Railway Exams (RRB) · General Science
Biology & Life Science
15 practice questions with full step-by-step solutions, plus a concept-first explainer — free, no sign-up.
What you'll learn
A from-scratch, exam-focused tour of Class 10 biology for RRB NTPC — the cell and its parts, the main human body systems, vitamins and deficiency diseases, common diseases and their causes, and basic plant biology like photosynthesis and transport. Packed with tables, a worked example and quick-revision facts.
Read Biology & Life Science Made Simple: Cells, Body, Nutrition & Plants (RRB NTPC)This chapter has
Biology & Life Science — solved practice questions
8 Railways General Science questions with step-by-step solutions. Attempt each, then reveal the answer.
- Q1easy
Which organ pumps blood throughout the human body?
- AHeart
- BLungs
- CLiver
- DKidney
Show answer & solution
Correct answer: (A) Heart
The heart is a muscular organ that pumps blood through the circulatory system.
- Q2easy
The basic structural and functional unit of life is the:
- ATissue
- BOrgan
- CCell
- DMolecule
Show answer & solution
Correct answer: (C) Cell
The cell is the basic structural and functional unit of all living organisms.
- Q3easy
Which pigment gives plants their green colour and helps in photosynthesis?
- AHaemoglobin
- BChlorophyll
- CMelanin
- DCarotene
Show answer & solution
Correct answer: (B) Chlorophyll
Chlorophyll is the green pigment in plants that absorbs sunlight for photosynthesis.
- Q4medium
How many bones are there in the adult human body?
- A201
- B300
- C212
- D206
Show answer & solution
Correct answer: (D) 206
The adult human skeleton normally has 206 bones.
- Q5medium
Which vitamin is produced in the human skin in the presence of sunlight?
- AVitamin D
- BVitamin C
- CVitamin A
- DVitamin K
Show answer & solution
Correct answer: (A) Vitamin D
Vitamin D is synthesised in the skin when it is exposed to sunlight (ultraviolet rays).
- Q6medium
The largest gland in the human body is the:
- APancreas
- BThyroid
- CLiver
- DSalivary gland
Show answer & solution
Correct answer: (C) Liver
The liver is the largest gland (and largest internal organ) in the human body.
- Q7medium
Deficiency of which nutrient causes the disease goitre?
- AIron
- BIodine
- CCalcium
- DVitamin C
Show answer & solution
Correct answer: (B) Iodine
Goitre, an enlargement of the thyroid gland, is caused by a deficiency of iodine.
- Q8easy
Which part of the plant is responsible for absorbing water and minerals from the soil?
- ALeaf
- BStem
- CFlower
- DRoot
Show answer & solution
Correct answer: (D) Root
Roots absorb water and dissolved minerals from the soil and anchor the plant.
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