Biology is the science of life — from the tiniest cell to the most complex human systems. This category is designed to support school students (Classes 6–12) as well as undergraduate (UG) learners with clear explanations, exam-focused content, and concept-building resources. You’ll find:
Concept-wise explanations aligned with NCERT and common UG syllabi
Important questions & answers for school exams, NEET foundation, and college tests
Human physiology, genetics, ecology, biotechnology, and cell biology explained simply
Practice questions, MCQs, and revision notes to strengthen understanding
Doubt-solving and conceptual clarity for competitive and academic success
Whether you’re preparing for school exams , building a strong base for NEET , or studying Biology at the undergraduate level , this section helps you learn smarter, revise faster, and understand Biology deeply — not just memorize it.
Learn life sciences the right way — clear concepts, exam relevance, and real understanding.
Q. Which part of the plant is primarily responsible for nutrient transport?
A.
Xylem
B.
Phloem
C.
Cortex
D.
Pith
Show solution
Solution
Phloem is responsible for the transport of nutrients and sugars throughout the plant.
Correct Answer:
B
— Phloem
Learn More →
Q. Which part of the plant is primarily responsible for photosynthesis and gas exchange?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
Show solution
Solution
Leaves are the main sites for photosynthesis and gas exchange due to their structure and presence of stomata.
Correct Answer:
C
— Leaves
Learn More →
Q. Which part of the plant is primarily responsible for photosynthesis?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
Show solution
Solution
Leaves contain chlorophyll and are the main site of photosynthesis in plants.
Correct Answer:
C
— Leaves
Learn More →
Q. Which part of the plant is primarily responsible for the absorption of water and nutrients?
A.
Stem
B.
Leaf
C.
Root
D.
Flower
Show solution
Solution
The root system is responsible for the absorption of water and nutrients from the soil.
Correct Answer:
C
— Root
Learn More →
Q. Which part of the plant is primarily responsible for the production of medicinal alkaloids?
A.
Roots
B.
Leaves
C.
Flowers
D.
Bark
Show solution
Solution
Leaves are often the primary site for the synthesis of many medicinal alkaloids.
Correct Answer:
B
— Leaves
Learn More →
Q. Which part of the plant is primarily responsible for water absorption?
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
Show solution
Solution
Roots are primarily responsible for water absorption and nutrient uptake from the soil.
Correct Answer:
C
— Roots
Learn More →
Q. Which part of the plant is primarily responsible for water and nutrient uptake?
A.
Stem
B.
Leaf
C.
Root
D.
Flower
Show solution
Solution
Roots are specialized for absorbing water and nutrients from the soil.
Correct Answer:
C
— Root
Learn More →
Q. Which part of the respiratory system is responsible for the actual exchange of gases?
A.
Bronchi
B.
Alveoli
C.
Trachea
D.
Larynx
Show solution
Solution
The alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.
Correct Answer:
B
— Alveoli
Learn More →
Q. Which pathogen is known for causing a severe form of gastroenteritis, particularly in children?
A.
Norovirus
B.
Clostridium difficile
C.
Salmonella enterica
D.
Escherichia coli O157:H7
Show solution
Solution
Norovirus is a leading cause of gastroenteritis outbreaks, especially in children, due to its high transmissibility and low infectious dose.
Correct Answer:
A
— Norovirus
Learn More →
Q. Which pathogen is known for causing foodborne illness through contaminated poultry?
A.
Salmonella
B.
Listeria
C.
E. coli
D.
Clostridium botulinum
Show solution
Solution
Salmonella is a common cause of foodborne illness, often associated with undercooked poultry.
Correct Answer:
A
— Salmonella
Learn More →
Q. Which pathogen is known for causing the most severe form of viral gastroenteritis in children?
A.
Rotavirus
B.
Norovirus
C.
Adenovirus
D.
Enterovirus
Show solution
Solution
Rotavirus is the leading cause of severe viral gastroenteritis in children, leading to dehydration and hospitalization.
Correct Answer:
A
— Rotavirus
Learn More →
Q. Which pathogen is known to cause cholera?
A.
Vibrio cholerae
B.
Salmonella enterica
C.
Clostridium botulinum
D.
Listeria monocytogenes
Show solution
Solution
Vibrio cholerae is the bacterium that causes cholera, leading to severe diarrhea and dehydration.
Correct Answer:
A
— Vibrio cholerae
Learn More →
Q. Which pathogen is known to cause the disease known as 'flesh-eating disease'?
A.
Clostridium perfringens
B.
Streptococcus pyogenes
C.
Vibrio cholerae
D.
Listeria monocytogenes
Show solution
Solution
Streptococcus pyogenes is associated with necrotizing fasciitis, commonly referred to as 'flesh-eating disease'.
Correct Answer:
B
— Streptococcus pyogenes
Learn More →
Q. Which phase of the menstrual cycle is characterized by the thickening of the endometrium?
A.
Follicular phase
B.
Ovulation
C.
Luteal phase
D.
Menstrual phase
Show solution
Solution
The follicular phase is characterized by the thickening of the endometrium in preparation for potential implantation.
Correct Answer:
A
— Follicular phase
Learn More →
Q. Which phase of the menstrual cycle is characterized by the thickening of the uterine lining?
A.
Follicular phase
B.
Ovulation phase
C.
Luteal phase
D.
Menstrual phase
Show solution
Solution
The luteal phase is characterized by the thickening of the uterine lining in preparation for potential implantation.
Correct Answer:
C
— Luteal phase
Learn More →
Q. Which phase of the plant life cycle is characterized by the formation of gametes?
A.
Sporophyte
B.
Gametophyte
C.
Seedling
D.
Mature plant
Show solution
Solution
The gametophyte phase is where gametes are produced in the plant life cycle.
Correct Answer:
B
— Gametophyte
Learn More →
Q. Which phase of the plant life cycle is characterized by the production of gametes?
A.
Sporophyte phase
B.
Gametophyte phase
C.
Seed phase
D.
Mature phase
Show solution
Solution
The gametophyte phase is where gametes are produced in the plant life cycle.
Correct Answer:
B
— Gametophyte phase
Learn More →
Q. Which phase of the plant life cycle is haploid?
A.
Sporophyte
B.
Gametophyte
C.
Zygote
D.
Seedling
Show solution
Solution
The gametophyte phase is haploid, producing gametes for fertilization.
Correct Answer:
B
— Gametophyte
Learn More →
Q. Which phytochemical found in cruciferous vegetables is linked to cancer prevention?
A.
Glucosinolates
B.
Carotenoids
C.
Polyphenols
D.
Terpenes
Show solution
Solution
Glucosinolates, found in cruciferous vegetables like broccoli, are associated with cancer prevention.
Correct Answer:
A
— Glucosinolates
Learn More →
Q. Which phytochemical is known for its potential anti-cancer properties and is found in cruciferous vegetables?
A.
Glucosinolates
B.
Carotenoids
C.
Polyphenols
D.
Flavonoids
Show solution
Solution
Glucosinolates, found in cruciferous vegetables like broccoli, have been studied for their anti-cancer effects.
Correct Answer:
A
— Glucosinolates
Learn More →
Q. Which phytochemical is known for its potential anti-cancer properties?
A.
Resveratrol
B.
Chlorophyll
C.
Starch
D.
Cellulose
Show solution
Solution
Resveratrol, found in grapes and berries, has been studied for its anti-cancer effects.
Correct Answer:
A
— Resveratrol
Learn More →
Q. Which phytochemical is known for its role in cancer prevention?
A.
Carotenoids
B.
Starch
C.
Proteins
D.
Lipids
Show solution
Solution
Carotenoids, found in colorful fruits and vegetables, are linked to cancer prevention.
Correct Answer:
A
— Carotenoids
Learn More →
Q. Which phytochemical is primarily responsible for the cancer-fighting properties of tomatoes?
A.
Lycopene
B.
Quercetin
C.
Resveratrol
D.
Catechins
Show solution
Solution
Lycopene, found in tomatoes, is recognized for its potential cancer-fighting properties.
Correct Answer:
A
— Lycopene
Learn More →
Q. Which phytochemical is responsible for the anti-cancer properties of cruciferous vegetables?
A.
Glucosinolates
B.
Alkaloids
C.
Terpenes
D.
Saponins
Show solution
Solution
Glucosinolates found in cruciferous vegetables are linked to cancer prevention.
Correct Answer:
A
— Glucosinolates
Learn More →
Q. Which phytochemical is responsible for the color of many fruits and vegetables and has health benefits?
A.
Chlorophyll
B.
Carotenoids
C.
Starch
D.
Cellulose
Show solution
Solution
Carotenoids are responsible for the vibrant colors in fruits and vegetables and have antioxidant properties.
Correct Answer:
B
— Carotenoids
Learn More →
Q. Which phytochemical is responsible for the red color in tomatoes and has health benefits?
A.
Lycopene
B.
Carotene
C.
Chlorophyll
D.
Flavonoids
Show solution
Solution
Lycopene is the phytochemical that gives tomatoes their red color and is linked to various health benefits.
Correct Answer:
A
— Lycopene
Learn More →
Q. Which pigment is primarily responsible for capturing light energy during photosynthesis?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Chlorophyll b
Show solution
Solution
Chlorophyll a is the main pigment that captures light energy for photosynthesis.
Correct Answer:
A
— Chlorophyll a
Learn More →
Q. Which pigment is primarily responsible for capturing light energy during the light reactions?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Chlorophyll b
Show solution
Solution
Chlorophyll a is the main pigment that captures light energy for photosynthesis.
Correct Answer:
A
— Chlorophyll a
Learn More →
Q. Which pigment is primarily responsible for capturing light energy in plants?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Chlorophyll b
Show solution
Solution
Chlorophyll a is the primary pigment that captures light energy for photosynthesis.
Correct Answer:
A
— Chlorophyll a
Learn More →
Q. Which plant cell type is primarily involved in storage and metabolism?
A.
Parenchyma
B.
Collenchyma
C.
Sclerenchyma
D.
Xylem
Show solution
Solution
Parenchyma cells are versatile and primarily involved in storage, metabolism, and tissue repair in plants.
Correct Answer:
A
— Parenchyma
Learn More →
Showing 1441 to 1470 of 1731 (58 Pages)