IGCSE Biology Paper-3: Specimen Questions with Answers 326 - 327 of 358

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Passage

Cholera is an example of a transmissible disease.

Question 326 (1 of 7 Based on Passage)

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Write in Brief

One Liner▾

Cholera causes diarrhea.

(i) Describe what is meant by the term diarrhea.

Explanation

Diarrhea is a condition in which faeces are discharged from the bowels frequently and in a liquid form.

Question 327 (2 of 7 Based on Passage)

Write in Short

Short Answer▾

Bacteria are often used in biotechnology.

Complete the sentences using words from the list to explain why bacteria are used.

Each word may be used once, more than once or not at all.

Bacteria are useful in biotechnology and … engineering due to their … reproduction rate and their ability to make … molecules.

Explanation

Bacteria are useful in biotechnology and genetic engineering due to their rapid reproduction rate and their ability to make simple molecules.

Bacteria are used in industry in a few ways that generally exploit their natural metabolic capabilities. They are used in manufacture of foods and production of antibiotics, probiotics, drugs, vaccines, starter cultures, insecticides, enzymes, fuels, and solvents. In addition, with genetic engineering technology, bacteria can be programmed to make various substances used in food science, agriculture, and medicine. The genetic systems of bacteria are the foundation of the biotechnology industry.

Reproduction of Bacteria

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