All Practice Exams
100+ Free Kerala SSLC Biology Practice Questions
Kerala Pareeksha Bhavan Secondary School Leaving Certificate (SSLC / Class 10) Biology Examination practice questions are available now; exam metadata is being verified.
✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free
Loading practice questions...
Same family resources
Explore More Kerala SSLC (Class 10)
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
2026 Statistics
Key Facts: Kerala SSLC Biology Exam
TE ~40 + CE ~10
Common subject total near 50 marks for Kerala SSLC Biology
Pareeksha Bhavan / SCERT evaluation practice (confirm current circular)
~1.5 h
Common theory (TE) duration for SSLC Biology written paper
Pareeksha Bhavan exam timetable practice (confirm current year)
D+ / ~30%
Often-cited minimum grade band under Kerala SSLC grade rules
Pareeksha Bhavan result rules (confirm current circular)
100
Free OpenExamPrep English practice MCQs (not official item count)
OpenExamPrep
FREE 2026 Kerala SSLC Biology English MCQ practice for Class 10 covering SCERT units from nervous system and sense organs through immunity, genetics, and evolution (TE ~40 + CE ~10 ≈ 50; ~1.5 h theory).
Sample Kerala SSLC Biology Practice Questions
Try these sample questions to test your Kerala SSLC Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1The structural and functional unit of the nervous system is the:
A.Neuron
B.Nephron
C.Nephron loop
D.Nissl body only
Explanation: A neuron (nerve cell) is the structural and functional unit of the nervous system: it receives stimuli, conducts impulses, and communicates via synapses. Nephrons are kidney units; Nissl bodies are cytoplasmic features of neurons, not whole units.
2Which part of a typical multipolar neuron receives incoming stimuli from other cells?
A.Axon terminal only
B.Dendrites
C.Myelin sheath
D.Node of Ranvier only
Explanation: Dendrites are branched processes that receive synaptic input and carry graded signals toward the cell body. Axon terminals release transmitter; myelin insulates axons; nodes speed saltatory conduction but are not the primary receiving surface.
3In a chemical synapse, the direction of impulse transmission is normally:
A.Bidirectional at equal speed
B.From dendrite to axon of the same neuron only via gap junctions
C.From axon terminal of one neuron to dendrite/soma of the next
D.From myelin to node of Ranvier only
Explanation: Chemical synapses are typically one-way: neurotransmitter is released from the presynaptic axon terminal and acts on receptors on the postsynaptic membrane (often dendrite or soma). This polarity prevents reverse transmission under normal conditions.
4Which of the following best describes a reflex arc for a simple spinal reflex?
A.Brain cortex → cranial nerve → effector only
B.Hormone → blood → target organ only
C.Receptor → motor neuron → sensory neuron → brain always
D.Receptor → sensory neuron → spinal cord interneuron/motor pathway → effector
Explanation: A classic spinal reflex path is receptor → afferent (sensory) neuron → CNS integration (often spinal interneurons) → efferent (motor) neuron → effector (muscle/gland). The cerebral cortex is not required for many spinal reflexes.
5The myelin sheath around many vertebrate axons is formed by:
A.Schwann cells (PNS) or oligodendrocytes (CNS)
B.Osteocytes
C.Erythrocytes
D.Chondrocytes
Explanation: In the peripheral nervous system Schwann cells wrap axons; in the central nervous system oligodendrocytes form myelin. Myelin increases conduction speed via saltatory conduction. The other cell types are bone, blood, and cartilage cells.
6Which brain region is primarily responsible for coordinating voluntary muscle movements and maintaining posture and balance?
A.Medulla oblongata only for all motor plans
B.Cerebellum
C.Hypothalamus
D.Olfactory bulb
Explanation: The cerebellum fine-tunes and coordinates voluntary movements and helps maintain balance and posture by integrating sensory feedback. Medulla handles vital autonomic centers; hypothalamus regulates homeostasis/endocrine links; olfactory bulb processes smell.
7The part of the brain that regulates body temperature, thirst, hunger, and many endocrine links is the:
A.Cerebellum
B.Corpus callosum
C.Hypothalamus
D.Optic chiasma
Explanation: The hypothalamus is a key homeostatic center controlling temperature, thirst, hunger, and the pituitary–endocrine axis. Cerebellum coordinates movement; corpus callosum connects hemispheres; optic chiasma is a visual pathway crossing.
8Saltatory conduction occurs because action potentials jump between:
A.Dendritic spines only
B.Synaptic vesicles
C.Nissl bodies
D.Nodes of Ranvier
Explanation: In myelinated axons, depolarization is regenerated mainly at nodes of Ranvier, so the impulse appears to jump from node to node (saltatory conduction), which is faster and more energy-efficient than continuous conduction.
9Which statement about the autonomic nervous system is correct?
A.It regulates involuntary functions such as heart rate and gland secretion
B.It only innervates skeletal muscle for voluntary movement
C.It is identical to the somatic motor system for limb movement
D.It never uses chemical synapses
Explanation: The autonomic (visceral) nervous system regulates involuntary effectors—smooth muscle, cardiac muscle, and glands—via sympathetic and parasympathetic divisions. Skeletal muscle voluntary control is somatic.
10Phototropism in plants is mainly mediated by redistribution of the hormone:
A.Abscisic acid only
B.Auxin (IAA)
C.Ethylene only
D.Cytokinin only
Explanation: Uneven auxin distribution causes differential elongation, bending shoots toward light (positive phototropism). ABA mainly promotes dormancy/stress responses; ethylene is linked to fruit ripening/abscission; cytokinins promote cell division.
About the Kerala SSLC Biology Practice Questions
Verified exam format metadata for Kerala Pareeksha Bhavan Secondary School Leaving Certificate (SSLC / Class 10) Biology Examination is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.