All Practice Exams

Free Practice Questions for Tamil Nadu HSE Second Year Zoology

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card
100+ Questions
100% Free

Loading practice questions...

Exam Review

Key Facts: Tamil Nadu HSE Second Year Zoology Exam

10:00–1:15

Official March 2026 HSE+2 theory sitting window including reading/verification time (dge.tn.gov.in timetable)

DGE TN HSE+2 March 2026 public examination timetable

35/100

Minimum pass mark per subject under the HSE new pattern, subject to theory/practical floor rules

DGE HSE_E.pdf scheme of examination

3 hours

Approximate theory writing duration after reading and particulars verification in the public exam schedule

DGE TN HSE+2 March 2026 timetable

DGE TN

Administered by the Directorate of Government Examinations, Chennai, for Tamil Nadu State Board Higher Secondary

dge.tn.gov.in

SCERT syllabus

Class 12 textbooks and syllabus prescribed by SCERT / School Education Department (Samacheer Kalvi)

DGE HSE scheme — syllabus prescribed by SCERT/DSE

English MCQ bank

This practice set is an English-language MCQ study adaptation, not the official mixed written paper

OpenExamPrep practice-content policy

₹150/₹200

School exam fee band for groups without/with practical subjects plus certificate/service charges (concessions apply)

DGE HSE_E.pdf school candidate fee table

March 2026

HSE Second Year public theory examinations scheduled 2–26 March 2026 with practicals 9–14 February 2026

DGE TN official timetable PDF 04.11.2025

Free English MCQ practice for Tamil Nadu HSE +2 Zoology (DGE). Official paper is mixed written theory on the Samacheer Kalvi Class 12 syllabus — this bank is a study adaptation, not a format simulation.

Sample Tamil Nadu HSE Second Year Zoology Practice Questions

Try these sample questions to review concepts for the Tamil Nadu HSE Second Year Zoology exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which enzyme begins chemical digestion of starch in the human mouth?
A.Amylase (ptyalin)
B.Pepsin
C.Lipase
D.Trypsin
Explanation: Salivary amylase (ptyalin) hydrolyses starch to maltose in the mouth under slightly alkaline conditions. Pepsin and trypsin digest proteins, and lipase digests fats.
2Hydrochloric acid in gastric juice is secreted mainly by which stomach cells?
A.Chief (peptic) cells
B.Parietal (oxyntic) cells
C.Goblet cells
D.Mucous neck cells only
Explanation: Parietal (oxyntic) cells of gastric glands secrete HCl and intrinsic factor. Chief cells secrete pepsinogen; goblet and mucous cells secrete mucus that protects the mucosa.
3Most absorption of digested nutrients in humans occurs in the:
A.Stomach
B.Large intestine
C.Small intestine
D.Oesophagus
Explanation: The small intestine (especially jejunum and ileum) has villi and microvilli that provide a huge surface area for absorption of monosaccharides, amino acids, fatty acids, vitamins, and minerals.
4Bile salts aid fat digestion primarily by:
A.Hydrolysing peptide bonds
B.Neutralising pancreatic enzymes
C.Activating pepsinogen to pepsin
D.Emulsifying fats into smaller droplets
Explanation: Bile salts emulsify large fat globules into smaller micelle-forming droplets, increasing surface area for pancreatic lipase. They do not themselves hydrolyse peptide bonds or activate pepsinogen.
5Which pancreatic enzyme converts proteins into smaller peptides in the duodenum?
A.Trypsin
B.Lipase
C.Amylase
D.Maltase
Explanation: Trypsin (from trypsinogen activated by enterokinase) cleaves proteins into peptides in the small intestine. Amylase digests starch, lipase digests fats, and maltase is an intestinal brush-border enzyme.
6In humans, the primary site of gas exchange between air and blood is the:
A.Trachea
B.Alveoli
C.Bronchi
D.Larynx
Explanation: Alveoli are thin-walled air sacs richly supplied with capillaries; O2 and CO2 diffuse across the alveolar–capillary membrane. Trachea, bronchi, and larynx mainly conduct and condition air.
7Most carbon dioxide is transported in human blood as:
A.Dissolved CO2 gas only
B.Carbaminohaemoglobin only
C.Bicarbonate ions (HCO3−)
D.Carboxyhaemoglobin
Explanation: About 70% of CO2 is transported as bicarbonate after carbonic anhydrase converts CO2 to carbonic acid in red cells, which dissociates to HCO3− and H+. Smaller fractions travel dissolved or as carbamino compounds.
8The volume of air inspired or expired during a normal quiet breath is called:
A.Vital capacity
B.Inspiratory reserve volume
C.Residual volume
D.Tidal volume
Explanation: Tidal volume is the air moved in or out in a normal quiet breath (about 500 mL in a healthy adult). Vital capacity is a sum of several volumes; residual volume remains after maximal expiration.
9Oxygen is mainly carried in blood bound to which part of haemoglobin?
A.Iron in the haem group
B.Globin protein only
C.Carbon of the porphyrin ring alone
D.Plasma albumin
Explanation: Each haem contains Fe2+ that binds one O2 molecule; four haem groups per haemoglobin allow up to four O2. Plasma carries only a small dissolved O2 fraction.
10The respiratory rhythm centre that primarily sets the basic breathing rhythm in humans is located in the:
A.Cerebellum
B.Medulla oblongata
C.Hypothalamus only
D.Spinal cord lumbar region
Explanation: The medullary respiratory centres generate the basic rhythm of inspiration and expiration. The pons modulates pattern; higher centres and chemoreceptors adjust rate and depth.

About the Tamil Nadu HSE Second Year Zoology Exam

Tamil Nadu HSE Second Year Zoology is the Class 12 public examination subject paper in Zoology under DGE Tamil Nadu. It assesses SCERT/Samacheer Kalvi Class 12 learning outcomes for this subject. Official assessment is a mixed written theory paper (with practical and internal components where applicable) totaling 100 marks per subject. Theory with practical; Bio-Zoology stream paper on official timetable. Use this free English MCQ bank to build concept fluency before the March public exams.

Exam sponsor: Directorate of Government Examinations (DGE), Tamil Nadu. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Official Tamil Nadu HSE Second Year (+2) public examination paper in Zoology, administered by DGE Tamil Nadu. March 2026 theory window: 02.03.2026–26.03.2026; practical window for +2: 09.02.2026–14.02.2026 (official timetable). Each theory sitting runs 10:00 a.m.–1:15 p.m. including question-paper reading and particulars verification (about 3 hours writing after reading). For subjects with practical: theory is commonly assessed out of 70 marks (minimum 15 in theory) with practical attendance required, internal assessment contributing to the 100-mark subject total. Official assessment is mixed written format (short/long/structured items per the year's blueprint), not pure MCQ. Theory with practical; Bio-Zoology stream paper on official timetable. Syllabus and textbooks are prescribed by SCERT / Director of School Education (Samacheer Kalvi Class 12). This site's bank is an English-language multiple-choice study adaptation for concept fluency — not an official translation, format simulation, or substitute for writing, practical, project, or oral evidence.

Time Limit

Official theory sitting 10:00 a.m.–1:15 p.m. (about 3 hours writing after reading/verification) per March 2026 DGE timetable

Passing Score

Minimum 35 out of 100 per subject overall under the new 600-mark HSE pattern (HSE_E.pdf), with additional floors: theory minimum 15/70 and must appear for practical for practical-bearing subjects. Confirm the current DGE result rules for your candidate category.

Exam / Certification Fees

School candidates: DGE HSE scheme lists examination fee ₹200 for groups with practical subjects, plus Mark Certificate ₹20 and Service Charges ₹5 (Tamil-medium candidates and notified concession categories are often fee-exempt). Private (H) candidates: per-subject fees as notified (scheme text commonly cites subject + registration/mark/service components). Confirm current-session circulars on dge.tn.gov.in — fee tables can be updated by notification.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

30%

Human Physiology

Digestion, respiration, circulation, excretion, neural control, and chemical coordination.

30%

Reproduction Genetics Evolution

Human reproduction, reproductive health, inheritance, molecular basis, and evolution.

25%

Health Disease Biotechnology

Human health and disease, microbes in human welfare, biotechnology principles and applications.

15%

Ecology and Applied Biology

Organisms and populations, ecosystems, biodiversity, and environmental issues.

Preparing for the Tamil Nadu HSE Second Year Zoology Exam

What You Need to Know

  • Passing score: Minimum 35 out of 100 per subject overall under the new 600-mark HSE pattern (HSE_E.pdf), with additional floors: theory minimum 15/70 and must appear for practical for practical-bearing subjects. Confirm the current DGE result rules for your candidate category.
  • Assessment: Official Tamil Nadu HSE Second Year (+2) public examination paper in Zoology, administered by DGE Tamil Nadu. March 2026 theory window: 02.03.2026–26.03.2026; practical window for +2: 09.02.2026–14.02.2026 (official timetable). Each theory sitting runs 10:00 a.m.–1:15 p.m. including question-paper reading and particulars verification (about 3 hours writing after reading). For subjects with practical: theory is commonly assessed out of 70 marks (minimum 15 in theory) with practical attendance required, internal assessment contributing to the 100-mark subject total. Official assessment is mixed written format (short/long/structured items per the year's blueprint), not pure MCQ. Theory with practical; Bio-Zoology stream paper on official timetable. Syllabus and textbooks are prescribed by SCERT / Director of School Education (Samacheer Kalvi Class 12). This site's bank is an English-language multiple-choice study adaptation for concept fluency — not an official translation, format simulation, or substitute for writing, practical, project, or oral evidence.
  • Time limit: Official theory sitting 10:00 a.m.–1:15 p.m. (about 3 hours writing after reading/verification) per March 2026 DGE timetable
  • Exam / certification fees: School candidates: DGE HSE scheme lists examination fee ₹200 for groups with practical subjects, plus Mark Certificate ₹20 and Service Charges ₹5 (Tamil-medium candidates and notified concession categories are often fee-exempt). Private (H) candidates: per-subject fees as notified (scheme text commonly cites subject + registration/mark/service components). Confirm current-session circulars on dge.tn.gov.in — fee tables can be updated by notification. Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Tamil Nadu HSE Second Year Zoology: Suggested Study Strategy

1Study from the current SCERT / Samacheer Kalvi Class 12 Zoology textbooks and the year's model question paper pattern released for DGE public exams.
2Practise both conceptual MCQs and the official long/short answer formats; this bank cannot replace writing or practical skill evidence.
3For calculation-heavy units, rework numerical problems with units and significant figures as used in the textbook examples.
4Use the official timetable to plan revision around your specific Part I / II / III sitting dates.
5After each practice set, log weak topic areas (by unit) and re-read those textbook chapters before retesting.

Frequently Asked Questions

What is the Tamil Nadu HSE Second Year Zoology exam?

It is the official Class 12 (Higher Secondary Second Year / +2) public examination paper in Zoology, conducted by the Directorate of Government Examinations (DGE), Tamil Nadu, under the State Board / Samacheer Kalvi syllabus.

How long is the official theory paper?

The March 2026 timetable schedules each theory sitting from 10:00 a.m. to 1:15 p.m., including question-paper reading and candidate particulars verification before the main writing period.

What is the passing score?

Minimum 35 out of 100 per subject overall under the new 600-mark HSE pattern (HSE_E.pdf), with additional floors: theory minimum 15/70 and must appear for practical for practical-bearing subjects. Confirm the current DGE result rules for your candidate category.

Is this practice bank the same format as the official paper?

No. Official papers use mixed written formats (and practicals where applicable). These 100 questions are an English-language multiple-choice study adaptation for knowledge and judgment practice only.

Where can I find the official timetable and scheme?

Download the public examination timetable and HSE scheme documents from the Directorate of Government Examinations website (dge.tn.gov.in), including the March 2026 HSE+2 timetable PDF.