Structural Organisation in Animals — Class 11 MCQs with Answers
Class 11 CBSE Biology · Chapter 7
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Practise the most important Class 11 CBSE Biology questions from Chapter 7, "Structural Organisation in Animals". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE & Maharashtra HSC Board exams, MHT-CET and NEET UG apart.
To score well in "Structural Organisation in Animals", focus on diagrams, key terms and knowing NCERT line by line. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Structural Organisation in Animals, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 11 Biology mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: Structural Organisation in Animals (Class 11 Biology)
Beyond single cells, animal bodies are organised into tissues, organs and systems. Four tissue types — epithelial, connective, muscular and nervous — build every organ, while the earthworm, cockroach and frog serve as model organisms whose morphology and anatomy reveal how these tissues assemble into working systems.
- Epithelial tissue
- A compact sheet of cells on a basement membrane, with little matrix; classified by cell shape as squamous, cuboidal or columnar, it lines and protects surfaces.
- Simple vs compound epithelium
- Simple epithelium is one cell thick for absorption and secretion; compound (stratified) epithelium is many-layered, protecting skin and the buccal cavity.
- Cell junctions
- Tight junctions seal cells to stop leakage, adhering junctions cement neighbours, and gap junctions allow direct cytoplasmic exchange of small molecules.
- Connective tissue
- Cells lie scattered in an abundant matrix; it includes loose (areolar, adipose), dense (tendons, ligaments), and specialised cartilage, bone and blood.
Structural Organisation in Animals — important questions & MCQs with answers (Class 11 Biology)
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.
- Q1Easy
Tissue lining the body cavities:
A.Epithelial✓ CorrectB.MuscleC.NervousD.ConnectiveAnswer: A. Epithelial
Explanation: Epithelial tissue lines cavities and covers surfaces, sitting on a basement membrane with almost no matrix — connective tissue looks similar but is packed with matrix between its cells instead.
- Q2Easy
A group of similar cells with common origin performing a specific function is called?
A.Tissue✓ CorrectB.OrganC.Organ systemD.OrganismAnswer: A. Tissue
Explanation: A tissue is a group of similar cells with a common origin that work together to perform one specific function — the next level up, an organ, instead combines several different tissue types.
- Q3Easy
Frog belongs to which class?
A.ReptiliaB.Amphibia✓ CorrectC.PiscesD.AvesAnswer: B. Amphibia
Explanation: Rana tigrina, the frog, belongs to class Amphibia — animals living both in water and on land, breathing by gills, skin or lungs depending on life stage, unlike scaled, purely lung-breathing Reptilia.
- Q4Easy
Heart muscle is:
A.Smooth onlyB.SkeletalC.Cardiac (involuntary, striated)✓ CorrectD.NervousAnswer: C. Cardiac (involuntary, striated)
Explanation: Cardiac muscle is striated like skeletal muscle but involuntary, with branching fibres joined by intercalated discs that skeletal fibres never have — that disc is the real giveaway feature.
- Q5Easy
Correct hierarchy of biological organisation?
A.Cell → organ → tissue → organismB.Tissue → cell → organ → organismC.Organ → organism → tissue → cellD.Cell → tissue → organ → organ system → organism✓ CorrectAnswer: D. Cell → tissue → organ → organ system → organism
Explanation: Biological organisation runs cell to tissue to organ to organ system to organism — tissues are groups of cells, organs combine several tissue types, and organ systems combine organs for one broad job.
- Q6Easy
Heart of frog is?
A.Two-chamberedB.TubularC.Four-chamberedD.Three-chambered✓ CorrectAnswer: D. Three-chambered
Explanation: The frog's heart is three-chambered: two atria receiving blood separately from the body and lungs, plus one shared ventricle — mammals instead have a four-chambered heart with two separate ventricles.
- Q7Medium
Blood is a:
A.Epithelial tissueB.Fluid connective tissue✓ CorrectC.MuscleD.NervousAnswer: B. Fluid connective tissue
Explanation: Blood counts as connective tissue because its cells (RBCs, WBCs, platelets) sit in a non-living matrix — here liquid plasma, instead of the solid matrix of bone or cartilage the name usually suggests.
- Q8Medium
Clitellum in Pheretima is located in segments?
A.5-7B.14-16✓ CorrectC.20-22D.30-32Answer: B. 14-16
Explanation: The clitellum, a glandular saddle that secretes the cocoon for egg-laying, covers segments 14 to 16 in Pheretima — spermathecal openings instead lie further forward, in grooves 5/6 through 8/9.
- Q9Medium
Earthworm respires through:
A.GillsB.LungsC.Moist skin✓ CorrectD.TracheaeAnswer: C. Moist skin
Explanation: Earthworms have no lungs, gills or tracheae; oxygen diffuses directly across their thin, moist, vascular skin — cutaneous respiration, unlike the tracheal system insects such as cockroaches use.
- Q10Medium
Goblet cells of intestine are an example of?
A.Endocrine glandB.Unicellular exocrine gland✓ CorrectC.Multicellular glandD.Compound glandAnswer: B. Unicellular exocrine gland
Explanation: Goblet cells are unicellular exocrine glands scattered in the intestinal lining that secrete mucus directly onto the epithelial surface — multicellular glands like salivary glands instead form cell clusters.
- Q11Medium
Earthworm blood is red due to haemoglobin dissolved in?
A.Plasma✓ CorrectB.RBCsC.WBCsD.Coelomic fluidAnswer: A. Plasma
Explanation: Earthworms have no red blood cells; their red haemoglobin is dissolved directly in the blood plasma instead of packed into cells, unlike vertebrates such as the frog, whose RBCs do carry it.
- Q12Hard
Functional unit of nervous tissue:
A.OsteocyteB.NephronC.HepatocyteD.Neuron✓ CorrectAnswer: D. Neuron
Explanation: The neuron is the structural and functional unit of nervous tissue, generating and conducting impulses — neuroglia are the other nerve-tissue cells but only support neurons, they don't transmit signals.
- Q13Hard
Assertion: Earthworms are detritivores. Reason: They feed on decaying organic matter and enrich soil.
A.A true, R falseB.Both true; R doesn't explain AC.Both true; R explains A✓ CorrectD.A false, R trueAnswer: C. Both true; R explains A
Explanation: Earthworms are detritivores that ingest decaying leaves and organic matter as they burrow, aerating and enriching the soil in the process — this feeding habit is exactly why they're called farmers' friends.
- Q14Hard
Frog's heart has ___ chambers.
A.4B.3✓ CorrectC.2D.1Answer: B. 3
Explanation: A frog's heart has three chambers — two atria and one ventricle — unlike the four-chambered mammalian heart; the single shared ventricle is why oxygenated and deoxygenated blood partially mix.
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Start this chapter free →Structural Organisation in Animals — FAQs
What are the key concepts in Class 11 Biology Structural Organisation in Animals?+
Beyond single cells, animal bodies are organised into tissues, organs and systems. Four tissue types — epithelial, connective, muscular and nervous — build every organ, while the earthworm, cockroach and frog serve as model organisms whose morphology and anatomy reveal how these tissues assemble into working systems. Key ideas include Epithelial tissue, Simple vs compound epithelium, Cell junctions, Connective tissue.
What does Class 11 Biology Chapter 7 (Structural Organisation in Animals) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "Structural Organisation in Animals": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE & Maharashtra HSC Board exams, MHT-CET and NEET UG.
Are these "Structural Organisation in Animals" questions free to practise?+
Yes. Sign in with Google to practise "Structural Organisation in Animals" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Structural Organisation in Animals" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Structural Organisation in Animals" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Structural Organisation in Animals" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip, the same negative marking as NEET UG. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Structural Organisation in Animals (Class 11 Biology)?+
The questions that matter most test Epithelial tissue, Simple vs compound epithelium, Cell junctions, Connective tissue. This page shows 14 solved important MCQs with answers and explanations; all 90 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Structural Organisation in Animals?+
Yes — Class 11 Biology Structural Organisation in Animals has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.