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chapter 6 biomolecules  Section A: Introduction to Biomolecules Biomolecules are a) Inorganic molecules b) Organic molecules in living organisms c) Artificial substances d) Minerals only Ans: b Which of the following is not a biomolecule? a) Carbohydrate b) Protein c) Plastic d) Lipid Ans: c The most abundant biomolecule in the cell is a) Protein b) Lipid c) Carbohydrate d) Nucleic acid Ans: a Which element is not commonly found in biomolecules? a) Carbon b) Hydrogen c) Nitrogen d) Mercury Ans: d Biomolecules are primarily made up of: a) Carbon, hydrogen, oxygen, nitrogen b) Carbon, silver, gold c) Hydrogen, helium, neon d) Sodium, chlorine, iodine Ans: a Section B: Carbohydrates The basic unit of carbohydrates is a) Amino acid b) Nucleotide c) Monosaccharide d) Fatty acid Ans: c Which is a monosaccharide? a) Glucose b) Sucrose c) Starch d) Cellulose Ans: a Sucrose is composed of a) Glucose + Galactose b) Glucose + Fr...

Class 9 Biology: Chapter 5 – Tissue, Organ, and Organ System (MCQs) Section A: Tissues Which of the following is a simple permanent tissue? a) Parenchyma b) Xylem c) Phloem d) Cambium Ans: a Collenchyma provides: a) Photosynthesis b) Storage c) Mechanical support d) Water conduction Ans: c Which of the following is a complex permanent tissue? a) Parenchyma b) Collenchyma c) Xylem d) Sclerenchyma Ans: c Which tissue helps in transport of water in plants? a) Phloem b) Parenchyma c) Xylem d) Collenchyma Ans: c Phloem helps in the transport of: a) Water b) Oxygen c) Food d) Minerals Ans: c Which type of tissue is responsible for photosynthesis? a) Parenchyma b) Collenchyma c) Chlorenchyma d) Sclerenchyma Ans: c Which meristem is responsible for increase in length of plant? a) Intercalary b) Apical c) Lateral d) Secondary Ans: b Intercalary meristem is found: a) At tip of roots b) Between mature tissues c) On sides of stem d) In ...

   100 MCQs on Chapter 4: The Cell Cycle for Class 9 Biology.  11. Which phase comes after G1 phase in interphase? A) Option1 B) Option2 C) S phase D) Option4 Answer: C) S phase 12. In which phase of mitosis does the nuclear envelope break down? A) Option1 B) Option2 C) Prophase D) Option4 Answer: C) Prophase 13. During which phase are sister chromatids separated? A) Option1 B) Option2 C) Anaphase D) Option4 Answer: C) Anaphase 14. What forms at the end of telophase in plant cells? A) Option1 B) Option2 C) Cell plate D) Option4 Answer: C) Cell plate 15. What structure forms the spindle fibers? A) Option1 B) Option2 C) Centrioles D) Option4 Answer: C) Centrioles 16. Which organelle is responsible for organizing spindle fibers? A) Option1 B) Option2 C) Centrosome D) Option4 Answer: C) Centrosome 17. In animal cells, cytokinesis occurs through the formation of a: A) Option1 B) Option2 C) Cleavage furrow D) Option4 Answer: C) ...

🧬 Chapter 3: The Cell – MCQs 1. Who discovered the cell? A) Louis Pasteur B) Robert Hooke C) Anton van Leeuwenhoek D) Schleiden ✅ Answer: B) Robert Hooke 2. The term 'cell' was derived from the Latin word “cellula” meaning: A) Water B) Small room C) Nucleus D) Tissue ✅ Answer: B) Small room 3. Which of the following is not a part of cell theory? A) All living things are made of cells B) Cells are the basic units of life C) All cells have a nucleus D) All cells come from pre-existing cells ✅ Answer: C) All cells have a nucleus 4. Which scientist proposed that all animals are made up of cells? A) Schleiden B) Schwann C) Virchow D) Hooke ✅ Answer: B) Schwann 5. The smallest living unit in an organism is: A) Organelle B) Tissue C) Cell D) Organ ✅ Answer: C) Cell 6. A typical cell has how many main parts? A) One B) Two C) Three D) Four ✅ Answer: C) Three (cell membrane, cytoplasm, nucleus) 7. Which cell organelle is called the 'powerh...

  50 (MCQs) for Chapter 2: Biodiversity   1. What is biodiversity? a) Study of ecosystems b) Variety of life on Earth c) Science of classification d) Only study of plants Sol: (b) Variety of life on Earth 2. Which branch of biology deals with classification of organisms? a) Morphology b) Ecology c) Taxonomy d) Genetics Sol: (c) Taxonomy 3. Who is known as the father of taxonomy? a) Charles Darwin b) Gregor Mendel c) Aristotle d) Carolus Linnaeus Sol: (d) Carolus Linnaeus 4. The system introduced by Linnaeus for naming organisms is called: a) Binary code b) Scientific naming c) Binomial nomenclature d) Biodiversity classification Sol: (c) Binomial nomenclature 5. In binomial nomenclature, the first part of the name represents: a) Species b) Order c) Family d) Genus Sol: (d) Genus 6. In binomial nomenclature, the second part represents: a) Class b) Phylum c) Species d) Kingdom Sol: (c) Species 7. The correct way to write the scientifi...

MCQs for Class 9 Biology 1. The word “biology” has been derived from two…………..words. a) Latin b) Greek c) English d) Scientific Sol: (b) Greek 2. In biology the word “bios” means……….. a) Life b) Logos c) Living things d) All of the above Sol: (a) Life 3. In biology the word “logos” means……… a) Thought b) Reasoning c) Thought or reasoning d) None Sol: (c) Thought or reasoning 4. The division of biology in which we study animals is called…… a) Botany b) Zoogeography c) Zoology d) Cell biology Sol: (c) Zoology 5. The division of biology in which we study plants is called…….. a) Botany b) Zoology c) Zoology and Botany d) Plant ecology Sol: (a) Botany 6. The study of tissues is called……… a) Anatomy b) Histology c) Physiology d) Entomology Sol: (b) Histology 7. The study of internal structures is called….. a) Anatomy b) Cell biology c) Genetics d) Biotechnology Sol: (a) Anatomy 8. The transmission of characters from one generation to the oth...

What Are Prokaryotes and Eukaryotes? In the vast and fascinating world of biology, one of the fundamental distinctions among living organisms is the type of cells they are made of. All living beings are composed of cells, but not all cells are the same. They are categorized into prokaryotic and eukaryotic cells — a classification that helps scientists understand the structure, function, and evolution of life on Earth. Let’s explore what prokaryotes and eukaryotes are, their differences, and why they matter. 🔬 What Are Prokaryotes? Prokaryotes are single-celled organisms that lack a true nucleus and membrane-bound organelles . The word "prokaryote" comes from Greek, where "pro" means before and "karyon" means nucleus — meaning "before nucleus." ✅ Key Characteristics of Prokaryotes: No nucleus : The DNA floats freely in the cytoplasm in a region called the nucleoid . No membrane-bound organelles : Structures like mitochondria, endoplasmic...