biology : class12 Malaria-Related Anemia : Causative Organism, Plasmodium, Life Cycle, Symptoms, Prevention : Malaria MCQ Questions and Answers
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Malaria-Related Anemia
MCQ questions and answers.
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MCQ Questions
1. What is a major cause of anemia during malaria infection?
A.
Destruction of red blood cells by Plasmodium
B.
Increase in the number of platelets
C.
Formation of extra bone tissue
D.
Increase in white blood cell size
Correct Answer:
Destruction of red blood cells by Plasmodium
Explanation:
Plasmodium infects and destroys red blood cells, reducing their number and causing malaria-related anemia.
2. Which blood cells are mainly affected in malaria-related anemia?
A.
Red blood cells
B.
White blood cells
C.
Platelets
D.
Plasma cells
Correct Answer:
Red blood cells
Explanation:
The malaria parasite develops inside red blood cells, which may rupture and be destroyed during the infection.
3. A reduction in red blood cells during malaria can lead to which condition?
A.
Anemia
B.
Diabetes
C.
Arthritis
D.
Jaundice caused by excess bile only
Correct Answer:
Anemia
Explanation:
Anemia occurs when the blood has too few red blood cells or too little hemoglobin, which can happen when malaria destroys red blood cells.
4. Which symptom may result from malaria-related anemia?
A.
Tiredness and weakness
B.
Improved muscle strength
C.
Unusually rapid hair growth
D.
Increased night vision
Correct Answer:
Tiredness and weakness
Explanation:
Anemia reduces the blood's oxygen-carrying capacity, often causing tiredness and weakness.
5. Why can malaria-related anemia cause shortness of breath during activity?
A.
Less oxygen is transported by the blood
B.
The blood contains too much oxygen
C.
The lungs produce fewer red blood cells
D.
The stomach absorbs too much water
Correct Answer:
Less oxygen is transported by the blood
Explanation:
A reduced number of red blood cells or hemoglobin decreases oxygen delivery to body tissues, which may cause breathlessness during activity.
6. Which substance in red blood cells is reduced when malaria causes anemia?
A.
Hemoglobin
B.
Insulin
C.
Bile
D.
Saliva
Correct Answer:
Hemoglobin
Explanation:
Malaria-related destruction of red blood cells can reduce hemoglobin, the substance responsible for carrying oxygen.
7. Which sign may be seen in a person with malaria-related anemia?
A.
Pale skin
B.
Blue hair
C.
Swollen fingernails only
D.
Increased skin pigmentation in every case
Correct Answer:
Pale skin
Explanation:
Paleness can occur when the number of red blood cells or the amount of hemoglobin is reduced.
8. Why may repeated malaria infections worsen anemia?
A.
Repeated infections can cause repeated loss of red blood cells
B.
They permanently increase red blood cell production
C.
They convert red blood cells into platelets
D.
They stop all oxygen use by body cells
Correct Answer:
Repeated infections can cause repeated loss of red blood cells
Explanation:
Each infection can destroy red blood cells, so repeated malaria infections may increase the severity of anemia.
9. Which group is especially vulnerable to severe malaria-related anemia?
A.
Young children
B.
Healthy adults who have never had malaria only
C.
People with no blood cells
D.
Individuals with naturally blue blood
Correct Answer:
Young children
Explanation:
Young children can develop severe anemia more easily because malaria may destroy red blood cells rapidly in them.
10. How can preventing malaria help reduce malaria-related anemia?
A.
It prevents Plasmodium from destroying red blood cells
B.
It changes red blood cells into white blood cells
C.
It increases the body's need for oxygen
D.
It removes all hemoglobin from the blood
Correct Answer:
It prevents Plasmodium from destroying red blood cells
Explanation:
Preventing malaria prevents the infection of red blood cells and reduces the risk of anemia caused by their destruction.
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