All Free Everyday Science MCQs with Answers

1031. Tuberculosis is a _________ infection?

• A. Viral
• B. Bacterial
• C. Fungal
• D. Parasitic

Explanation: Tuberculosis is caused mainly by the bacterium Mycobacterium tuberculosis and commonly affects the lungs. It is not caused by a virus, fungus, or parasite.

1032. Vaccination is synonymous with ___________ immunity?

• A. Artificial Active
• B. Natural Active
• C. Allergy
• D. None of These

Explanation: Vaccination introduces an antigen artificially and stimulates the person's own immune system to form memory cells, so it produces artificial active immunity. Passive immunity involves receiving ready-made antibodies instead.

1033. Thanatology is the study of _________?

• A. Careers
• B. Being
• C. Death
• D. Soul

Explanation: Thanatology combines the Greek word for death with the study of a subject, so it examines death, dying and related psychological, social and medical issues. It is not specifically the study of the soul or careers.

1034. _______ bacterial disease affects Eye?

• A. Trachoma
• B. Rickets
• C. Osteoporosis
• D. Gum disease

Explanation: Trachoma is a bacterial eye infection caused by certain strains of Chlamydia trachomatis and can cause blindness if untreated. Rickets and osteoporosis affect bones rather than primarily the eye.

1035. Deficiency of vitamin E in the human body causes __________?

• A. Muscle weakness and vision problem
• B. Bone problem
• C. Rickets
• D. Osteoporosis

Explanation: Vitamin E protects cell membranes and nerve tissue, so severe deficiency may cause muscle weakness and vision or nerve problems. Rickets and osteoporosis are chiefly linked to vitamin D and mineral imbalance.

1036. Deficiency of vitamin "D" in human body can causes____?

• A. Gum disease
• B. Skin problem
• C. osteoporosis and fractures
• D. Eye-sighted weakness

Explanation: Vitamin D is needed to absorb calcium and maintain mineralised bones, so deficiency weakens bones and increases the risk of fractures and osteoporosis. In children, the classic deficiency disease is rickets.

1037. Dr. James Watson discovered the structure of DNA in __________?

• A. 1953
• B. 1955
• C. 1957
• D. 1857Physics

Explanation: Watson and Crick proposed the double-helix structure of DNA in 1953, using crucial evidence including Rosalind Franklin's X-ray diffraction work. The question says Watson alone, but the year and intended option are clear.

1038. How Many Brains Does an Octopus Have?

• A. 7
• B. 8
• C. 9
• D. 6

Explanation: An octopus is commonly described as having nine brains: one central brain and eight major nerve centres associated with its arms. The arm nerve centres help each arm process information and coordinate movement.

1039. Outer layer of the human skin is called __________?

• A. Hypodermis
• B. Dermis
• C. Hemidermis
• D. Epidermis

Explanation: The epidermis is the outer protective layer of skin, while the dermis lies beneath it and contains blood vessels, nerves and glands. The hypodermis is deeper still and contains much fatty tissue.

1040. There are almost _______of nephrons in the each kidney in human body?

• A. 5 million
• B. 3 million
• C. 1 million
• D. 10 million

Explanation: Each human kidney contains approximately one million nephrons, its microscopic filtration units. Their glomeruli filter blood and their tubules adjust the filtrate to form urine.