General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
31
Goitre is associated with:
Answer:
Thyroid gland
Goitre is abnormal swelling of the thyroid gland due to iodine deficiency. It causes visible neck enlargement. Adding iodized salt helps prevent it.
32
Haemophilia means failure of:
Answer:
Blood to clot
Haemophilia is a genetic disorder where clotting factors are absent or deficient. Patients bleed excessively from injuries. It is managed with clotting factor therapy.
33
Which of the following is NOT a viral disease?
Answer:
Cholera
Cholera is caused by *Vibrio cholerae* (a bacterium). In contrast, rabies, AIDS, and chickenpox are viral. This highlights the importance of identifying causative agents.
34
Anaemia in humans is caused by deficiency of:
Answer:
Iron
Iron deficiency is the most common cause of anaemia. Folic acid and B12 deficiencies may also cause other forms. Iron supplements and diet correction are effective.
35
Which of the following is bacterial?
Answer:
Tetanus
Tetanus is caused by *Clostridium tetani* bacteria. It produces toxins that cause muscle stiffness and spasms. Vaccination is highly effective for prevention.
36
Iron deficiency causes:
Answer:
Anaemia
Iron deficiency leads to a reduced hemoglobin level. This causes fatigue, weakness, and pale skin. It is one of the most common nutritional deficiencies worldwide.
37
The virus causing AIDS is:
Answer:
HIV
Human Immunodeficiency Virus (HIV) is responsible for AIDS. It integrates into host DNA, making it hard to eliminate. Antiretroviral therapy helps control infection.
38
AIDS virus destroys which system of the body?
Answer:
Immune
HIV targets CD4+ T-cells, weakening the immune system. This leaves patients vulnerable to infections and cancers. Without treatment, it progresses to AIDS.
39
Decreased insulin secretion results in:
Answer:
Diabetes
Insulin is secreted by the pancreas to regulate blood sugar. Deficiency or resistance causes diabetes mellitus. It leads to high blood sugar and long-term complications.
40
Tuberculosis is what type of infection?
Answer:
Bacterial
TB is caused by *Mycobacterium tuberculosis*. It mainly affects the lungs but can spread to other organs. It spreads through airborne droplets.