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Chapter 1: The Living World
Biodiversity; Need for classification; three domains of life; taxonomy and systematics; concept of species and taxonomical hierarchy; binomial nomenclature.
17
Chapter 2: Biological Classification
Five kingdom classifications; Salient features and classification of Monera, Protista and Fungi; Lichens, Viruses and Viroids.
28
Chapter 3: Plant Kingdom
Classification into major groups; Features and examples of Algae, Bryophyta, Pteridophyta, Gymnospermae (Excluded: Angiosperms, Plant Life Cycle & Alternation of Generations).
24
Chapter 4: Animal Kingdom
Salient features and classification: Non-chordates up to phyla level and chordates up to class level; examples of each. (No live specimens to be displayed).
34
Chapter 5: Morphology of Flowering Plants
Morphology of root, stem, leaf, inflorescence, flower, fruit, seed; description of family Solanaceae.
46

Symbiotic Associations of Fungi (Mycorrhizae, Lichens)

Symbiotic Associations of Fungi (Mycorrhizae, Lichens) — CBSE Class 11 Biology 30 MCQ Quiz

Unit 1: Diversity of Living Organisms — Chapter 2: Biological Classification

CBSE Class 11 — Subject: Biology

30:00

Questions: 30 | Duration: 30 minutes

1. What is a mycorrhiza?

A parasitic fungus on animals Symbiotic association between fungal hyphae and plant roots A colour-producing pigment in fungi Asexual spore of fungi

2. Which type of mycorrhiza forms a sheath around roots and penetrates between cortical cells (but not into cells)?

Arbuscular mycorrhiza Endomycorrhiza Ectomycorrhiza Lichenized mycorrhiza

3. Arbuscular mycorrhizae (formerly VAM) typically form which structure inside root cortical cells?

Ectomycorrhizal sheath Arbuscules and vesicles Lichen thallus Haustoria of parasitic fungi

4. Which phylum (group) contains fungi that form arbuscular mycorrhizae?

Glomeromycota Ascomycota Basidiomycota Zygomycota

5. One main benefit of mycorrhizal association to plants is:

Increased seed production only Protection from all herbivores Making plants photosynthetic Enhanced nutrient (P) uptake and water absorption

6. Ectomycorrhizae are most commonly associated with which plant group?

Grasses and many crops Forest trees (e.g., pines, oaks) Algae in lichens Aquatic angiosperms only

7. What is a lichen?

A parasitic fungus on roots A fungal fruiting body Symbiotic association between a fungus (mycobiont) and a photosynthetic partner (photobiont) A mycorrhizal sheath around roots

8. Which fungal group most commonly forms the fungal partner in lichens?

Ascomycetes Basidiomycetes Zygomycetes Glomeromycota

9. Photobiont in a lichen may be:

A fungus only Green algae or cyanobacteria A plant root A basidiocarp

10. Lichens are important ecological indicators because they are sensitive to:

Soil pH only Excess water only Nutrient availability only Air pollution (e.g., sulphur dioxide) and environmental changes

11. Which lichen form is crust-like and tightly attached to the substrate?

Crustose Foliose Fruticose Leprose

12. Soredia and isidia in lichens are structures for:

Photosynthesis Vegetative reproduction and dispersal Forming mycorrhizae Fixing nitrogen in roots

13. Which lichen type is bushy and three-dimensional?

Crustose Foliose Fruticose Squamulose

14. Nitrogen fixation in some lichens is performed by which photobiont?

Green algae only Fungi Plant roots Cyanobacteria (e.g., Nostoc)

15. Which statement best describes the relationship in lichens?

Pure parasitism where fungus harms the photobiont Mutualistic/commensal partnership where both partners benefit or tolerate each other Fungus provides nitrogen while algae digests rock Algae parasitize fungal hyphae

16. Mycorrhizae enhance phosphorus uptake because fungal hyphae:

Increase absorptive surface area and access soil microsites Fix atmospheric nitrogen for plants Produce photosynthates for plants Repel root herbivores only

17. Ectomycorrhizal fungi often form a network connecting multiple trees; this network is called:

Mycelial sheath Rhizobial matrix Common mycorrhizal network (CMN) Lichen colony

18. Which of the following is NOT a function of lichens in ecosystems?

Soil formation by rock weathering Producing large quantities of oxygen through photosynthesis on global scale Acting as pioneer species on bare substrates Serving as food and habitat for small animals

19. Which structure is formed when ectomycorrhizal hyphae penetrate between root cortical cells forming a network?

Hartig net Arbuscule Vesicle Soredium

20. Which of these is a commercial use of lichens?

Production of industrial enzymes Large-scale antibiotic manufacturing Dyes, perfumes and traditional medicines Producing ethanol for beverages

21. Which statement about mycorrhiza and plant drought tolerance is correct?

Mycorrhizae always reduce drought tolerance They often improve water uptake and drought tolerance They block water uptake completely They only function in flooded soils

22. Which experimental evidence supports the role of mycorrhizae in phosphorus uptake?

Plants with mycorrhizae show higher P content than non-mycorrhizal controls Mycorrhizal plants always grow in complete darkness Mycorrhizae convert P into atmospheric gas Roots with mycorrhizae never absorb water

23. Which organelle-like structure does the fungal partner provide in lichens?

Chloroplasts to the fungus Root hairs for algae Protection, water retention and mineral absorption for photobiont Mycorrhizal networks between lichens

24. Lichen sensitivity to air pollution makes them useful for monitoring which pollutant?

Nitrate deposition only Sulphur dioxide (SO2) Groundwater salinity Soil heavy metals only

25. Which of the following best describes an obligate mycorrhizal plant?

Plant that depends on mycorrhizal association for normal growth Plant that cannot photosynthesize Plant that is parasitic to fungi Plant that lives only in water

26. The presence of soredia indicates that a lichen reproduces primarily by:

Sexual reproduction of the fungus only Vegetative reproduction of the fungus only Spore formation in algae only Vegetative dispersal units containing both partners

27. Which method is commonly used to experimentally test lichen tolerance to pollution?

Measuring rate of root colonization by fungi Counting fungal spores in soil Transplanting lichens to polluted sites and monitoring survival Assessing presence of mycorrhizal arbuscules

28. Which term describes lichens that grow on rocks?

Epiphytic Saxicolous (or lithophytic) Terrestrial Aquatic

29. Which of the following best exemplifies a mutualistic benefit of mycorrhizae?

Fungus receives carbohydrates while plant receives increased mineral uptake Fungus feeds on plant roots causing disease Fungus provides nitrogen gas to atmosphere Plant digests fungal cell walls

30. Overall, symbiotic associations like mycorrhizae and lichens are important because they:

Only harm plants and substrates Only occur in laboratories Enhance nutrient cycles, aid colonization and serve as ecological indicators Are extinct groups with no modern relevance

Prepared fully as per NCERT syllabus — practice for CBSE Board & NEET-UG aspirants.

Titles

Symbiotic Associations of Fungi MCQs — CBSE Practice Test
Mycorrhizae & Lichens — 30-Question Timed MCQ Quiz (Class 11)
CBSE Class 11 Biology: Symbiotic Fungi Quiz with Automatic Scoring
NEET-UG Ready: Mycorrhizae and Lichens MCQs — Instant Feedback
NCERT Aligned Quiz: Symbiotic Associations of Fungi (MCQs)

Introduction Paragraph
The Symbiotic Associations of Fungi MCQs practice quiz focuses on mycorrhizae and lichens and is strictly aligned with the NCERT Class 11 Biology syllabus. Designed as a timed 30-question online test with automatic scoring and instant per-question feedback, it helps students master concepts such as arbuscules, Hartig nets, photobionts, soredia and ecological indicators. Ideal for CBSE Class 11 board revision and NEET-UG aspirants, the quiz replicates exam conditions to sharpen time management and improve accuracy. Each question includes a concise NCERT-style explanation after submission so learners can identify weak areas and build confidence before examinations. Regular practice also reinforces recall and reduces careless mistakes.

Tags
CBSE Class 11 Biology MCQs, Symbiotic associations fungi MCQs practice, NCERT aligned online practice test, Automatic scoring biology MCQ quiz, NEET UG fungi revision quiz, Timed 30 minute MCQ test, Per-question feedback and explanations, CBSE board exam biology practice

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