Every Book Back multiple-choice question from Health and Diseases (10th Standard Science, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Tobacco consumption is known to stimulate secretion of adrenaline. The component causing this could be
- A. NicotineCorrect
- B. Tannic acid
- C. Curcumin
- D. Leptin
Explanation. Nicotine is the active component of tobacco and it stimulates the adrenal gland to release adrenaline. Curcumin comes from turmeric and leptin is a body hormone.
Q2
World 'No Tobacco Day' is observed on
- A. May 31Correct
- B. June 6
- C. April 22
- D. October 2
Explanation. World No Tobacco Day falls on 31 May every year and is observed to raise awareness of the harm caused by tobacco use.
Q3
Cancer cells are more easily damaged by radiations than normal cells because they are
- A. Different in structure
- B. Non-dividing
- C. Mutated Cells
- D. Undergoing rapid divisionCorrect
Explanation. Radiation harms cells most while they are dividing. Cancer cells divide rapidly and uncontrollably, so they are struck far more often than normal cells.
Q4
Which type of cancer affects lymph nodes and spleen?
- A. Carcinoma
- B. Sarcoma
- C. Leukemia
- D. LymphomaCorrect
Explanation. Lymphoma is the cancer of lymphoid tissue, which includes the lymph nodes and the spleen. Carcinoma affects epithelial cells and leukemia affects blood.
Q5
Excessive consumption of alcohol leads to
- A. Loss of memory
- B. Cirrhosis of liverCorrect
- C. State of hallucination
- D. Supression of brain function
Explanation. Prolonged use of alcohol causes fatty liver, which develops into cirrhosis. The liver is the organ that bears the lasting damage from heavy drinking.
Q6
Coronary heart disease is due to
- A. Streptococci bacteria
- B. Inflammation of pericardium
- C. Weakening of heart valves
- D. Insufficient blood supply to heart musclesCorrect
Explanation. Cholesterol deposited in the blood vessels narrows them, so the heart muscle receives too little blood. That insufficient supply is coronary heart disease.
Q7
Cancer of the epithelial cells is called
- A. Leukemia
- B. Sarcoma
- C. CarcinomaCorrect
- D. Lipoma
Explanation. Carcinoma is the cancer arising in epithelial cells. Sarcoma arises in connective tissue and leukemia in blood forming tissue.
Q8
Metastasis is associated with
- A. Malignant tumourCorrect
- B. Benign tumour
- C. Both (a) and (b)
- D. Crown gall tumour
Explanation. Metastasis is the spread of cancer cells to other parts of the body, and only malignant tumours do this. A benign tumour stays confined to one place.
Q9
Polyphagia is a condition seen in
- A. Obesity
- B. Diabetes mellitusCorrect
- C. Diabetes insipidus
- D. AIDS
Explanation. Polyphagia means excessive hunger and is one of the classic signs of diabetes mellitus, along with excessive thirst and excessive urination.
Q10
Where does alcohol effect immediately after drinking?
- A. Eyes
- B. Auditory region
- C. Liver
- D. Central nervous systemCorrect
Explanation. Alcohol acts at once on the central nervous system as a sedative, depressing it. Damage to the liver builds up only over prolonged use.
About these Health and Diseases questions
These are the Book Back multiple-choice questions for Health and Diseases from the Tamil Nadu State Board (Samacheer Kalvi) 10th Standard Science syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Health and Diseases?
This chapter has 10 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 10th Standard Science MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Health and Diseases book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
