IGCSE Biology Paper-1: Specimen Questions with Answers 105 - 106 of 208

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Question 105

Question

MCQ▾

Disease of mitochondria results due to the failure of mitochondria. Which of the following is a symptom of mitochondrial disease.

Choices

Choice (4)

a.

Seizures

b.

Gastro-intestinal disorders

c.

Muscle weakness and pain

d.

All a., b. and c. are correct

Answer

d.

Explanation

Mitochondrial diseases are occur due to the failure of mitochondria. Dysfunction in the mitochondria fails to produce energy that is needed for the sustainment of life and growth of an organism. Injury in the cell results in the production of low energy. If the process happens in whole body, the whole system begins to fail. The mitochondrial disease causes most of the damage to the cells of brain, heart, liver, muscles, kidney, respiratory and the endocrine systems.

Question 106

Question

MCQ▾

The figure shows which organ

Figure Shows a Part of Human System – Name the Part

Choices

Choice (4)

a.

Kidney

b.

Lungs

c.

Liver

d.

Bladder

Answer

a.

Explanation

A pair of kidney is present in the back of the abdomen. Within each kidney are an estimated one million microscopic nephrons. Filtering of the blood takes place within these areas. Each nephron contains a cluster of capillaries called a glomerulus. A cup-shaped sac called a Bowman՚s capsule surrounds each glomerulus.

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