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Structural Organisation in Animals — NEET Biology MCQs with Solutions
Free NEET Biology Structural Organisation in Animals MCQs with step-by-step solutions covering Epithelial Tissue, Connective Tissue, Muscular Tissue, Neural Tissue, Organ & Organ System, Morphology & Anatomy of Cockroach / Frog. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Epithelial Tissue · easy · theory
Epithelial tissue rests on a non-cellular basement membrane and has:
A. Contractile fibres
B. Cells compactly packed with little intercellular material ✓ Correct
C. A rich blood supply within the layer
D. Abundant matrix between cells
Solution: Epithelia are compact with minimal intercellular space, avascular, and sit on a basement membrane.
Q2 — Epithelial Tissue · easy · theory
The epithelium lining blood vessels and air sacs, made of a single layer of flat cells, is:
A. Simple squamous ✓ Correct
B. Columnar
C. Simple cuboidal
D. Stratified
Solution: Simple squamous (pavement) epithelium forms thin diffusion barriers (alveoli, capillary walls).
Q3 — Connective Tissue · easy · theory
The most abundant tissue in animals, specialised to link and support other tissues/organs, is:
A. Connective tissue ✓ Correct
B. Neural tissue
C. Epithelial tissue
D. Muscular tissue
Solution: Connective tissue has cells loosely spread in an abundant matrix and includes blood, bone, cartilage and adipose tissue.
Q4 — Connective Tissue · easy · theory
The fluid connective tissue that transports nutrients, gases and wastes is:
A. Cartilage
B. Bone
C. Areolar tissue
D. Blood ✓ Correct
Solution: Blood is a fluid connective tissue with plasma matrix and formed elements; lymph is another fluid connective tissue.
Q5 — Muscular Tissue · easy · theory
Muscle fibres attached to bones for voluntary movement are:
A. Cardiac muscle
B. Neural tissue
C. Smooth muscle
D. Skeletal (striated) muscle ✓ Correct
Solution: Skeletal muscles are striated, voluntary and attached to the skeleton; they bundle into muscle organs.
Q6 — Muscular Tissue · easy · theory
The muscle found exclusively in the wall of the heart is:
A. Skeletal muscle
B. Cardiac muscle ✓ Correct
C. Visceral muscle
D. Smooth muscle
Solution: Cardiac muscle is striated but involuntary and shows branching fibres with intercalated discs.
Q7 — Neural Tissue · easy · theory
The structural and functional unit of neural tissue is the:
A. Neuron ✓ Correct
B. Myofibril
C. Neuroglia
D. Nephron
Solution: Neurons are excitable cells that generate and transmit impulses; neuroglia support and protect them.
Q8 — Neural Tissue · easy · theory
Neuroglial cells in neural tissue function to:
A. Contract
B. Secrete hormones only
C. Support and protect neurons ✓ Correct
D. Conduct impulses like neurons
Solution: Neuroglia (more than half of neural tissue volume) support, insulate and nourish neurons.
Q9 — Organ & Organ System · easy · theory
A group of different tissues organised to perform a specific function forms an:
A. Organ system
B. Tissue
C. Cell
D. Organ ✓ Correct
Solution: Organs (e.g. stomach, heart) are made of two or more tissue types working together.
Q10 — Organ & Organ System · easy · theory
Organs that together carry out a coherent set of functions constitute an:
A. Tissue system
B. Organ system ✓ Correct
C. Cell
D. Organ
Solution: Organ systems (e.g. digestive, circulatory) are groups of organs coordinating a major function.
Q11 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The excretory organs of the cockroach are the:
A. Kidneys
B. Green glands
C. Nephridia
D. Malpighian tubules ✓ Correct
Solution: Malpighian tubules at the midgut–hindgut junction remove nitrogenous waste (uric acid) in cockroaches.
Q12 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The body of a cockroach is divided into three regions:
A. Head, thorax and abdomen ✓ Correct
B. Thorax and abdomen only
C. Cephalothorax and abdomen
D. Head and trunk
Solution: The cockroach body has a head, thorax (bearing legs and wings) and a segmented abdomen.
Q13 — Epithelial Tissue · hard · theory
Compound (stratified) epithelium differs from simple epithelium mainly in its:
A. Role in secretion and absorption
B. Protective function due to many cell layers ✓ Correct
C. Single-layered structure
D. Presence of cilia in all cases
Solution: Compound epithelium (e.g. skin, buccal cavity) is multilayered and chiefly protective, with limited secretion/absorption.
Q14 — Epithelial Tissue · hard · theory
Glandular epithelium that releases its product by rupture of the entire cell (cell becomes the secretion) is:
A. Endocrine only
B. Merocrine (eccrine)
C. Apocrine
D. Holocrine ✓ Correct
Solution: In holocrine secretion the whole cell disintegrates to release product (e.g. sebaceous glands); merocrine cells stay intact.
Q15 — Connective Tissue · hard · theory
Cartilage differs from bone in that its matrix is:
A. Non-mineralised (chondroitin), so it is pliable; bone matrix is calcium-hardened ✓ Correct
B. Devoid of cells
C. Harder than bone
D. Fluid
Solution: Cartilage matrix (chondrocytes in lacunae) is solid but pliable; bone matrix is impregnated with calcium salts giving rigidity.
Q16 — Connective Tissue · hard · theory
The cells that secrete the bone matrix and those that resorb it are, respectively:
A. Chondroblasts and osteoblasts
B. Osteoclasts and osteocytes
C. Fibroblasts and mast cells
D. Osteoblasts and osteoclasts ✓ Correct
Solution: Osteoblasts deposit bone; osteoclasts break it down; mature bone cells are osteocytes in lacunae.
Q17 — Muscular Tissue · hard · theory
Which combination correctly describes skeletal muscle?
A. Striated, involuntary, branched
B. Non-striated, voluntary
C. Striated, voluntary, multinucleate, cylindrical fibres ✓ Correct
D. Non-striated, involuntary, uninucleate
Solution: Skeletal muscle fibres are long, cylindrical, striated, multinucleate and under voluntary control.
Q18 — Muscular Tissue · hard · theory
The correct grouping of muscle by control is:
A. Skeletal and Cardiac — voluntary
B. All three voluntary
C. Only Smooth — voluntary
D. Skeletal — voluntary; Cardiac and Smooth — involuntary ✓ Correct
Solution: Only skeletal muscle is voluntary; both cardiac and smooth muscle are involuntary.
Q19 — Neural Tissue · hard · theory
Neurons are described as "amitotic" and highly specialised because they:
A. Generally do not divide once mature and are specialised for conduction ✓ Correct
B. Store fat
C. Divide rapidly throughout life
D. Secrete a matrix
Solution: Mature neurons are usually amitotic (do not divide) and are highly specialised for receiving and transmitting impulses.
Q20 — Neural Tissue · hard · theory
Neural tissue exerts the greatest control over the body's responsiveness because it:
A. Stores energy
B. Forms the skeleton
C. Detects, receives and rapidly transmits stimuli, coordinating with muscles/glands ✓ Correct
D. Provides mechanical support only
Solution: Neural tissue senses changes and coordinates rapid responses, linking receptors to effectors (muscles/glands).
Q21 — Organ & Organ System · hard · theory
The heart is an organ (not a tissue) because it:
A. Is built of several tissue types (cardiac muscle, connective, epithelial, neural) ✓ Correct
B. Is made of a single tissue
C. Has no specific function
D. Cannot function on its own
Solution: Organs contain multiple integrated tissues; the heart combines cardiac muscle, connective, epithelial (endocardium) and neural tissue.
Q22 — Organ & Organ System · hard · theory
Coordination among organ systems in higher animals is achieved chiefly by the:
A. Skeletal system alone
B. Integumentary system
C. Digestive system only
D. Neural and endocrine (nervous + hormonal) systems ✓ Correct
Solution: The nervous system (fast) and endocrine system (slower, sustained) together integrate the activities of all organ systems.
Q23 — Morphology & Anatomy of Cockroach / Frog · hard · theory
In the frog, the heart is ______ chambered and it exhibits ______ circulation:
A. Two; single
B. Three; single
C. Four; double
D. Three; double ✓ Correct
Solution: The frog has a three-chambered heart (two atria, one ventricle) with double circulation (some mixing of blood occurs).
Q24 — Morphology & Anatomy of Cockroach / Frog · hard · theory
The frog respires through its skin (cutaneous), buccal cavity and lungs. Cutaneous respiration is possible because the skin is:
A. Dry and keratinised
B. Impermeable
C. Moist and richly vascularised ✓ Correct
D. Covered with scales
Solution: The frog's moist, vascular skin allows gas exchange in water and on land; frogs are ectothermic amphibians.
Q25 — Epithelial Tissue · medium · theory
Ciliated columnar epithelium is found lining the ______, where cilia move mucus/particles:
A. Respiratory tract and fallopian tubes ✓ Correct
B. Skin surface
C. Blood capillaries
D. Kidney tubules only
Solution: Ciliated epithelium moves substances in the trachea, bronchioles and oviducts.
Q26 — Epithelial Tissue · medium · theory
Cell junctions that provide strong adhesion (cementing neighbouring cells) are:
A. Gap junctions
B. Tight junctions
C. Adhering junctions (desmosomes) ✓ Correct
D. Synapses
Solution: Tight junctions seal to prevent leakage; adhering junctions cement cells; gap junctions allow communication.
Q27 — Connective Tissue · medium · theory
Adipose tissue is a type of loose connective tissue specialised for:
A. Storage of fat ✓ Correct
B. Rigid support
C. Rapid conduction
D. Contraction
Solution: Adipocytes of adipose tissue store fat, acting as insulation and an energy reserve.
Q28 — Connective Tissue · medium · theory
The connective tissue that connects two bones at a joint is a ______, while a ______ connects muscle to bone:
A. Cartilage; ligament
B. Ligament; tendon ✓ Correct
C. Bone; cartilage
D. Tendon; ligament
Solution: Ligaments (elastic) join bone to bone; tendons (tough, collagenous) join muscle to bone — both dense connective tissue.
Q29 — Muscular Tissue · medium · theory
Smooth (unstriated) muscle is characterised as:
A. Present only in bones
B. Branched with intercalated discs
C. Involuntary, spindle-shaped, without striations — found in visceral organs ✓ Correct
D. Voluntary and striated
Solution: Smooth muscle lines hollow visceral organs (gut, blood vessels) and is involuntary and non-striated.
Q30 — Muscular Tissue · medium · theory
Intercalated discs, which allow synchronised contraction, are a feature of:
A. Tendons
B. Skeletal muscle
C. Smooth muscle
D. Cardiac muscle ✓ Correct
Solution: Intercalated discs are communication junctions unique to cardiac muscle, enabling coordinated heartbeats.