. Tertiary structure
d. Quaternary structure
Answer: d. Quaternary structure

15. Which of the following is the incorrect statement regarding lipid’s role in our bodies?
a. Act as hormones
b. Make up part of cell membrane
c. Store energy
d. Generate heat
Answer: d. Generate heat

16. Which of the following is the functional group formed when glycerol reacts with carboxylic acids to form triglycerides?
a. Ester
b. Ether
c. Carbohydrate
d. Carboxylic acid
Answer: a. Ester

17. Which of the following nitrogenous base is absent in Ribonucleic acid?
a. Thymine
b. Uracil
c. Cytosine
d. Adenine
Answer: a. Thymine

18. Which of the following biomolecule is distributed more widely in a cell?
a. DNA
b. RNA
c. Chloroplast
d. Spaherosomes
Answer: b. RNA

19. Which of the following is reducing sugar?
a. Gluconic acid
b. Galactose
c. Sucrose
d. β-methyl galactosidase
Answer: b. Galactose

20. Which is the least abundant RNA in a cell?
a. rRNA
b. tRNA
c. mRNA
d. tRNA threonine
Answer: c. mRNA

21. Which is the most abundant type of RNA in a cell?
a. rRNA
b. tRNA
c. mRNA
d. tRNA threonine
Answer: a. rRNA

22. Which of the following minerals are associated with cytochrome?
a. Mg
b. Cu and Ag
c. Fe and Cu
d. Cu
Answer: c. Fe and Cu

23. Which of the following is the most common secondary structure of proteins?
a. β-pleated sheet
b. β-pleated sheet parallel
c. α-helix
d. β-pleated sheet non-parallel
Answer: c. α-helix

24. Which of the following physiologist coined the term “enzyme” in 1877?
a. Steven Pinker
b. William James
c. Albert Bandura
d. Wilhelm Kühne
Answer: d. Wilhelm Kühne

25. Where does β-oxidation of fatty acids take place?
a. Nucleus
b. Cell membrane
c. Oxysomes head
d. Perimitochondrial space
Answer: d. Perimitochondrial space

26. Which of the following enzymes splits triglycerides into fatty acids and monoglycerides?
a. Lipase
b. Pepsim
c. Amylase
d. Maltase
Answer: a. Lipase

27. Which of the following is the most abundant biomolecule on earth?
a. Carbohydrates
b. Proteins
c. Mineral salts
d. Lipids
Answer: a. Carbohydrates

28. Almost all the bonds involved in organic compounds are…?
a. Ionic bonds
b. Covalent bonds
c. Metallic bonds
d. All of these
Answer: b. Covalent bonds

29. Which of the following amino acids has a net negative charge at pH 7?
a. Asparapgine
b. Glutamic Acid
c. Lysine
d. Histidine
Answer: b. Glutamic Acid

30. Choose the correct example of condensation polymers?
a. Teflon
b. Butyl rubber
c. Bakelite
d. Melamine formaldehyde resin
Answer: c. Bakelite

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