In this article, we will cover Class 9 Biology MCQs based on the NCERT syllabus. This section includes key topics such as The Fundamental Unit of Life, Tissues, and Improvement in Food Resources. These MCQs will help students understand key concepts better, think critically, and prepare well for their exams.
1. What is the structural and functional unit of life?
a) Atom
b) Tissue
c) Cell
d) Molecule
View Answer
Explanation: The cell is considered the fundamental unit of life, as it carries out all the necessary functions of an organism, including growth, metabolism, and reproduction.
2. Which of the following is not a unicellular organism?
a) Hydra
b) Amoeba
c) Paramecium
d) Euglena
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Explanation: Hydra is a multicellular organism. Amoeba, Paramecium, and Euglena are examples of unicellular organisms that consist of just one cell.
3. What is an example of a prokaryotic cell?
a) Protozoa
b) Fungi
c) Plant cell
d) Bacteria
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Explanation: Bacteria are prokaryotes, which means they lack a true nucleus and membrane-bound organelles, unlike eukaryotic cells like those of fungi, plants, and protozoa.
4. Which part of the cell controls all its activities?
a) Cytoplasm
b) Nucleus
c) Plasma membrane
d) Mitochondria
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Explanation: The nucleus is the control center of the cell, containing the cell’s genetic material (DNA), which directs all cellular functions and activities.
5. What is the size range of prokaryotic cells?
a) 5–20 µm
b) 20–50 µm
c) 50–100 µm
d) 0.1–5 µm
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Explanation: Prokaryotic cells are generally smaller than eukaryotic cells, with sizes ranging from 0.1 to 5 micrometers, allowing for faster reproduction and adaptation.
6. Which organelle is responsible for photosynthesis in plants?
a) Mitochondria
b) Ribosome
c) Chloroplast
d) Lysosome
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Explanation: Chloroplasts contain chlorophyll, which captures light energy from the sun, allowing plants to perform photosynthesis and convert it into chemical energy.
7. Which organelle is known as the powerhouse of the cell?
a) Golgi apparatus
b) Mitochondria
c) Ribosome
d) Nucleus
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Explanation: Mitochondria are known as the powerhouse of the cell because they produce energy in the form of ATP, which fuels various cellular activities.
8. Which of these is a semi-permeable structure?
a) Cell wall
b) Ribosome
c) Cytoplasm
d) Plasma membrane
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Explanation: The plasma membrane is semi-permeable, meaning it allows certain substances to enter or leave the cell while blocking others, thus maintaining the cell’s internal environment.
9. What is the main component of the cell wall in plants?
a) Lipid
b) Starch
c) Cellulose
d) Protein
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Explanation: The cell wall in plant cells is primarily made of cellulose, a carbohydrate that provides structural support and protection to the cell.
10. What are chromatin fibers made of?
a) DNA and proteins
b) RNA and proteins
c) Lipids and carbohydrates
d) DNA and lipids
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Explanation: Chromatin consists of DNA wrapped around proteins called histones. This complex material makes up chromosomes, which carry the cell’s genetic information.
11. Which of the following is found only in animal cells?
a) Cell wall
b) Centrioles
c) Large central vacuole
d) Chloroplasts
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Explanation: Centrioles are involved in organizing the microtubules during cell division in animal cells. These structures are absent in plant cells.
12. What is the primary function of the Golgi apparatus?
a) Cellular respiration
b) Photosynthesis
c) Protein synthesis
d) Packaging and transport of materials
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Explanation: The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids for transport within or outside the cell. It is key in secretion and vesicle formation.
13. Which of the following is a characteristic of meristematic tissue?
a) Thick secondary walls
b) Large vacuoles
c) Actively dividing cells
d) Dead cells
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Explanation: Meristematic tissue consists of cells that are actively dividing, contributing to plant growth and the formation of new tissues.
14. Which of the following is not a simple permanent tissue?
a) Xylem
b) Parenchyma
c) Collenchyma
d) Sclerenchyma
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Explanation: Xylem is a complex permanent tissue because it is made up of different types of cells such as vessels, tracheids, and parenchyma. The others are simple tissues made of one type of cell.
15. Which of the following is a dead tissue?
a) Parenchyma
b) Sclerenchyma
c) Collenchyma
d) Phloem
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Explanation: Sclerenchyma tissue is composed of dead cells with thickened lignified walls, providing structural support to plants.
16. Which epithelial tissue is found in the lining of blood vessels?
a) Stratified squamous
b) Simple squamous
c) Cuboidal
d) Columnar
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Explanation: Simple squamous epithelium, consisting of a single layer of flat cells, lines blood vessels and facilitates diffusion of gases and nutrients.
17. Which muscle tissue is involuntary and striated?
a) Cardiac muscle
b) Skeletal muscle
c) Smooth muscle
d) None of the mentioned
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Explanation: Cardiac muscle is involuntary and striated, found only in the heart. It is responsible for pumping blood.
18. Which type of nervous tissue cell transmits signals?
a) Fibroblasts
b) Osteocytes
c) Neurons
d) Chondrocytes
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Explanation: Neurons are specialized cells that transmit electrical signals in the nervous system, allowing for communication throughout the body.
19. What is the main function of stomata?
a) Mechanical support
b) Gaseous exchange and transpiration
c) Photosynthesis
d) Transport food
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Explanation: Stomata are pores on the surface of leaves that allow the exchange of gases (oxygen and carbon dioxide) and regulate water loss through transpiration.
20. What is the function of phloem fibers?
a) Transport of food
b) Transport of water
c) Storage of food
d) Providing mechanical strength
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Explanation: Phloem fibers are specialized for mechanical support in plants, aiding in the structural strength of the phloem tissue.
21. Which connective tissue joins muscles to bones?
a) Ligaments
b) Tendons
c) Adipose tissue
d) Cartilage
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Explanation: Tendons are dense connective tissues that connect muscles to bones, allowing for movement and force transmission.
22. Which of the following is a component of xylem?
a) Companion cells
b) Sieve tubes
c) Vessel elements
d) Guard cells
View Answer
Explanation: Xylem is composed of vessel elements, tracheids, parenchyma, and fibers, which work together to transport water and minerals in plants.
23. Which of the following is a permanent tissue?
a) Intercalary meristem
b) Parenchyma
c) Apical meristem
d) Lateral meristem
View Answer
Explanation: Parenchyma is a simple permanent tissue that performs various functions such as storage, photosynthesis, and gas exchange in plants. It is found in leaves, stems, and roots.
24. Which connective tissue stores minerals like calcium and phosphorus?
a) Cartilage
b) Areolar tissue
c) Blood
d) Bone
View Answer
Explanation: Bone tissue stores minerals, primarily calcium and phosphorus, which are essential for bone strength and overall skeletal health. It also provides structural support to the body.
25. What is the main function of adipose tissue?
a) Transport of oxygen
b) Providing flexibility
c) Storage of fat
d) Connecting tissues
View Answer
Explanation: Adipose tissue stores fat, providing insulation and energy reserves for the body, as well as cushioning for organs.
26. What differentiates xylem and phloem?
a) Xylem transports food, phloem transports water
b) Xylem transports water, phloem transports food
c) Both transport water only
d) Both transport food only
View Answer
Explanation: Xylem is responsible for transporting water and minerals from the roots to the rest of the plant, while phloem transports the food produced during photosynthesis from the leaves to other parts of the plant.
27. Which tissue prevents water loss from the plant surface?
a) Phloem
b) Xylem
c) Epidermis with cuticle
d) Collenchyma
View Answer
Explanation: The epidermis, covered with a waxy cuticle, helps reduce water loss from plant surfaces by acting as a barrier to evaporation.
28. Which type of epithelial tissue is found in the kidney tubules?
a) Stratified squamous
b) Cuboidal
c) Simple squamous
d) Columnar
View Answer
Explanation: Cuboidal epithelium is found in the kidney tubules and plays an important role in secretion and absorption processes in the kidney.
29. Which type of crop is grown during the rainy season?
a) Kharif
b) Zaid
c) Rabi
d) All of the mentioned
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Explanation: Kharif crops, such as paddy (rice) and maize, are grown during the rainy season, taking advantage of the monsoon rains.
30. Which farming practice helps conserve soil moisture?
a) Irrigation
b) Ploughing
c) Crop rotation
d) Mulching
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Explanation: Mulching is a technique where the soil is covered with organic materials like straw or leaves to retain moisture, reduce evaporation, and protect the soil.
31. Which irrigation method is best for water conservation?
a) Tank irrigation
b) Sprinkler irrigation
c) Drip irrigation
d) Canal irrigation
View Answer
Explanation: Drip irrigation delivers water directly to the plant roots, minimizing water wastage and ensuring efficient use of water resources.
32. What is green manure?
a) Growing plants plowed back into the soil
b) Decomposed organic matter
c) Chemical fertilizers
d) Animal excreta
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Explanation: Green manure involves growing plants such as legumes and then plowing them back into the soil to improve its fertility by adding organic matter and nutrients.
33. Which of these is an example of biofertilizer?
a) Urea
b) DAP
c) Rhizobium
d) Ammonium nitrate
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Explanation: Rhizobium is a biofertilizer that fixes nitrogen in leguminous plants, enhancing soil fertility naturally without the need for chemical fertilizers.
34. Which of the following is a high-yielding breed of cow?
a) Gir
b) Ongole
c) Red Sindhi
d) Jersey
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Explanation: Jersey cows are known for their high milk yield, particularly rich in butterfat. They are often used in dairy farming for their ability to produce large quantities of milk with a high fat content, making them ideal for dairy product production.
35. What is the process of improving the genetic quality of livestock called?
a) Shearing
b) Crossbreeding
c) Vaccination
d) Breeding
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Explanation: Crossbreeding involves mating two different breeds to combine the best traits of both, such as disease resistance, improved milk yield, or better growth rate. It is used to improve the genetic quality of livestock and make them more suitable for specific farming conditions.
36. Which disease is caused by a deficiency of vitamin D in cattle?
a) Brucellosis
b) Mastitis
c) Rickets
d) Anthrax
View Answer
Explanation: Rickets is a disease caused by a deficiency of vitamin D, which leads to weak bones and skeletal deformities in cattle. It is commonly seen in young animals who do not get enough exposure to sunlight or vitamin D supplementation.
37. Which of the following is an organic manure?
a) Ammonium nitrate
b) Urea
c) Potash
d) Compost
View Answer
Explanation: Compost is a natural organic manure made by decomposing plant and animal matter. It is rich in nutrients and improves soil structure, making it a more sustainable and eco-friendly alternative to chemical fertilizers.
38. Why is manure preferred over chemical fertilizers?
a) It is eco-friendly and improves soil texture
b) It acts faster than fertilizers
c) It only provides potassium
d) It is cheaper
View Answer
Explanation: Manure is preferred because it improves soil texture, enhances microbial activity, and provides essential nutrients to the soil in a natural form. It also helps retain soil moisture and reduces the risk of pollution that can be caused by chemical fertilizers.
39. Which crop benefits significantly from drip irrigation?
a) Sugarcane
b) Rice
c) Grapes
d) Cotton
View Answer
Explanation: Drip irrigation is especially beneficial for crops like grapes, which are sensitive to water stress, as it delivers water directly to the roots efficiently.
40. Which fodder crop is commonly fed to livestock?
a) Cotton
b) Maize
c) Rice
d) Alfalfa
View Answer
Explanation: Alfalfa is a nutritious fodder crop commonly fed to livestock, known for its high protein content.
41. In pisciculture, which of the following species is commonly cultivated?
a) Sheep
b) Goat
c) Rohu
d) Cow
View Answer
Explanation: Rohu is a commonly farmed fish in pisciculture, known for its fast growth and high market value.
42. What is vermicomposting?
a) Composting using fungi
b) Composting using earthworms
c) Composting using bacteria
d) Composting using fish waste
View Answer
Explanation: Vermicomposting involves using earthworms to break down organic material, turning it into nutrient-rich compost for agriculture.
43. Which practice prevents soil erosion in hilly areas?
a) Mulching
b) Terrace farming
c) Monocropping
d) Flood irrigation
View Answer
Explanation: Terrace farming helps prevent soil erosion on hilly terrain by reducing water runoff and increasing water absorption, thereby protecting the soil.
Explore Class 9 Biology MCQs Chapter-wise
Explore more MCQs chapter-wise below and test your understanding of each topic in greater detail:
- The Fundamental Unit of Life MCQ
- Tissues MCQ
- Improvement in Food Resources MCQ
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Frequently Asked Questions (FAQs) About Class 9 Biology MCQs
Q1. What are the key topics in Class 9 Biology?
The key topics in Class 9 Biology include Diversity in Living Organisms, Cells and Tissues, Human Body and its Systems, Natural Resources, and Health and Diseases.
Q2. How can I prepare for Class 9 Biology exams?
To prepare for Class 9 Biology exams, understand the concepts thoroughly, practice MCQs, revise important diagrams and processes, and refer to NCERT books for detailed explanations.
Q3. Why should I practice Class 9 Biology MCQs?
Practicing Class 9 Biology MCQs helps you understand the topics better, manage your time well, build confidence, find weak areas, and prepare for exams like NTSE and Olympiads.
Q4. Are these MCQs based on the NCERT syllabus?
Yes, the MCQs are designed in alignment with the NCERT syllabus to help students prepare for exams effectively.
Q5. What are some effective strategies for solving MCQs?
Read the question carefully, eliminate obviously wrong options, and if unsure, make a guess based on your knowledge.
