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.361 Which part of the human eye is transplanted during 'Corneal Transplantation'
A Lens
B Retina
C Cornea
D Iris
Discuss / Board
Q.362 Identify the incorrect statement regarding 'Enzymes'
A They are proteinaceous in nature
B They are consumed during the chemical reaction
C They lower the activation energy of the reaction
D They are temperature and pH sensitive
Discuss / Board
Q.363 The process by which DNA creates an RNA copy is known as
A Replication
B Transcription
C Translation
D Reverse Transcription
Discuss / Board
Q.364 Which of the following is a symptom of 'Sickle Cell Anemia'
A Excessive bleeding from small cuts
B Abnormal hemoglobin causing crescent-shaped RBCs
C High white blood cell count
D Failure of liver function
Discuss / Board
Q.365 The human 'Tailbone' is scientifically known as the
A Sacrum
B Coccyx
C Femur
D Tibia
Discuss / Board
Q.366 Which endocrine gland is active in childhood but shrinks significantly after puberty
A Thyroid gland
B Thymus gland
C Adrenal gland
D Pituitary gland
Discuss / Board
Q.367 Which of the following is the 'Universal Recipient' blood group
A O Positive
B AB Positive
C O Negative
D AB Negative
Discuss / Board
Q.368 In the process of 'Glycolysis' one molecule of glucose is broken down into
A Two molecules of Ethanol
B Two molecules of Pyruvate
C One molecule of Lactic acid
D Six molecules of CO2
Discuss / Board
Q.369 The primary component of 'Honey' is which type of sugar
A Sucrose
B Maltose
C Fructose
D Galactose
Discuss / Board
Q.370 The 'Montreal Protocol' signed in 1987 is primarily related to
A Global Warming
B Ozone layer depletion
C Biodiversity conservation
D Wetlands protection
Discuss / Board
Q.371 The genetic condition 'Down Syndrome' is characterized by the presence of an extra copy of which chromosome
A Chromosome 18
B Chromosome 21
C Chromosome 13
D X Chromosome
Discuss / Board
Q.372 In a food chain what is the role of 'Decomposers'
A To convert light energy into chemical energy
B To recycle nutrients by breaking down organic matter
C To provide energy to the primary consumers
D To regulate the population of top predators
Discuss / Board
Q.373 Which of the following is a 'Water Soluble' vitamin
A Vitamin A
B Vitamin D
C Vitamin C
D Vitamin E
Discuss / Board
Q.374 The 'Resting Membrane Potential' of a neuron is primarily maintained by the
A Sodium-Potassium Pump
B Calcium channels
C Neurotransmitters in the synapse
D Myelin sheath
Discuss / Board
Q.375 The 'Lock and Key' hypothesis of enzyme action was proposed by
A Daniel Koshland
B Emil Fischer
C Robert Brown
D Louis Pasteur
Discuss / Board
Q.376 Which of the following is an example of 'Ex-situ' conservation of biodiversity
A National Parks
B Wildlife Sanctuaries
C Seed Banks
D Biosphere Reserves
Discuss / Board
Q.377 Which hormone is commonly used to induce 'Parthenocarpy' or seedless fruit production
A Auxins
B Gibberellins
C Ethylene
D Abscisic Acid
Discuss / Board
Q.378 The 'Bohr Effect' explains how hemoglobin's affinity for oxygen is reduced by
A High blood pH
B Decreased CO2 levels
C Increase in acidity or CO2 concentration
D Decreased temperature
Discuss / Board
Q.379 Which among the following is the 'Structural unit' of a Muscle Fiber
A Myofibril
B Sarcomere
C Sarcolemma
D Fascicle
Discuss / Board
Q.380 In the human eye 'Night Blindness' is caused by the deficiency of which light-sensitive pigment
A Iodopsin
B Rhodopsin
C Melatonin
D Hemoglobin
Discuss / Board
Q.381 The 'Poliomyelitis' virus primarily attacks which system of the human body
A Respiratory system
B Digestive system
C Nervous system
D Excretory system
Discuss / Board
Q.382 What is the function of the 'Casparian Strip' in plant roots
A To increase water absorption area
B To force water and minerals to enter the vascular cylinder through the protoplast
C To store starch for the plant
D To allow for gaseous exchange
Discuss / Board
Q.383 Which enzyme in the human saliva is responsible for the hydrolysis of starch into maltose
A Pepsin
B Lipase
C Salivary Amylase
D Trypsin
Discuss / Board
Q.384 Statement I Mitosis results in two identical daughter cells Statement II Meiosis results in four haploid genetically diverse daughter cells
A Only I is correct
B Only II is correct
C Both are correct
D Neither is correct
Discuss / Board
Q.385 Which of the following is known as the 'Graveyard of RBCs'
A Liver
B Spleen
C Kidney
D Bone Marrow
Discuss / Board
Q.386 The conversion of Nitrate to atmospheric Nitrogen by bacteria is called
A Nitrification
B Denitrification
C Ammonification
D Nitrogen Fixation
Discuss / Board
Q.387 A person with 'Hypermetropia' cannot see nearby objects clearly because the image is formed
A In front of the retina
B Behind the retina
C Exactly on the blind spot
D On the optic nerve
Discuss / Board
Q.388 Which among the following hormones is called the 'Emergency Hormone'
A Insulin
B Thyroxine
C Adrenaline
D Estrogen
Discuss / Board
Q.389 The 'U-shaped' part of the nephron that plays a role in water conservation is
A Proximal tubule
B Loop of Henle
C Collecting duct
D Glomerulus
Discuss / Board
Q.390 Identify the vector for the disease 'Yellow Fever'
A Anopheles mosquito
B Aedes aegypti
C Culex mosquito
D Tsetse fly
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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