Biochemistry and Biotechnology
MCQ's
Easy Questions (18 Questions - 30%)
1. What is biochemistry the study of?
- A) Plants
- B) Animals
- C) Chemical processes in living organisms
- D) Rocks
2. Which molecule carries genetic information?
- A) Protein
- B) RNA
- C) DNA
- D) Lipid
3. Enzymes are:
- A) Fats
- B) Carbohydrates
- C) Proteins
- D) Minerals
4. What is the primary function of red blood cells?
- A) Defend against pathogens
- B) Carry oxygen
- C) Regulate body temperature
- D) Store energy
5. Genetic engineering involves the manipulation of:
- A) Carbohydrates
- B) Genes
- C) Lipids
- D) Water
6. Which of the following is an example of a metabolic pathway?
- A) Glycolysis
- B) Digestion
- C) Synthesis of water
- D) None of these
7. What is the purpose of vaccines?
- A) Cure diseases
- B) Provide immunity
- C) Produce enzymes
- D) None of these
8. What is biotechnology?
- A) Study of rocks
- B) Use of biological systems for human benefit
- C) Study of stars
- D) All of these
9. Which of these is a common antibiotic?
- A) Insulin
- B) Penicillin
- C) Hemoglobin
- D) DNA
10. Photosynthesis primarily occurs in:
- A) Roots
- B) Stems
- C) Leaves
- D) Flowers
11. What is bioinformatics?
- A) Use of computers to analyze biological data
- B) Creation of genetic disorders
- C) Study of rocks
- D) None of these
12. A plasmid is:
- A) A type of virus
- B) A circular DNA molecule
- C) A protein
- D) An enzyme
13. What are biopesticides?
- A) Natural pesticides derived from organisms
- B) Chemicals made in labs
- C) Rocks used to kill pests
- D) None of these
14. Enzymes primarily act as:
- A) Structural units
- B) Hormones
- C) Catalysts
- D) Antibodies
15. The main component of a DNA nucleotide is:
- A) Sugar-phosphate backbone
- B) Lipid chain
- C) Enzyme
- D) Carbohydrate
16. How is blood type determined?
- A) Enzyme activity
- B) DNA structure
- C) Presence of specific antigens
- D) Oxygen levels
17. Genetic diversity is important because:
- A) It allows adaptation to environmental changes
- B) It creates uniform organisms
- C) It reduces enzyme activity
- D) None of these
18. Stem cells are important in biotechnology because they can:
- A) Divide and create any type of cell
- B) Only create blood cells
- C) Become antibiotics
- D) None of these
Moderate Questions (24 Questions - 40%)
19. Glycolysis is the process in which:
- A) Proteins are broken down
- B) Glucose is converted into energy
- C) Lipids are synthesized
- D) DNA is replicated
20. Which of the following factors affects enzyme activity?
- A) Temperature
- B) Pressure
- C) Size of cell
- D) Presence of lipids
21. Which RNA carries the genetic code from DNA?
- A) rRNA
- B) mRNA
- C) tRNA
- D) None of these
22. Which of the following is an example of a GMO (Genetically Modified Organism)?
- A) Naturally grown corn
- B) Bt cotton
- C) Wild strawberries
- D) All of these
23. Which of these processes involves creating proteins?
- A) Glycolysis
- B) Transcription
- C) Translation
- D) Replication
24. The primary function of white blood cells is to:
- A) Carry oxygen
- B) Fight infections
- C) Transport nutrients
- D) None of these
25. Gene therapy primarily aims to:
- A) Cure genetic disorders by modifying genes
- B) Prevent diseases
- C) Create metabolic pathways
- D) Develop antibodies
26. Which is a product of photosynthesis?
- A) Carbon dioxide
- B) Oxygen
- C) Nitrogen
- D) None of these
27. The Human Genome Project aimed to:
- A) Map all human genes
- B) Create artificial DNA
- C) Destroy harmful genes
- D) Produce enzymes
28. Bioremediation is used to:
- A) Increase crop yield
- B) Clean up environmental pollutants
- C) Reduce enzyme production
- D) Study genetic diversity
29. Recombinant DNA technology is used in agriculture primarily to:
- A) Create GMOs
- B) Synthesize DNA
- C) Study metabolism
- D) Make vaccines
30. Which of the following is a role of nitrogen-fixing bacteria?
- A) Synthesize DNA
- B) Break down proteins
- C) Convert nitrogen gas into a usable form
- D) Destroy harmful bacteria
31. The primary function of blood plasma is to:
- A) Transport hormones
- B) Carry oxygen
- C) Destroy pathogens
- D) Clot blood
32. CRISPR technology is primarily used for:
- A) DNA editing
- B) Protein synthesis
- C) Lipid production
- D) None of these
33. Which molecule provides energy for cellular activities?
- A) ATP
- B) DNA
- C) Lipids
- D) Amino acids
34. A monoclonal antibody is:
- A) A protein created by a single clone of cells
- B) A DNA molecule
- C) A carbohydrate
- D) None of these
35. In cellular respiration, glucose is broken down into:
- A) Oxygen and water
- B) Carbon dioxide and water
- C) Carbon and nitrogen
- D) DNA
36. Endoplasmic reticulum assists in:
- A) DNA synthesis
- B) Protein synthesis
- C) Lipid breakdown
- D) Enzyme inhibition
37. What is the process of fermentation?
- A) Oxygen-dependent energy production
- B) Anaerobic breakdown of sugars
- C) Formation of DNA
- D) None of these
38. How do enzymes lower activation energy?
- A) By changing reaction temperature
- B) By providing an alternative pathway
- C) By altering pressure
- D) By increasing size of substrate
39. Antibiotics are primarily used to:
- A) Kill bacteria
- B) Boost immunity
- C) Treat viral infections
- D) Create proteins
40. The enzyme that synthesizes RNA from DNA is:
- A) DNA polymerase
- B) RNA polymerase
- C) Helicase
- D) Ligase
41. Which type of RNA carries amino acids during protein synthesis?
- A) mRNA
- B) tRNA
- C) rRNA
- D) None of these
42. Which of the following is a biofuel?
- A) Coal
- B) Petroleum
- C) Ethanol
- D) Natural gas
Tough Questions (18 Questions - 30%)
43. Which process synthesizes new DNA strands?
- A) Translation
- B) Replication
- C) Transcription
- D) Decomposition
44. The active site of an enzyme:
- A) Binds substrates
- B) Breaks down proteins
- C) Transports oxygen
- D) None of these
45. Which of the following is an enzyme inhibitor?
- A) Substrate
- B) ATP
- C) Antibiotic
- D) Glucose
46. How do monoclonal antibodies work?
- A) By activating enzymes
- B) By binding to specific antigens
- C) By creating new proteins
- D) By synthesizing DNA
47. In which type of respiration is oxygen used?
- A) Anaerobic
- B) Fermentation
- C) Aerobic
- D) None of these
48. What is the first step in protein synthesis?
- A) Rep
lication
- B) Transcription
- C) Translation
- D) Digestion
49. Gene expression is regulated at the level of:
- A) DNA replication
- B) Protein synthesis
- C) Transcription
- D) None of these
50. The Calvin cycle is part of:
- A) Photosynthesis
- B) Cellular respiration
- C) Glycolysis
- D) DNA synthesis
51. PCR (Polymerase Chain Reaction) is used to:
- A) Amplify DNA
- B) Synthesize RNA
- C) Break down proteins
- D) None of these
52. What role does mRNA play in the cell?
- A) Encodes amino acids
- B) Carries genetic information to ribosomes
- C) Breaks down carbohydrates
- D) Produces energy
53. In genetic engineering, restriction enzymes are used to:
- A) Break down proteins
- B) Cut DNA at specific sequences
- C) Transfer genes to plants
- D) Synthesize RNA
54. What are biofuels primarily made from?
- A) Fossil fuels
- B) Biological materials
- C) Metals
- D) None of these
55. Which molecule serves as a coenzyme in many enzymatic reactions?
- A) Lipid
- B) NADH
- C) DNA
- D) Water
56. What is the role of chlorophyll in photosynthesis?
- A) Absorbs light energy
- B) Synthesizes proteins
- C) Catalyzes glycolysis
- D) None of these
57. Which biomolecule is not typically found in cell membranes?
- A) Proteins
- B) Lipids
- C) Nucleic acids
- D) Carbohydrates
58. DNA fingerprinting is used to:
- A) Synthesize proteins
- B) Analyze genetic differences
- C) Treat infections
- D) Produce biofuels
59. In the Krebs cycle, energy is primarily released as:
- A) NADH and FADH2
- B) ATP and oxygen
- C) Carbon dioxide and water
- D) Glucose and ADP
60. Which type of bond holds the two DNA strands together?
- A) Ionic
- B) Covalent
- C) Hydrogen
- D) Metallic
Answers:
1. C, 2. C, 3. C, 4. B, 5. B, 6. A, 7. B, 8. B, 9. B, 10. C, 11. A, 12. B, 13. A, 14. C, 15. A, 16. C, 17. A, 18. A, 19. B, 20. A, 21. B, 22. B, 23. C, 24. B, 25. A, 26. B, 27. A, 28. B, 29. A, 30. C, 31. A, 32. A, 33. A, 34. A, 35. B, 36. B, 37. B, 38. B, 39. A, 40. B, 41. B, 42. C, 43. B, 44. A, 45. C, 46. B, 47. C, 48. B, 49. C, 50. A, 51. A, 52. B, 53. B, 54. B, 55. B, 56. A, 57. C, 58. B, 59. A, 60. C