Class 8 General Science Notes: - Unit-4 - BIOTECHNOLOGY ( Solved Exercise MCQs)

(National Book Foundation - New Book/New Syllabus Based on National Curriculum Pakistan 2023-2024 and Onwards)

(Class 8 General Science Notes for 8th Centralized Exam 2023-2024 and onward, FDE, Islamabad)

A. MCQs (Choose the Correct Answers).

1. The most effective method to prevent a disease is

a. surgery.
b. vaccination.
c. organ transplant.
d. radiotherapy.

... Answer is b. vaccination.
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2. 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.

... Answer is b. plant roots will fix nitrogen.
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3. A genetically modified rice variety with more iron content will help to treat

a. anaemia.
b. night blindness
c. rickets
d. colour blindness.

... Answer is a. anaemia.
The most common nutritional cause of anaemia is iron deficiency

4. Deficiency of insulin in humans causes

a. diabetes.
b. heart disease.
c. hypertension.
d. epilepsy.

... Answer is a. diabetes.
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5. Which of the following can be used as a biofuel:

a. Kerosene oil.
b. High octane.
c. Methane.
d. Ethanol.

... Answer is d. Ethanol.
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6. Which of the following is not a product of biotechnology?

a. Polythene.
b. Insulin.
c. Human growth hormone.
d. Thymosin.

... Answer is d. Polythene.
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7. The baking process uses enzymes from

a. wheat.
b. rice.
c. corn.
d. yeast.

... Answer is a. wheat.
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8. A gene from one organism can be inserted into other one by

a. tissue culture.
b. cloning.
c. genetic engineering.
d. hybridization.

... Answer is c. genetic engineering
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9. What could be the advantage of using microorganisms like bacteria to get useful products by genetic engineering?

a. Bacteria grow at very fast rate.
b. Bacteria cannot be seen with the naked eye
c. Bacteria cause infections
d. Bacteria die very soon

... Answer is b.  Bacteria grow at very fast rate.
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10. The best solution to hereditary diseases is

a. vaccination.
b. immunization.
c. chemotherapy.
d. gene therapy.

... Answer is d. gene therapy.
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