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.181 Interspecific interaction between two species, in which both members benefit, is referred to as:
A neutralism
B commensalism
C mutualism
D uniquely
Discuss / Board
Q.182 Which of the following is generally NOT considered an essential macronutrient for most terrestrial plants?
A Calcium
B Potassium
C Magnesium
D Sodium
Discuss / Board
Q.183 Who is famous for discovering the random movement of microscopic particles in a fluid, now known as Brownian motion?
A Watson
B Robert Brown
C Anton van Leeuwenhoek
D Robert Hook
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Q.184 Milk is a notoriously poor source of which vitamin?
A A
B C
C B
D D
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Q.185 Who used a home-made microscope to discover the invisible world of microbes, for which he is called the founding father of microbiology?
A Antoni van Leeuwenhoek
B Matthias Schleiden
C Rudolf Virchow
D Robert Brown
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Q.186 Which of the following cellular structures is primarily responsible for protein synthesis?
A Ribosomes
B Golgi apparatus
C Cell membrane
D Nucleus
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Q.187 Which of the following statements about animal hearts is INCORRECT?
A Crocodiles have four heart chambers.
B Birds have four-chambered heart.
C Fishes have two chambered heart.
D Frogs have four-chambered heart.
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Q.188 Which of the following describes centrioles?
A a heterogeneous family of organelles found ubiquitously in plant cells
B a membrane-bound cell organelle that contains digestive enzymes
C a paired barrel-shaped organelle located in the cytoplasm of animal cells near the nuclear envelope
D a stack of small flat sacs formed by membranes inside the cell's cytoplasm
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Q.189 Which of the below is a psychological disorder of refusal to eat food, caused by a distorted perception of weight?
A Bulimia Nervosa
B Anorexia Nervosa
C Marasmus
D Kwashiorkor
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Q.190 Choose the INCORRECT statement about lichens.
A Fungi and cyanobacteria both lives in lichens independently.
B Lichens contains cyanobacteria.
C Lichens are seen slow-growing large coloured patches on the bark of trees.
D Fungi are found in lichen living a symbiotic life.
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Q.191 Identify the type of specialised cells found in flatworms that help in osmoregulation.
A Stem cells
B Mesoderm
C Sperm cells
D Flame cells
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Q.192 Identify another name of Choanocytes.
A Flame cells
B Sperm cells
C Stem cells
D Collar cells
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Q.193 Which of the following is a metabolic disease characterized by elevated blood sugar levels?
A Hypertension
B Asthma
C Arthritis
D Diabetes
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Q.194 It is a fact that if you drink from a plastic bottle and throw it in the dustbin, it will still be there when your grandchildren are old. What is the reason behind this?
A Plastics are biodegradable.
B Plastics are radioactive.
C Plastics are non-biodegradable.
D Plastics are heavy metals.
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Q.195 In plant cells, which organelle is responsible for photosynthesis?
A Chloroplast
B Mitochondrion
C Lysosome
D Peroxisome
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Q.196 What is the term for the process of water loss from plant leaves through tiny openings called stomata?
A Transpiration
B Respiration
C Photosynthesis
D Germination
Discuss / Board
Q.197 Which of the following deficiencies is a leading cause of anemia?
A Iron deficiency
B Magnesium deficiency
C Calcium deficiency
D Selenium deficiency
Discuss / Board
Q.198 Which of the following is the structural and functional unit of an organism?
A Cell
B ATP
C Nucleus
D Mitochondria
Discuss / Board
Q.199 What is the primary function of carbohydrates in the body?
A To enhance vision
B To regulate metabolism
C To build muscle
D To provide energy
Discuss / Board
Q.200 Which group of beneficial bacteria is commonly used in fermented dairy products?
A Streptomyces rhizobium
B Campylobacter jejuni
C Lactobacillus acidophilus
D Staphylococcus aureus
Discuss / Board
Q.201 Which cell organelle is the energy factory of cells and is an important hub for intracellular organelles?
A Golgi apparatus
B Lysosomes
C Mitochondria
D Peroxisomes
Discuss / Board
Q.202 Which organelle is responsible for producing ATP, the cell's energy currency?
A Nucleus
B Mitochondrion
C Golgi apparatus
D Endoplasmic reticulum
Discuss / Board
Q.203 Which of the following represents the correct sequence of the upper digestive tract?
A Windpipe --> Food pipe
B Mouth --> Rectum
C Oesophagus --> Stomach
D Stomach --> Rectum
Discuss / Board
Q.204 Which part of the cell is responsible for generating the primary energy molecule ATP in eukaryotic animals?
A Mitochondria
B Vacuoles
C Endoplasmic reticulum
D Cell wall
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Q.205 The type of carbohydrate predominantly found in potatoes is .
A Sugar
B Glucose
C Starch
D Fructose
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Q.206 Food rich in carbohydrates (like potatoes) and those rich in fats (like butter) are also known as .
A Energy-Giving Food
B Main Course
C Unsafe Food
D Fast Food
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Q.207 On cold pressing groundnut, oils are released. This indicates the presence of .
A Carbohydrates
B Fats
C Vitamins
D Proteins
Discuss / Board
Q.208 Which of the following is a bone disease caused by a severe deficiency of vitamin D, calcium, or phosphate?
A Rickets
B Pertussis
C Dementia
D Polio
Discuss / Board
Q.209 Which of the following organelles contains digestive enzymes to break down waste materials and cellular debris?
A Nucleus
B Mitochondrion
C Lysosome
D Vacuole
Discuss / Board
Q.210 Which of the following demineralises the enamel of the teeth?
A Acids produced by bacteria
B Saliva
C Toothpaste
D Soft toothbrush
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

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