Science Series 2026 - Biology Human 02

Question 1: Inflammation at a wound site (redness, swelling) mainly indicates:

Less blood flow

More digestion

Immediate bone formation

Question 2: Fever during infection can be beneficial because it:

Stops blood circulation

Stops digestion permanently

Prevents oxygen transport

Can slow growth of some pathogens and boosts immune response

Question 3: Vaccination helps prevent diseases by:

Replacing blood with lymph

Stopping respiration

Stimulating the body to produce antibodies and memory cells

Killing all microbes instantly forever

Question 4: Immunity developed after vaccination is called:

Natural passive immunity

Artificial active immunity

Artificial passive immunity

Natural active immunity only

Question 5: Which of these is a common sign of an allergic reaction?

Increased bile

Bone fracture

Sneezing and itching

Low urine volume

Question 6: The chemicals released by certain immune cells during allergy include:

Histamine

Bile

Pepsin

Insulin

Question 7: Which of these diseases is caused by a virus and prevented by vaccination?

Goitre

Rickets

Polio

Scurvy

Question 8: Which statement about antibiotics is correct?

They are vaccines

They cure all viral infections

They replace antibodies

They work against bacteria, not viruses

Question 9: When a cut occurs, blood clots to prevent:

Excessive blood loss and entry of germs

Urine formation

Digestion

Gas exchange

Question 10: The organ that filters blood and helps in immune functions (basic level) is the:

Spleen

Trachea

Appendix

Gall bladder

Question 11: The lymphatic system helps in transport of:

Food to stomach

Oxygen to brain only

Urine to bladder

Fats absorbed from small intestine

Question 12: The swelling of lymph nodes during infection happens because:

They store urine

They are actively producing and storing immune cells

They stop filtering lymph

They store bile

Question 13: Which of the following is NOT part of the immune system?

White blood cells

Red blood cells

Skin

Lymph nodes

Question 14: What is an antigen?

A substance that triggers immune response

A type of bone

A digestive enzyme

A waste product

Question 15: Which of these is an example of a communicable disease?

Rickets

Measles

Goitre

Diabetes

Question 16: A disease that spreads through contaminated water is:

Rickets

Cholera

Asthma

Scurvy

Question 17: The best immediate practice to prevent spread of many infections is:

Sleeping less

Eating more sugar

Avoiding water

Washing hands with soap

Question 18: Which barrier in the respiratory tract traps dust and germs?

Bile

Mucus and cilia

Alveoli only

RBCs

Question 19: The acidic nature of stomach juice helps immunity by:

Preventing digestion

Growing bacteria faster

Killing many microbes in food

Increasing blood sugar

Question 20: Vaccines are generally made from:

Pure glucose

Bile salts

Weakened or inactivated pathogens or their parts

Bone marrow

Quizzes » Science Series 2026 - Biology Human 02