Biosynthesis refers to the synthesis of biomolecules inside our body. It is a multi enzymatic and multistep process. Macromolecules like carbohydrates, proteins, fats, DNAs, etc. are synthesized in our body. Even the monomers like amino acids for proteins and nucleotides for DNA, RNA are synthesized inside. Biosynthesis is the anabolic pathway of metabolism.
1. Arthropods have an exoskeleton made up of chitin. It is a polymer of
(a) D-glucosamine
(b) keratin sulphate and chondroitin sulphate
(c) lipoglycans
(d) N-acetyl glucosamine
Answer: (d)
2. Phosphodiester bond is present in
(a) monosaccharides in a polysaccharide
(b) fatty acids in a diglyceride
(c) nucleic acids in a nucleotide
(d) amino acids in a polypeptide
Answer: (c)
3. An example of a non-reducing carbohydrate is
(a) ribose 5-phosphate
(b) lactose
(c) sucrose
(d) maltose
Answer: (c)
4. Phosphoglyceride is made up of
(a) unsaturated or saturated fatty acids linked to phosphate to which glycerol is attached
(b) unsaturated or saturated fatty acids linked to glycerol to which phosphate is attached
(c) only saturated fatty acids linked to glycerol to which phosphate is attached
(d) only unsaturated fatty acids linked to glycerol to which phosphate is attached
Answer: (b)
5. Which of the following inhibits the action of succinic dehydrogenase by competitive inhibition?
(a) malate
(b) oxaloacetate
(c) 𝜶-ketoglutarate
(d) None of the above
Answer: (b)
6. Which of the following is a precursor of amino acid synthesis?
(a) fatty acids
(b) 𝜶-ketoglutaric acid
(c) mineral salts
(d) volatile acids
Answer: (b)
7. Phosphoenol pyruvate is the primary acceptor for CO2 fixation in
(a) C3 plants
(b) C4 plants
(c) C2 plants
(d) both (a) and (b)
Answer: (b)
8. Which of the following is the primary acceptor for CO2 fixation in C3 plants?
(a) PGA
(b) PEP
(c) RuBP
(d) RMP
Answer: (c)
9. The start condon for protein synthesis is
(a) AUG
(b) UAA
(c) UAG
(d) UGA
Answer: (a)
10. Ribosomal RNA is synthesized in
(a) ribosomes
(b) lysosomes
(c) nucleolus
(d) nucleoplasm
Answer: (c)
| Also Check: Types Of Biochemical Pathways |
11. The First phase of protein synthesis or translation is
(a) binding of mRNA to the ribosome
(b) anticodon recognition
(c) DNA recognition
(d) tRNA aminoacylation
Answer: (d)
12. The enzyme involved in the opening of DNA double helix during transcription
(a) DNA helicase
(b) DNA ligase
(c) RNA polymerase
(d) DNA polymerase
Answer: (c)
13. Which of the following cell organelles is the site of glycoprotein and glycolipid formation?
(a) Peroxisomes
(b) Polysomes
(c) Golgi bodies
(d) Endoplasmic reticulum
Answer: (c)
14. Glycosidic and peptide bonds are present respectively in
(a) Glycerol, trypsin
(b) Chitin, cholesterol
(c) Inulin, Insulin
(d) Cellulose, lecithin
Answer: (c)
15. Which of the following is an important precursor for purine synthesis?
(a) Leucine
(b) Glutamine
(c) Aspartate
(d) Glycine
Answer: (d)
16. Which of the following is an important precursor for pyrimidine synthesis?
(a) Leucine
(b) Glutamine
(c) Aspartate
(d) Glycine
Answer: (c)
17. Erythrose 4-phosphate is a precursor of which amino acid?
(a) Tyrosine
(b) Phenylalanine
(c) Tryptophan
(d) All of the above
Answer: (d)
18. The catecholamines, norepinephrine and epinephrine are derived from
(a) arginine
(b) tyrosine
(c) tryptophan
(d) histidine
Answer: (b)
19. Phospholipids are
(a) monoglycerides
(b) diglycerides
(c) triglycerides
(d) Any of the above
Answer: (c)
20. Precursor of fatty acid synthesis is
(a) actoacetyl CoA
(b) succinyl CoA
(c) propionyl CoA
(d) acetyl CoA
Answer: (d)
These were some MCQs on Biosynthesis. Learn MCQs on related topics for NEET, at BYJU’S.
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