11th Std BIOLOGY COMPREHENSIVE QUESTION BANK
Consolidated unique questions extracted from official evaluation test papers. Mastering Class 11 Biology requires a strategic approach, and practicing the curated 2-Mark, 3-Mark, and 5-Mark important questions is the most effective way to secure a top score in your exams. This comprehensive question bank covers fundamental core concepts across Bio-Botany and Bio-Zoology—ranging from cell biology and plant anatomy to complex physiological mechanisms. By focusing on 2M questions for precise definitions, 3M questions for conceptual distinctions, and 5M questions for detailed botanical descriptions and structural diagrams, students can streamline their revision, manage their time efficiently during the exam, and approach the paper with absolute confidence.
PART I – BIO-BOTANY
2-MARK QUESTIONS (2M)
1. Differentiate Homeiomerous and Heterorous lichens.
2. Mention any two algae which are used as food substances.
3. Give the technical terms for the following:
• a. A sterile stamen
• b. Stamens are united in one bunch
• c. Stamens are attached to the petals
4. Define synapsis.
5. What is meant by secondary metabolites?
6. Where will you place the plants which contain two cotyledons with cup-shaped thalamus?
7. Define enzymes.
8. What is placentation?
9. Compare sympodial branching and monopodial branching.
10. Bring out the significance of Transmission Electron Microscope.
11. Define C-value.
12. What are the merits of five kingdom classification?
13. Differentiate Holoenzyme and Apoenzyme.
14. What do you infer from the term pycnoxylic?
15. Define Capnophilic Bacteria.
16. What is Eustele? Give an example.
17. Differentiate Racemose and Cymose inflorescence.
18. Why is the Artificial system of classification also known as the sexual system of classification?
19. Write any two points about the functions of the cell wall.
20. Write any two common features seen in Gymnosperms and Angiosperms.
21. Find out the floral formula for a bisexual flower with bract, regular, pentamerous, distinct calyx and corolla, superior ovary without bracteole.
22. Name the four types of bonds seen in proteins.
23. What is Fimbriae?
24. Write short notes on Pitcher plants.
25. What is False fruit?
26. What is Chiasmata?
27. Write Erwin Chargaff’s rule.
3-MARK QUESTIONS (3M)
1. Write a note on the merits and demerits of five kingdom classification.
2. Do you think the shape of chloroplast is unique for algae? Justify your answer.
3. Classify chromosomes based on the position of the centromere.
4. Write the properties of water.
5. What is plectostele? Give an example.
6. Write any three significances of mitosis.
7. Write the distinguishing features of Monera.
8. Differentiate cytokinesis in plant cells and animal cells.
9. Name the alkaloids present in Nicotiana tabacum.
10. Differentiate between aggregate fruit and multiple fruit.
11. Define Ribozyme.
12. What is amber? From which plant is Amber extracted?
13. Differentiate Nucleoside and Nucleotide.
14. List out the importance of Mycorrhizae.
15. What are fleshy fruits? Explain any one type of fleshy fruit.
16. Explain the lock and key mechanism of enzymes.
17. Define Herbarium.
18. Differentiate Transmission Electron Microscope and Scanning Electron Microscope.
5-MARK QUESTIONS (5M)
1. Define Stele. What are its types?
2. Differentiate between Gram-positive and Gram-negative bacteria.
3. Give the floral characters / botanical description of Clitoria ternatea.
4. State the protoplasm theory.
5. Write the botanical description of Datura metel.
6. Write the botanical description of the plant that you have studied under the nightshade family.
7. Differentiate between mitosis and meiosis.
8. Explain the different types of mode of distribution of placenta inside the ovary.
9. What is protostele? Explain its types with diagrams.
10. Write the steps involved in Gram staining in bacteria.
11. Describe the structure of chloroplast with a diagram.
12. Differentiate between plant cell and animal cell.
13. Describe the ultrastructure of a bacterial cell with a neat labeled diagram.
14. What is phyllotaxy? Describe the types of phyllotaxy with neat diagrams.
15. Differentiate between prokaryotes and eukaryotes.
