General Science | Grade 08|Unit 04 Exercise
To Test Your Knowledge Click here Quiz Unit 04
A. MCQs :
- The most effective method to prevent a disease is
a. surgery
b. organ transplant
c. vaccination*
d. radiotherapy - If a nitrogen-fixing gene from cyanobacteria is successfully inserted in plant root cells:
a. plant roots will fail to grow.
b. plant roots will fix nitrogen.*
c. plant roots will develop cyanobacteria inside.
d. plant roots will kill cyanobacteria. - A genetically modified rice variety with more iron content will help to treat:
a. anaemia.*
b. night blindness.
c. rickets.
d. colour blindness. - Deficiency of insulin in human causes:
a. diabetes.*
b. heart disease.
c. hypertension.
d. epilepsy. - Which of the following can be used as a biofuel?
a. Kerosene oil
b. High octane
c. Methane
d. Ethanol* - Which of the following is not a product of biotechnology?
a. Polythene*
b. Insulin
c. Human growth hormone
d. Thymosin - Baking process uses enzymes from:
a. wheat.
b. rice.
c. corn.
d. yeast.* - A gene from one organism can be inserted into another one by:
a. tissue culture.
b. cloning.
c. genetic engineering.*
d. hybridization. - What could be the advantage of using microorganisms like bacteria to get useful products by genetic engineering?
a. Bacteria grow at a very fast rate*
b. Bacteria cannot be seen with naked eye.
c. Bacteria cause infections.
d. Bacteria die very soon. - The best solution to hereditary diseases is:
a. vaccination.
b. immunization.
c. chemotherapy.
d. gene therapy.*
B. Short Questions :
- What could be the advantages of microbe-produced dyes over synthetic dyes?
- Microbe-produced dyes are eco-friendly, biodegradable, and non-toxic. They reduce environmental pollution and use renewable resources, unlike synthetic dyes.
- Give the advantages of using biodegradable plastic.
- Biodegradable plastic reduces environmental waste, decomposes naturally, and lowers pollution levels, contributing to sustainable waste management.
- What is the significance of fermented food?
- Fermented food is rich in probiotics, aids digestion, boosts immunity, and enhances the nutritional value of food by breaking down complex nutrients.
- How can biotechnology transform the way of treating diseases?
- Biotechnology enables gene therapy, development of personalized medicines, production of vaccines, and innovative treatments like immunotherapy.
- What could be the best solution to mineral deficiency diseases in third-world countries?
- Biofortification of crops, development of supplements, and ensuring food security with fortified food can address mineral deficiencies effectively.
C. Long Questions :
- Explain how biotechnology is helping to solve issues of food shortage.
- Biotechnology helps increase crop yields through genetically modified (GM) crops, develops pest-resistant plants, enhances nutritional value through biofortification, and creates drought-tolerant varieties. It also enables efficient use of resources and reduces reliance on chemical fertilizers.
- What are the applications of biotechnology?
- Applications include:
- Medicine: Production of vaccines, gene therapy, and diagnostics.
- Agriculture: GM crops, pest-resistant plants, and biofertilizers.
- Environment: Bioremediation, waste management, and production of biodegradable materials.
- Industrial: Enzymes for food, textiles, and biofuel production.
- Applications include:
D. Structured Question :
- Think like a biotechnologist:
Steps to solve plastic pollution in water bodies using the mushroom:
-
- Step 1 : Identify mushroom genes responsible for plastic breakdown.
- Step 2: Genetically engineer bacteria or algae to incorporate these genes.
- Step 3: Release these modified organisms into water bodies to break down plastic pollution.