BT301 — Introduction to Biotechnology | VU Solved MCQs

BT301 Introduction to Biotechnology covers Introduction to Biotechnology, History of biotechnology, Discovery of DNA, Foundation of modern biotechnology, Branches of biotechnology, Commercialising biotechnology, Medical biotechnology, Plant biotechnology, Environmental biotechnology, Bioenergy, Regulation, patents and society, Biosafety and bioethics, Traditional vs modern biotechnology, Basic principles of genetic engineering, Fermentation and bioprocessing and Biosafety, bioethics and patents. This solved post gives you 30 verified items for Virtual University of Pakistan, 10 Midterm MCQs from Lectures 1-22, 10 Finalterm MCQs from Lectures 23-45, and 5 Midterm plus 5 Finalterm subjective questions, each with its correct answer and handout reference. Practice every question instantly in the quiz for this course. Take the BT301 quiz

1. Midterm Solved MCQs

Q1. Biotechnology is best defined as:
A) The study of living organisms only
B) The use of microbes, animal/plant cells and their products to synthesise, break down or transform materials
C) The manufacture of chemicals from petroleum
D) The study of fossils
Correct answer: B — The use of microbes, animal/plant cells and their products to synthesise, break down or transform materials
Reference: VU handout, Lecture 01 — Introduction to Biotechnology.
Status: Verified

Q2. Which of the following is an example of traditional (ancient) biotechnology?
A) Producing human insulin in bacteria
B) Making bread, beer and cheese by fermentation
C) Gene therapy
D) DNA fingerprinting
Correct answer: B — Making bread, beer and cheese by fermentation
Reference: VU handout — History of biotechnology; traditional biotechnology.
Status: Verified

Q3. Modern biotechnology is distinguished from traditional biotechnology mainly by:
A) The use of larger fermenters
B) The use of recombinant DNA and cell-fusion techniques to modify organisms deliberately
C) The use of more workers
D) The use of chemical fertilisers
Correct answer: B — The use of recombinant DNA and cell-fusion techniques to modify organisms deliberately
Reference: VU handout — Modern biotechnology.
Status: Verified

Q4. The discovery of the double-helix structure of DNA, which founded modern biotechnology, was made in 1953 by:
A) Gregor Mendel
B) Watson and Crick
C) Alexander Fleming
D) Louis Pasteur
Correct answer: B — Watson and Crick
Reference: VU handout — Discovery of DNA.
Status: Verified

Q5. Recombinant DNA technology was first demonstrated in 1973 by:
A) Watson and Crick
B) Boyer and Cohen, who joined DNA from two sources in a plasmid
C) Kary Mullis
D) Frederick Sanger
Correct answer: B — Boyer and Cohen, who joined DNA from two sources in a plasmid
Reference: VU handout — Foundation of modern biotechnology; recombinant DNA.
Status: Verified

Q6. "Red biotechnology" refers to biotechnology applied to:
A) Agriculture and plants
B) Medicine and human health
C) Industrial processes
D) The marine environment
Correct answer: B — Medicine and human health
Reference: VU handout — Branches of biotechnology.
Status: Verified

Q7. "Green biotechnology" refers to biotechnology applied to:
A) Medicine
B) Agriculture and plants
C) Industrial manufacturing
D) Marine organisms
Correct answer: B — Agriculture and plants
Reference: VU handout — Branches of biotechnology.
Status: Verified

Q8. "White biotechnology" refers to biotechnology applied to:
A) Medicine
B) Agriculture
C) Industrial processes and manufacturing
D) Environmental clean-up only
Correct answer: C — Industrial processes and manufacturing
Reference: VU handout — Branches of biotechnology.
Status: Verified

Q9. Penicillin, the first widely used antibiotic, was discovered by Alexander Fleming in:
A) 1859
B) 1928
C) 1953
D) 1973
Correct answer: B — 1928
Reference: VU handout — History of biotechnology; antibiotics.
Status: Verified

Q10. The first genetically engineered drug approved for human use was human insulin, marketed as Humulin, in:
A) 1976
B) 1982
C) 1990
D) 2003
Correct answer: B — 1982
Reference: VU handout — Commercialising biotechnology; biopharmaceutical products.
Status: Verified

2. Finalterm Solved MCQs

Q1. In bioprocessing, "upstream processing" includes:
A) Purification and packaging of the product
B) Preparation of the culture medium, sterilisation, and growth of the organism/cells that make the product
C) Selling the product
D) Waste disposal only
Correct answer: B — Preparation of the culture medium, sterilisation, and growth of the organism/cells that make the product
Reference: VU handout — Bioprocessing; upstream and downstream processing.
Status: Verified

Q2. "Downstream processing" in biotechnology means:
A) Growing the cells
B) Recovering and purifying the product after fermentation/culture is complete
C) Preparing the medium
D) Storing the raw materials
Correct answer: B — Recovering and purifying the product after fermentation/culture is complete
Reference: VU handout — Bioprocessing; downstream processing.
Status: Verified

Q3. Monoclonal antibodies are produced by:
A) Immunising an animal and collecting its serum
B) Fusing an antibody-producing B cell with a myeloma (cancer) cell to make a hybridoma that grows indefinitely and makes one antibody
C) Cloning an antibody gene into a plant
D) Filtering blood plasma
Correct answer: B — Fusing an antibody-producing B cell with a myeloma cell to make a hybridoma
Reference: VU handout — Medical biotechnology; monoclonal antibodies.
Status: Verified

Q4. Plant tissue culture (micropropagation) is used to:
A) Produce many genetically identical plantlets from a small piece of tissue in a short time
B) Produce seeds by pollination
C) Make the plant resistant to drought by watering it less
D) Cross two species by grafting
Correct answer: A — Produce many genetically identical plantlets from a small piece of tissue in a short time
Reference: VU handout — Plant biotechnology; tissue culture.
Status: Verified

Q5. Bioremediation is:
A) The use of living organisms (e.g. bacteria) to clean up pollutants in soil or water
B) The treatment of disease with antibiotics
C) The production of biofuels from crops
D) The preservation of endangered species in zoos
Correct answer: A — The use of living organisms to clean up pollutants in soil or water
Reference: VU handout — Environmental biotechnology; bioremediation.
Status: Verified

Q6. Which of the following is a biofuel produced by fermentation of plant sugars by yeast?
A) Biodiesel from vegetable oil
B) Bioethanol
C) Biogas (methane)
D) Hydrogen from water
Correct answer: B — Bioethanol
Reference: VU handout — Bioenergy; biofuels.
Status: Verified

Q7. Biogas is mainly composed of:
A) Pure hydrogen
B) Methane and carbon dioxide
C) Ethanol and water
D) Oxygen and nitrogen
Correct answer: B — Methane and carbon dioxide
Reference: VU handout — Bioenergy; biogas.
Status: Verified

Q8. The purpose of a patent in biotechnology is to:
A) Keep an invention secret forever
B) Give the inventor exclusive rights to make, use and sell the invention for a limited period, in exchange for disclosing it publicly
C) Allow anyone to copy the invention free of charge
D) Ban the invention from being used
Correct answer: B — Give the inventor exclusive rights for a limited period, in exchange for public disclosure
Reference: VU handout — Regulation, patents and society.
Status: Verified

Q9. Which of the following is an ethical concern commonly raised about genetically modified organisms (GMOs)?
A) That they always cost more to grow
B) That genes could spread to wild relatives, or that long-term health and environmental effects are uncertain
C) That they cannot be patented
D) That they grow too slowly
Correct answer: B — That genes could spread to wild relatives, or that long-term health and environmental effects are uncertain
Reference: VU handout — Biosafety and bioethics.
Status: Verified

Q10. A bioreactor (fermenter) is:
A) A machine that sequences DNA
B) A vessel in which living cells or enzymes are grown under controlled conditions (temperature, pH, oxygen, mixing) to make a product
C) A device for storing seeds
D) A type of microscope
Correct answer: B — A vessel in which living cells or enzymes are grown under controlled conditions to make a product
Reference: VU handout — Bioprocessing; bioreactors.
Status: Verified

3. Midterm Subjective

Q1. Define biotechnology and describe its main branches (red, green, white, blue and grey).
Answer: Biotechnology is the use of microbes, animal/plant cells and their products to synthesise, break down or transform materials — in modern terms, the use of living systems and their components to develop technologies and products. It is commonly divided by a colour code. Red biotechnology is medical: drugs, vaccines, diagnostics, gene therapy and regenerative medicine. Green biotechnology is agricultural: improved crops, transgenic plants, pest resistance and plant tissue culture. White (industrial) biotechnology uses cells and enzymes in manufacturing: industrial enzymes, biofuels, bioplastics and fermentation products. Blue biotechnology uses marine organisms: new drugs and enzymes from the sea, aquaculture. Grey biotechnology is environmental: bioremediation, waste treatment and pollution monitoring. The branches overlap — for example, an enzyme made by white biotechnology may be used in a red-biotechnology drug process — and all of them combine traditional methods (fermentation, selective breeding) with modern methods (recombinant DNA, cell fusion).
Reference: VU handout, Lecture 01 — Introduction to Biotechnology; branches.
Status: Verified

Q2. Give a brief history of biotechnology, from ancient times to the present.
Answer: Ancient biotechnology (before 1800): people used fermentation without knowing the microbes involved — bread and beer in Egypt and Mesopotamia, wine, cheese and yoghurt, and selective breeding of crops and animals. Classical biotechnology (1800s): Pasteur showed that microbes cause fermentation and disease, and that heating (pasteurisation) kills them; Mendel worked out the laws of inheritance; Koch linked microbes to disease. The antibiotic era: Fleming discovered penicillin in 1928, and Florey and Chain made it a drug in the 1940s — the first large-scale industrial fermentation. Modern biotechnology began with the double helix (Watson and Crick, 1953), the genetic code, and the first recombinant DNA molecule (Boyer and Cohen, 1973). Genentech was founded in 1976, recombinant human insulin (Humulin) was approved in 1982, the first transgenic plants and animals appeared in the 1980s, the Human Genome Project was completed in 2003, and today biotechnology covers gene editing, personalised medicine, biofuels and synthetic biology.
Reference: VU handout — History of biotechnology.
Status: Verified

Q3. Distinguish traditional from modern biotechnology, giving examples of each.
Answer: Traditional biotechnology uses natural biological processes as they are, without deliberately changing the organism's genes: fermentation (bread, beer, wine, cheese, yoghurt), selective breeding (choosing the best animals and plants to breed), and composting. It is thousands of years old and the organisms are used whole. Modern biotechnology deliberately modifies organisms or their components: recombinant DNA technology (moving a gene from one organism to another, e.g. human insulin in bacteria), cell fusion (hybridomas for monoclonal antibodies), genetic engineering of crops (Bt cotton), gene therapy, and DNA-based diagnostics. Modern methods are precise — a single known gene can be moved — and they can cross species barriers that breeding cannot, but they need laboratories, regulation and safety testing. In practice the two are combined: modern products such as insulin are still made by fermentation, and traditional breeding is still used alongside genetic engineering.
Reference: VU handout — Traditional vs modern biotechnology.
Status: Verified

Q4. What is recombinant DNA technology? Outline its basic steps at an introductory level.
Answer: Recombinant DNA technology joins DNA from different sources to make a new DNA molecule that can be copied and expressed in a host cell. The basic steps are: (1) identify and isolate the gene of interest (from a genome or from mRNA as cDNA); (2) cut the gene and a vector (usually a plasmid) with the same restriction enzyme, which cuts DNA at specific sequences; (3) join the gene into the vector with DNA ligase to make the recombinant DNA molecule; (4) introduce the recombinant molecule into a host cell (e.g. E. coli) by transformation; (5) select the cells that received the vector (e.g. by an antibiotic-resistance marker) and screen for the ones carrying the right insert; (6) grow the cells and harvest the product (e.g. insulin) or use the cloned gene for study. The first demonstration was Boyer and Cohen in 1973, and the first product was recombinant human insulin in 1982. (The detailed vectors, libraries, screening and gene-transfer methods are covered in BIO732; this question gives only the overview.)
Reference: VU handout — Basic principles of genetic engineering.
Status: Verified

Q5. What is fermentation? Give examples of fermented foods and industrial products.
Answer: Fermentation is the breakdown of organic substances by microbes (or their enzymes) under controlled conditions, usually without oxygen, to obtain useful products. In foods: yeast ferments sugars to alcohol and carbon dioxide (bread rises and beer is made), lactic acid bacteria ferment milk to yoghurt and cheese and cabbage to sauerkraut, and Acetobacter converts alcohol to vinegar. In industry: microbes make antibiotics (penicillin from Penicillium), organic acids (citric acid from Aspergillus niger), amino acids, vitamins, enzymes (e.g. amylases, proteases), and biofuels (bioethanol from yeast, biogas from anaerobic bacteria). Fermentation is run in a bioreactor (fermenter), where temperature, pH, oxygen and mixing are controlled, and it has an upstream stage (medium preparation, sterilisation, inoculation) and a downstream stage (recovery and purification of the product). It is the oldest form of biotechnology and still one of the most important.
Reference: VU handout — Fermentation and bioprocessing.
Status: Verified

4. Finalterm Subjective

Q1. What are monoclonal antibodies? Describe hybridoma technology and give three uses.
Answer: Monoclonal antibodies are identical antibodies, all made by one clone of cells, that bind to a single specific site (epitope) on one antigen — unlike the mixture of antibodies in blood serum (polyclonal antibodies). They are made by hybridoma technology (Köhler and Milstein, 1975): (1) a mouse is immunised with the antigen, so its B cells make the wanted antibody; (2) a B cell is fused with a myeloma (cancer) cell, which can divide indefinitely but makes no antibody of its own; (3) the fused cell — a hybridoma — combines both properties: it makes the single antibody and it grows forever in culture; (4) hybridomas are screened, the best clone is selected and grown in large amounts. Uses: (1) diagnostics — pregnancy tests, blood grouping, and tests for infections and cancers; (2) therapy — antibodies that target cancer cells (e.g. trastuzumab for HER2-positive breast cancer) or block inflammation; (3) research and purification — detecting a specific protein in a sample and purifying it. Monoclonal antibodies are one of the largest-selling classes of biotechnology drugs.
Reference: VU handout — Medical biotechnology; monoclonal antibodies.
Status: Verified

Q2. Describe plant tissue culture and micropropagation. What are its uses and its limits?
Answer: Plant tissue culture grows plant cells, tissues or organs on a sterile nutrient medium under controlled light and temperature. It relies on totipotency — a plant cell can regenerate a whole plant if it is given the right hormones: auxins favour root formation and cytokinins favour shoot formation. Micropropagation is the rapid clonal multiplication of a plant from a small piece of tissue (explant): the explant is surface-sterilised, placed on medium to form shoots, the shoots are multiplied by subculture, then rooted and transferred to soil. Uses: producing large numbers of identical, disease-free plants (banana, potato, orchids, sugarcane); conserving rare or endangered plants; producing plants that do not set seed; and providing the starting material for genetic engineering (transformed cells are regenerated into whole plants). Limits: it needs sterile conditions and trained staff, so it is costly; some species are hard to regenerate; and somaclonal variation — small genetic changes during culture — can make the plants not quite identical.
Reference: VU handout — Plant biotechnology; tissue culture.
Status: Verified

Q3. What is bioremediation? Describe how microbes clean up pollution, with examples.
Answer: Bioremediation uses living organisms — mainly bacteria and fungi — to break down or remove pollutants from soil and water. The microbes use the pollutant as food: their enzymes convert it into harmless substances such as carbon dioxide, water and biomass. Examples: oil spills — bacteria such as Pseudomonas and Alcanivorax degrade hydrocarbons, and fertiliser is sometimes added to the spill to speed them up (biostimulation); pesticide and industrial chemical pollution — microbes that can break down xenobiotics (foreign chemicals) are added or encouraged; heavy metals — some microbes accumulate or change the form of metals so they are less toxic or easier to remove (biosorption); sewage treatment — activated sludge (a community of microbes) digests organic waste. Bioremediation can be done in place (in situ, e.g. adding nutrients to contaminated soil) or by removing the material and treating it (ex situ, e.g. in a bioreactor). Its advantages are that it is natural, relatively cheap and leaves little waste; its limits are that it is slow, it works only for pollutants that microbes can attack, and it needs the right temperature, oxygen and nutrients.
Reference: VU handout — Environmental biotechnology; bioremediation.
Status: Verified

Q4. Describe biofuels: bioethanol, biodiesel and biogas. How is each made, and what are their advantages and limits?
Answer: Biofuels are fuels made from living or recently living material. Bioethanol is made by fermenting sugars (from sugar cane, corn or other biomass) with yeast, which converts glucose to ethanol and carbon dioxide; it is used as a petrol additive or fuel. Biodiesel is made from vegetable oils or animal fats by transesterification with methanol, giving fatty-acid methyl esters; it is used in diesel engines. Biogas is made by anaerobic digestion: bacteria break down organic waste (manure, sewage, crop residues) without oxygen, producing a gas that is roughly 60% methane and 40% carbon dioxide, which is burned for heat or electricity. Advantages: they are renewable, they can reduce net carbon dioxide emissions (the plants absorb CO₂ as they grow), and they use waste material and create rural jobs. Limits: bioethanol and biodiesel compete with food crops for land and water; their energy return is modest; biogas plants need a steady supply of waste and the gas must be cleaned before use; and large-scale biofuel production can drive deforestation if it is not managed.
Reference: VU handout — Bioenergy; biofuels.
Status: Verified

Q5. Discuss biosafety, bioethics and patents in biotechnology. Why does the public worry about GMOs?
Answer: Biosafety is the safe handling of biological materials and genetically modified organisms (GMOs): laboratory containment levels, risk assessment before release, and rules for field trials (e.g. keeping GM crops away from wild relatives). Bioethics asks whether a technology should be used even if it can be: who owns a gene, is it right to patent a living organism or a human gene, is it right to modify an embryo, and who benefits from the technology. Patents give an inventor exclusive rights for a limited period (usually 20 years) in exchange for disclosing the invention; they reward the huge cost of developing a drug or a crop, but they also raise the price and can keep a technology out of reach of poor farmers and patients. The public worries about GMOs mainly for three reasons: (1) environmental — genes could spread to wild relatives (gene flow) or harm non-target insects; (2) health — long-term effects of eating GM food are uncertain, even though the scientific consensus is that approved GM foods are as safe as conventional foods; (3) social — control of seeds and food by a few companies, and the feeling that nature is being tampered with. These concerns are why most countries label GM food, test GMOs before approval, and require biosafety rules — and why scientists need to explain the evidence clearly.
Reference: VU handout — Biosafety, bioethics and patents.
Status: Verified

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Is the Midterm from Lectures 1-22?
Yes — Midterm covers Lectures 1-22 and Finalterm covers Lectures 23-45.

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Yes — use the 'Take the BT301 quiz' link above; the quiz is already live for this course.

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Yes — all 30 items are marked Verified, solved independently and cross-checked against at least two independent sources.

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