Biology set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 605 questions
Q.271 A person suffering from 'Presbyopia' typically uses which type of lens for correction
A Concave lens
B Convex lens
C Bifocal lens
D Cylindrical lens
Discuss / Board
Q.272 The concept of 'Survival of the Fittest' was originally phrased by
A Charles Darwin
B Herbert Spencer
C Jean-Baptiste Lamarck
D Gregor Mendel
Discuss / Board
Q.273 Which of the following is a primary consumer in a forest ecosystem
A Tiger
B Snake
C Deer
D Eagle
Discuss / Board
Q.274 In humans the gene for Hemophilia is located on
A Autosomes
B Y-chromosome only
C X-chromosome only
D Both X and Y chromosomes
Discuss / Board
Q.275 Identify the correct sequence of the passage of air during inhalation in humans
A Nostrils Pharynx Larynx Trachea Alveoli
B Nostrils Larynx Pharynx Trachea Alveoli
C Nostrils Trachea Larynx Pharynx Alveoli
D Nostrils Pharynx Trachea Larynx Alveoli
Discuss / Board
Q.276 Which hormone is known as the 'Flight or Fight' hormone and is secreted by the adrenal medulla
A Thyroxine
B Adrenaline
C Insulin
D Oxytocin
Discuss / Board
Q.277 The 'Fluid Mosaic Model' of the cell membrane was proposed by
A Schleiden and Schwann
B Watson and Crick
C Singer and Nicolson
D Robert Hooke
Discuss / Board
Q.278 Which of the following is a vestigial organ in the human body
A Wisdom teeth
B Gallbladder
C Spleen
D Eyelids
Discuss / Board
Q.279 During photosynthesis the oxygen evolved comes from the splitting of
A Carbon dioxide
B Water
C Chlorophyll
D Glucose
Discuss / Board
Q.280 The term 'Ecosystem' was first coined by
A Charles Darwin
B A G Tansley
C E P Odum
D Humboldt
Discuss / Board
Q.281 Identify the correctly matched pair of the disease and its vector
A Malaria - Culex mosquito
B Dengue - Aedes aegypti
C Sleeping Sickness - Sand fly
D Filariasis - Anopheles mosquito
Discuss / Board
Q.282 What is the function of the enzyme Lysozyme found in human tears and saliva
A Breakdown of proteins
B Digestion of starch
C Destruction of bacterial cell walls
D Inhibition of viral replication
Discuss / Board
Q.283 The structural and functional unit of the human kidney is
A Neuron
B Nephron
C Ureter
D Glomerulus
Discuss / Board
Q.284 Which of the following statements about Phloem is true
A It transports water and minerals from roots to leaves
B It is composed of dead cells at maturity
C It transports food materials from leaves to other parts of the plant
D The flow of materials in phloem is strictly unidirectional
Discuss / Board
Q.285 The disease 'Atheletes Foot' is caused by which of the following
A Bacteria
B Fungus
C Protozoa
D Nematode
Discuss / Board
Q.286 Which endocrine gland is often referred to as the 'Biological Clock' of the human body
A Pituitary gland
B Pineal gland
C Thyroid gland
D Thymus gland
Discuss / Board
Q.287 The genetic material of a Retrovirus like HIV is
A Double stranded DNA
B Single stranded DNA
C Single stranded RNA
D Double stranded RNA
Discuss / Board
Q.288 In the human body the process of 'Dialysis' is used when which organ fails to function properly
A Heart
B Liver
C Kidneys
D Lungs
Discuss / Board
Q.289 Which of the following is not a greenhouse gas
A Methane
B Carbon dioxide
C Nitrous oxide
D Nitrogen
Discuss / Board
Q.290 The 'Islets of Langerhans' are found in which organ
A Liver
B Pancreas
C Spleen
D Pituitary
Discuss / Board
Q.291 Which among the following is the most abundant protein in the animal world
A Insulin
B Hemoglobin
C Collagen
D Trypsin
Discuss / Board
Q.292 A cross between a tall pea plant TT and a short pea plant tt results in all tall offspring in F1 generation This illustrates
A Law of Segregation
B Law of Dominance
C Incomplete Dominance
D Codominance
Discuss / Board
Q.293 The main component of the cell wall of fungi is
A Cellulose
B Hemicellulose
C Chitin
D Pectin
Discuss / Board
Q.294 Which of the following blood cells are responsible for the production of antibodies
A Neutrophils
B B-Lymphocytes
C T-Lymphocytes
D Monocytes
Discuss / Board
Q.295 The red light of the spectrum is most effective in photosynthesis because
A It has the shortest wavelength
B It is absorbed most by chlorophyll a and b
C It has the highest energy among all visible light
D It is not absorbed but reflected by plants
Discuss / Board
Q.296 Which organ in the human body is responsible for the 'Urea cycle' or detoxification of ammonia
A Kidney
B Liver
C Small Intestine
D Pancreas
Discuss / Board
Q.297 In the human eye the 'Yellow Spot' or Macula Lutea is the area of
A Maximum visual acuity
B No vision blind spot
C Maximum sensitivity to dim light
D Connection with the optic nerve
Discuss / Board
Q.298 Which of the following is an example of a reflex action
A Reading a book
B Knee-jerk response
C Riding a bicycle
D Speaking a language
Discuss / Board
Q.299 The 'Pace Maker' of the heart is located in which chamber
A Left Atrium
B Left Ventricle
C Right Atrium
D Right Ventricle
Discuss / Board
Q.300 Minamata disease was caused by eating fish contaminated with
A Cadmium
B Lead
C Methyl Mercury
D Zinc
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

Practicing Biology set 1 MCQs is one of the most effective ways to prepare for competitive examinations in 2026. This topic-wise question bank contains carefully selected multiple-choice questions designed to strengthen conceptual understanding, improve accuracy, and enhance problem-solving speed. Our collection includes beginner, intermediate, and advanced-level questions frequently asked in JKSSB, SSC, Banking, Railway, Police, Defence, State PSC, and various national-level examinations. Every question is structured to reflect real exam patterns and helps candidates become familiar with objective-type assessment formats. Instant answer verification enables students to identify mistakes immediately and learn the correct approach without wasting valuable preparation time. Regular practice of topic-wise MCQs improves retention, reinforces key concepts, and develops confidence required to perform well under exam pressure. Whether you are revising important concepts, preparing for an upcoming recruitment test, or strengthening weak areas, these practice questions provide a reliable platform for continuous improvement. Consistent participation in MCQ-based learning sessions can significantly increase your chances of achieving higher scores and better ranks in competitive examinations.

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