Free Biotechnology and Health Care MCQs with Answers
233 Biotechnology and Health Care 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 applies genetic engineering, cell culture and recombinant DNA methods to medicine and public health. The material includes production of insulin, vaccines and antibiotics, diagnostic techniques, gene therapy, genetically modified organisms and the ethical concerns surrounding manipulation of human genes.
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233 questions · page 7 of 12
- A. Actinopods
- B. Foraminiferans
- C. Apicomplexans
- D. Radiolarians
Explanation: Chalk is formed largely from accumulated calcium carbonate shells of dead foraminiferans, microscopic marine protists.
Correct answer: Foraminiferans- A. Phaeophyta
- B. Rhodophyta
- C. Pyrrophyta
- D. Chrysophyta
Explanation: Brown algae belong to the phylum Phaeophyta, whose brown colour is mainly due to the carotenoid pigment fucoxanthin masking chlorophyll.
Correct answer: Phaeophyta- A. Pellicle
- B. Penicle
- C. Calcium
- D. Cell wall
Explanation: A pellicle is a firm but flexible protein-rich covering beneath the cell membrane of ciliates, and it maintains their definite shape while…
Correct answer: Pellicle- A. Chrysophyta
- B. Phaeophyta
- C. Pyrrophyta
- D. Rhodophyta
Explanation: Golden algae are classified in Chrysophyta, and their golden colour is associated with carotenoid pigments such as fucoxanthin.
Correct answer: Chrysophyta- A. Trichonymphas
- B. Trypanosoma
- C. Euglena
- D. Radiolarians
Explanation: Trichonympha are complex flagellated protists that live symbiotically in the intestines of termites, where they help digest cellulose.
Correct answer: Trichonymphas- A. Dinoflagellates
- B. Zooflagellates
- C. Protozoans
- D. Algae
Explanation: Molecular evidence has traditionally placed euglenoids close to zooflagellates, particularly because of shared flagellated and cellular…
Correct answer: Zooflagellates- A. Ciliate
- B. Foraniniferan
- C. Actinopods
- D. Apicomplexan
Explanation: Stentor is a trumpet-shaped ciliate covered with cilia and uses them to create water currents that bring food toward its oral region.
Correct answer: Ciliate- A. True
- B. False
- C. May be true may be false
- D. Unpredictable
Explanation: The statement is false because it uses the absolute word all, whereas not every photosynthetic euglenoid necessarily loses its chlorophyll…
Correct answer: False- A. 27
- B. 28
- C. 26
- D. 29
Explanation: In the classification system used by the source text, Kingdom Protista is divided into 27 phyla.
Correct answer: 27- A. Unicellular
- B. Multicellular
- C. Both of these
- D. Zooflagellates
Explanation: Most dinoflagellates are unicellular organisms with two flagella and characteristic grooves in their cell covering.
Correct answer: Unicellular- A. Ciliates
- B. Apicomplexans
- C. Actinopods
- D. Foraminferans
Explanation: Plasmodium is an apicomplexan, a group of parasitic protists that possess an apical complex used to enter host cells.
Correct answer: Apicomplexans- A. 100
- B. 200
- C. 3000
- D. 4000
Explanation: About 200 mushroom species are generally reported as edible, although the exact number varies with classification and regional use.
Correct answer: 200- A. Parasitic fungi
- B. Predators
- C. Mutualists
- D. Decomposers
Explanation: Decomposer fungi obtain nutrients by secreting enzymes onto dead organic matter and absorbing the soluble products.
Correct answer: Decomposers- A. Rusts
- B. Mushrooms
- C. Molds
- D. Yeasts
Explanation: Yeasts are usually unicellular fungi, whereas rusts, mushrooms and molds are mainly multicellular and form hyphae or larger fruiting…
Correct answer: Yeasts- A. Edible mushrooms
- B. Poisonous mushrooms
- C. Both of these
- D. None of these
Explanation: Death cap, death angel and Jack-o'-lantern mushrooms contain toxic compounds and are classified as poisonous mushrooms.
Correct answer: Poisonous mushrooms- A. Mushrooms morels and truffles
- B. Rusts smuts and molds
- C. Penicillium
- D. All of these
Explanation: Rusts, smuts and many molds include fungi that cause diseases in plants, animals or humans, so they are commonly grouped as pathological…
Correct answer: Rusts smuts and molds- A. Hyperchloesterolemia
- B. Cystic fibrosis
- C. Severe combined immunodeficiency syndrome
- D. AIDS
Explanation: Cystic fibrosis results from mutations in the CFTR gene, which normally produces a transmembrane chloride channel.
Correct answer: Cystic fibrosis- A. Human beings
- B. Influenza Virus
- C. Hemophilus Influenza
- D. None of these
Explanation: Haemophilus influenzae was the first free-living organism whose complete genome was sequenced, in 1995, establishing an important…
Correct answer: Hemophilus Influenza- A. Carbon dioxide
- B. Chlorofluorocarbons
- C. UV rays
- D. Deforestation
Explanation: Chlorofluorocarbons release chlorine radicals in the stratosphere, and these radicals catalytically destroy ozone molecules.
Correct answer: Chlorofluorocarbons- A. Sterilization
- B. Disinfection
- C. Antisepsis
- D. Preservation
Explanation: Sterilization destroys or removes all forms of microbial life, including resistant spores, from an object or material.
Correct answer: Sterilization