Free Biotechnology MCQs with Answers
731 Biotechnology MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biotechnology in health care applies biological organisms, cells or enzymes to diagnose and treat disease. The subject includes recombinant DNA, genetically engineered insulin, vaccines, antibiotics, monoclonal antibodies, gene therapy and techniques such as polymerase chain reaction, while distinguishing therapeutic applications from agricultural and industrial biotechnology.
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- A. Sesbania
- B. Bacillus popilliae
- C. Anabaena
- D. Bacillus subtilis
Explanation: Azolla plays a very important role in rice production. Azolla and its nitrogen-fixing partner, Anabaena, has been used as green manure to…
Correct answer: Anabaena- A. Inland fisheries
- B. Aspergillosis
- C. Marine fisheries
- D. Both (a) and (c).
Explanation: Aquaculture involves the production of useful aquatic plants and animals such as fishes, prawns, shrimps, lobsters, crabs, molluscs by…
Correct answer: Both (a) and (c).- A. Gambusia
- B. Cutter fish
- C. Anabus
- D. Rohu.
Explanation: Gambusia affinis is regarded as a larvicidal fish as it selectively feeds on mosquito larvae.
Correct answer: Gambusia- A. 6 weeks
- B. 10 weeks
- C. 10 days
- D. 15 days.
Explanation: A highly organised division of labour is found in the colony of honey bees.
Correct answer: 6 weeks605. Hybridoma cells are
- A. Only cells having oncogenes
- B. Product of spore formation in bacteria
- C. Nervous cells of frog
- D. Hybrid cells resulting from myeloma cells.
Explanation: Hybridoma is a hybrid cell resulting from the artificial fusion of an antibody-producing lymphocyte and a myeloma cell from a lymphoid…
Correct answer: Hybrid cells resulting from myeloma cells.606. The reason for vegetatively reproducing crop plants to suit for maintaining hybrid vigour is that
- A. They are more resistant to diseases
- B. Once a desired hybrid produced, no chances of losing it
- C. They can be easily propagated
- D. They have a longer life span.
Explanation: Hybrid vigour or heterosis is defined as the superiority of the hybrid over its parents. It is lost on inbreeding.
Correct answer: Once a desired hybrid produced, no chances of losing it- A. Immunization
- B. Genetic engineering
- C. Tissue culture
- D. Biotechnology.
Explanation: Genetic engineering is the experimental manipulation of genetic material, especially for industrial or medical uses.
Correct answer: Genetic engineering- A. Inbreeding
- B. Euthenics
- C. Eugenics
- D. None of these.
Explanation: Euthenics is the suitable environment for human well being, health and intellect.Inbreeding involves production of progenies by mating…
Correct answer: Eugenics609. Which of the following is a New World spice that has become an essential part of Indian cuisine?
- A. Red pepper
- B. Black pepper
- C. Ginger
- D. Cardamom
Explanation: New world crops are those which have their centre of origin in America.
Correct answer: Red pepper- A. Recessive mutation express immediately
- B. Induction of mutations is easier
- C. Culturing is easier
- D. Dominant mutation expressed immediately.
Explanation: Haploids are preferred over diploids for mutation study because in haploids recessive mutation is easier.
Correct answer: Recessive mutation express immediately- A. Reimei of rice
- B. Prabhat of arhar
- C. Sharbati sonora of wheat
- D. Aruna of castor
Explanation: Aruna of castor is a crop variety which is not due to induced mutations.
Correct answer: Aruna of castor- A. Require one half of nutrients
- B. Are helpful in study of meiosis
- C. Grow better under adverse conditions
- D. Form perfect homozygous.
Explanation: In crop movement programme, haploids are important because they form perfect homozygous lines.
Correct answer: Form perfect homozygous.- A. Recombinant DNA is formed
- B. Complementary DNA is formed
- C. Mutant DNA is formed
- D. cDNA is formed
Explanation: Recombinant DNA (rDNA) molecules are DNA molecules formed by laboratory methods of genetic recombination (such as molecular cloning) to…
Correct answer: Recombinant DNA is formed614. Restriction enzymes, which cut the DNA at specific sites, characterized by specific sequence of:
- A. Four nucleotides
- B. Eight nucleotides
- C. Six nucleotides
- D. Four or six nucleotides
Explanation: Restriction enzymes cut the DNA at very specific sites characterized by specific sequence of four or six nucleotides arranged…
Correct answer: Four or six nucleotides- A. They cannot bind
- B. They can bind by complementary base pairing
- C. They can bind by non-complementary base pairing
- D. They cannot bind due to noncomplementary base pairing
Explanation: Due to base pairing affinity sticky ends can stick together, whenever brought closer to each other.
Correct answer: They can bind by complementary base pairing- A. Restriction endonuclease
- B. DNA ligase
- C. Vector
- D. Primase
Explanation: To make recombinant DNA, one often begins by selecting a vector, the means by which recombinant DNA is introduced into a host cell.
Correct answer: Vector- A. pBR 322
- B. pSC 101
- C. RP4
- D. R388
Explanation: pSC 101 has antibiotic resistant gene for tetracycline.
Correct answer: pSC 101- A. pSC101
- B. pBR322
- C. RP4
- D. R388
Explanation: pBR 322 has antibiotic resistant genes for tetracycline as well as ampicillin.
Correct answer: pBR322- A. Molecule
- B. Organism
- C. Cell
- D. Molecule, cell and organisms
Explanation: Cloning can be carried out at cell, organ and organism levels.
Correct answer: Molecule, cell and organisms- A. Recombinant DNA
- B. Plasmid
- C. Recombinant plasmid
- D. Extra chromosomal DNA
Explanation: Aqueous calcium chloride is used in genetic transformation of cells by increasing the cell membrane permeability, inducing competence for…
Correct answer: Recombinant plasmid