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 of the following microbes is used in the production of vinegar?
A.
Lactobacillus
B.
Acetobacter
C.
Bacillus
D.
Clostridium
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Solution
Acetobacter is a genus of bacteria that converts ethanol into acetic acid, the main component of vinegar.
Correct Answer:
B
— Acetobacter
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Q. Which of the following microorganisms is known to cause tuberculosis?
A.
Streptococcus pneumoniae
B.
Mycobacterium tuberculosis
C.
Escherichia coli
D.
Staphylococcus aureus
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Solution
Mycobacterium tuberculosis is the causative agent of tuberculosis, a serious infectious disease that primarily affects the lungs.
Correct Answer:
B
— Mycobacterium tuberculosis
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Q. Which of the following microorganisms is primarily responsible for causing tuberculosis?
A.
Streptococcus pneumoniae
B.
Mycobacterium tuberculosis
C.
Escherichia coli
D.
Staphylococcus aureus
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Solution
Mycobacterium tuberculosis is the causative agent of tuberculosis, a serious infectious disease that primarily affects the lungs.
Correct Answer:
B
— Mycobacterium tuberculosis
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Q. Which of the following mutations does NOT change the amino acid sequence?
A.
Missense mutation
B.
Nonsense mutation
C.
Silent mutation
D.
Frameshift mutation
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Solution
A silent mutation does not change the amino acid sequence due to the redundancy of the genetic code.
Correct Answer:
C
— Silent mutation
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Q. Which of the following mutations involves a change in a single nucleotide?
A.
Frameshift mutation
B.
Point mutation
C.
Deletion mutation
D.
Duplication mutation
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Solution
A point mutation involves a change in a single nucleotide, which can lead to a different amino acid being incorporated into a protein.
Correct Answer:
B
— Point mutation
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Q. Which of the following mutations is a change in a single nucleotide?
A.
Frameshift mutation
B.
Point mutation
C.
Deletion mutation
D.
Duplication mutation
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Solution
A point mutation is a change in a single nucleotide in the DNA sequence.
Correct Answer:
B
— Point mutation
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Q. Which of the following mutations is likely to have the most severe effect on a protein?
A.
Silent mutation
B.
Missense mutation
C.
Nonsense mutation
D.
Frameshift mutation
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Solution
Frameshift mutations can alter the reading frame of the genetic code, potentially leading to a completely nonfunctional protein.
Correct Answer:
D
— Frameshift mutation
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Q. Which of the following mutations is likely to have the most significant effect on a protein?
A.
Silent mutation
B.
Missense mutation
C.
Nonsense mutation
D.
In-frame mutation
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Solution
A nonsense mutation introduces a premature stop codon, leading to a truncated and often nonfunctional protein, which can have significant effects.
Correct Answer:
C
— Nonsense mutation
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Q. Which of the following mutations is likely to have the most significant impact on protein function?
A.
Silent mutation
B.
Missense mutation
C.
Nonsense mutation
D.
Frameshift mutation
Show solution
Solution
Frameshift mutations can alter the reading frame of the genetic code, potentially leading to completely different and nonfunctional proteins.
Correct Answer:
D
— Frameshift mutation
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Q. Which of the following mutations is most likely to result in a nonfunctional protein?
A.
Silent mutation
B.
Missense mutation
C.
Nonsense mutation
D.
Frameshift mutation
Show solution
Solution
A nonsense mutation introduces a premature stop codon, leading to a truncated and often nonfunctional protein.
Correct Answer:
C
— Nonsense mutation
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Q. Which of the following organisms is most resistant to sterilization methods?
A.
Escherichia coli
B.
Streptococcus pneumoniae
C.
Bacillus anthracis spores
D.
HIV
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Solution
Bacillus anthracis spores are highly resistant to sterilization methods, making them a significant concern in sterilization processes.
Correct Answer:
C
— Bacillus anthracis spores
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Q. Which of the following plant groups is characterized by having seeds that are not enclosed in an ovary?
A.
Angiosperms
B.
Gymnosperms
C.
Bryophytes
D.
Pteridophytes
Show solution
Solution
Gymnosperms are characterized by having seeds that are exposed or not enclosed within an ovary.
Correct Answer:
B
— Gymnosperms
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Q. Which of the following plant groups is characterized by the presence of seeds?
A.
Mosses
B.
Ferns
C.
Gymnosperms
D.
Liverworts
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Solution
Gymnosperms are characterized by the presence of seeds, which are often exposed on cones.
Correct Answer:
C
— Gymnosperms
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Q. Which of the following plant groups is characterized by the presence of vascular tissue?
A.
Bryophytes
B.
Pteridophytes
C.
Mosses
D.
Liverworts
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Solution
Pteridophytes, such as ferns, have vascular tissue, which allows for the transport of water and nutrients.
Correct Answer:
B
— Pteridophytes
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Q. Which of the following plant groups is known for having a dominant sporophyte generation?
A.
Mosses
B.
Ferns
C.
Liverworts
D.
Green algae
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Solution
Ferns have a dominant sporophyte generation, which is the leafy part of the plant that produces spores.
Correct Answer:
B
— Ferns
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Q. Which of the following plant groups is known for having a double fertilization process?
A.
Bryophytes
B.
Pteridophytes
C.
Gymnosperms
D.
Angiosperms
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Solution
Angiosperms undergo double fertilization, where one sperm fertilizes the egg and another forms the endosperm.
Correct Answer:
D
— Angiosperms
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Q. Which of the following plant groups is known for having true roots, stems, and leaves?
A.
Mosses
B.
Ferns
C.
Liverworts
D.
Algae
Show solution
Solution
Ferns are vascular plants that possess true roots, stems, and leaves, distinguishing them from non-vascular plants like mosses and liverworts.
Correct Answer:
B
— Ferns
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Q. Which of the following plant groups is known for having vascular tissue?
A.
Mosses
B.
Liverworts
C.
Ferns
D.
Algae
Show solution
Solution
Ferns are vascular plants, which means they have specialized tissues for transporting water and nutrients.
Correct Answer:
C
— Ferns
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Q. Which of the following plant groups is known for having vascular tissues?
A.
Mosses
B.
Liverworts
C.
Ferns
D.
Algae
Show solution
Solution
Ferns are known for having vascular tissues.
Correct Answer:
C
— Ferns
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Q. Which of the following plant groups is known for its ability to survive in extreme environments?
A.
Angiosperms
B.
Gymnosperms
C.
Bryophytes
D.
Xerophytes
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Solution
Xerophytes are specialized plants that can survive in extreme environments, such as deserts.
Correct Answer:
D
— Xerophytes
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Q. Which of the following plant groups is known for producing spores instead of seeds?
A.
Angiosperms
B.
Gymnosperms
C.
Ferns
D.
Cycads
Show solution
Solution
Ferns reproduce via spores, while angiosperms and gymnosperms reproduce via seeds.
Correct Answer:
C
— Ferns
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Q. Which of the following plant groups is primarily adapted to dry environments?
A.
Hydrophytes
B.
Xerophytes
C.
Mesophytes
D.
Halophytes
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Solution
Xerophytes are plants that have adapted to survive in dry environments, often featuring specialized structures to conserve water.
Correct Answer:
B
— Xerophytes
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Q. Which of the following plant groups is primarily aquatic?
A.
Mosses
B.
Liverworts
C.
Algae
D.
Ferns
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Solution
Algae are primarily aquatic and can be found in various water bodies, unlike the other groups listed.
Correct Answer:
C
— Algae
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Q. Which of the following plant groups is primarily non-vascular?
A.
Ferns
B.
Mosses
C.
Gymnosperms
D.
Angiosperms
Show solution
Solution
Mosses are non-vascular plants, meaning they lack specialized tissues for water and nutrient transport.
Correct Answer:
B
— Mosses
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Q. Which of the following plant hormones is primarily responsible for promoting cell elongation?
A.
Auxins
B.
Gibberellins
C.
Cytokinins
D.
Ethylene
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Solution
Gibberellins are known to promote cell elongation and are important for growth.
Correct Answer:
B
— Gibberellins
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Q. Which of the following plant structures is most directly involved in the process of evolution through adaptation?
A.
Roots
B.
Leaves
C.
Flowers
D.
Stems
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Solution
Flowers are directly involved in reproduction and can adapt to attract specific pollinators, influencing evolutionary outcomes.
Correct Answer:
C
— Flowers
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Q. Which of the following plant structures is primarily involved in gas exchange?
A.
Roots
B.
Stomata
C.
Xylem
D.
Phloem
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Solution
Stomata are small openings on the surfaces of leaves that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen.
Correct Answer:
B
— Stomata
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Q. Which of the following plant types is non-vascular?
A.
Ferns
B.
Mosses
C.
Conifers
D.
Flowering plants
Show solution
Solution
Mosses are non-vascular plants that do not have specialized tissues for water and nutrient transport.
Correct Answer:
B
— Mosses
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Q. Which of the following plants is known for its unique method of apomixis?
A.
Dandelion
B.
Oak tree
C.
Rose
D.
Cactus
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Solution
Dandelions can reproduce through apomixis, where seeds are produced without fertilization, resulting in offspring that are genetically identical to the parent.
Correct Answer:
A
— Dandelion
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Q. Which of the following plants primarily relies on wind for pollination?
A.
Roses
B.
Corn
C.
Orchids
D.
Daisies
Show solution
Solution
Corn is an example of a plant that relies on wind for pollination, as it produces lightweight pollen that can be easily carried by the wind.
Correct Answer:
B
— Corn
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