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Online Secondary Biology Tuition in Singapore: One-to-One and Small-Group Tutors for G3 Biology and Combined Science

G3 Biology spans fourteen topics, from cells and enzymes to the kidneys, hormones, genetics and ecosystems, and its papers expect exact explanations and careful reading of data. onlinetuition.sg matches Sec 3 and Sec 4 students with Biology tutors for live online lessons, one-to-one or in small groups, for G3 Biology or the Biology in G2 or G3 Science.

Request an Online Secondary Biology Tutor

For the school year
Class size
Subjects
Preferred lesson times

Biology is pre-selected. Free to request.

About Biology in the SEC

The SEC replaces the O-Level and N-Level from 2027, beginning with the cohort that entered Sec 1 in 2024. SEAB’s G3 Biology syllabus (K325) keeps the topics and papers of O-Level Biology (6093), last examined in 2026.

G3 Biology (K325)
Pure Biology, in three papers
Paper 1
40 multiple-choice questions, 1 hour (30%)
Paper 2
1 h 45 min, 80 marks (50%): structured questions ending with a free-response question and a data-based question of 8 to 12 marks, then a choice of one free-response question from two
Paper 3
Practical, 1 h 50 min, 40 marks (20%), with two or three compulsory questions
G3 Science (K327 and K328)
Biology is examined in its own 65-mark paper of 1 h 15 min (32.5%), with a shared multiple-choice paper and practical test
G2 Science (K224 and K225)
Biology has a 20-mark multiple-choice paper and a 30-mark structured paper, taken together in one 1 h 15 min session, and no practical exam

In the practical, students may test for food substances, carry out enzyme experiments, observe plant and animal specimens, and make clear, labelled line drawings that show the magnification.

Common Challenges Secondary Biology Students Face

Diffusion, Osmosis and Active Transport

Explaining each one with the right terms, then applying them to plant cells, root hairs and the gut.

Enzymes and Digestion

The lock and key hypothesis, the effects of temperature and pH, and where each enzyme acts in the digestive system.

Transport in Humans and Plants

The cardiac cycle, blood vessels, transpiration and translocation, where processes in different organs are easy to confuse.

Homeostasis and Co-ordination

Negative feedback, blood glucose control by insulin and glucagon, and the path of a reflex action, in the correct sequence.

Genetics and Inheritance

From DNA and protein synthesis to monohybrid crosses, where genetic diagrams have to be set out in full.

Data and Free-Response Questions

Paper 2 ends with a free-response question and a data-based question, and Section B is another free-response choice.

How Our Online Secondary Biology Tutors Help

Processes Drawn as They Are Explained

The tutor sketches the heart, a nephron or the neurones in a reflex action on a shared whiteboard, labelling each part as it comes up.

Exact Biological Terms

Short, regular practice on the terms each topic uses, so answers name the structure and its function precisely.

Genetic Diagrams Step by Step

Parental genotypes, gametes, offspring and ratios laid out the same way every time.

Reading Experimental Data

Graphs and tables from unfamiliar experiments, and how to describe a trend and then explain it.

Ready for the Practical

Planning investigations, recording results, drawing specimens and calculating magnification for Paper 3.

Pure or Combined, as Your Child Takes It

G3 Biology, or the Biology in G3 or G2 Science, with practice on the right papers.

Secondary Biology Topics Covered by Our Tutors

G3 Biology's fourteen topics in the syllabus's own words, under its four themes. The syllabus doesn't split them into Sec 3 and Sec 4.

Cells and the Chemistry of Life

  • Cell structure and organisation: plant and animal cells, and cell specialisation
  • Movement of substances: diffusion, osmosis and active transport
  • Biological molecules: carbohydrates, fats and proteins, and enzymes

The Human Body – Maintaining Life

  • Nutrition in humans · transport in humans, including the heart and cardiac cycle · respiration in humans
  • Excretion in humans: the kidneys and kidney dialysis
  • Homeostasis, co-ordination and response: hormonal and nervous control
  • Infectious diseases, including influenza and pneumococcal disease, and their prevention and treatment

Living Together – Plants, Animals and Ecosystems

  • Nutrition and transport in flowering plants: photosynthesis, transpiration and translocation
  • Organisms and their environment: energy flow, food webs, the carbon cycle and global warming, and conservation

Continuity of Life

  • Molecular genetics: the structure of DNA, from DNA to proteins, and genetic engineering
  • Reproduction: asexual reproduction, cell division, and sexual reproduction in flowering plants and humans
  • Inheritance: monohybrid crosses, variation and natural selection

Biology in Combined Science

G3 Science
Twelve topics; excretion, homeostasis and co-ordination, cell division, genetic engineering and natural selection are left out
G2 Science
Eight topics, from cells to nutrition and transport in plants, with no genetics, reproduction or ecology

Online Combined Science tuition

After Sec 4

H1 and H2 Biology build directly on O-Level Biology, taken alone or within a balanced science course, and are designed not to revisit it.

Online H2 Biology tuition

Online H1 Biology tuition

Key Secondary Biology Dates

Updated

Upcoming dates from MOE and SEAB, and the SEC pattern SEAB has set out. Exact SEC dates come in SEAB’s timetable.

O-Level 2026 results
13 to 15 January 2027 (tentative)
SEC practicals
Held before the written papers
SEC written papers
In one common period from October
SEC 2027 results
January 2028

Why Choose onlinetuition.sg for Secondary Biology Tuition?

G3 Biology and Combined Science

We match a tutor for the exact course your child takes, from G2 Science to G3 Biology.

Screened Biology Tutors

We screen each tutor for their qualifications, Biology results and teaching experience.

Small Groups, Same Syllabus

A group has up to 4 students at the same level and on the same Biology syllabus.

Continuity Week to Week

Your child keeps the same tutor, who knows what was covered last time.

Try a Lesson First

Every student starts with a trial lesson before you decide on weekly lessons.

No Agency Fees

There are no agency fees, and requesting a Secondary Biology tutor is free.

Frequently Asked Questions About Secondary Biology Tuition

Thinking of Secondary Biology Tuition?

Is G3 Biology the Same as O-Level Biology?

Yes, in its topics and papers. G3 Biology (K325) is the SEC course after O-Level Biology (6093), with the same fourteen topics and three papers.

How Is Pure Biology Different From the Biology in Combined Science?

G3 Biology covers fourteen topics in three papers of its own. In G3 Science, Biology has twelve topics and one paper of its own; in G2 Science it has eight topics.

Why Does My Child Know the Content but Still Lose Marks?

Biology answers need the exact term and a full explanation, not just a description. A tutor shows how mark-worthy answers are built, topic by topic.

Is There a Practical Exam in Secondary Biology?

At G3, yes: Paper 3 in G3 Biology, or a practical test shared with the other science in G3 Science. G2 Science has no practical exam, though students carry out practical work in school.

When Should My Child Start Biology Tuition?

Often in Sec 3, while the cell and transport topics are new. Students in Sec 4 can also start, to focus on exam practice before the SEC.

Getting a Tutor

How Do I Request a Biology Tutor?

Fill in the free form above with your child's level and preferred times; the full request form also asks whether they take Biology at G2 or G3. We'll get back to you on WhatsApp.

Who Will Teach My Child?

A part-time or full-time tutor, a current or former school teacher, or an undergraduate, screened for their qualifications, results and teaching experience.

When Will You Get Back to Us?

We aim to reply within one working day, and the first lesson is a trial.

Lessons

How Do Online Biology Lessons Work?

Lessons are live on Zoom with cameras on. The tutor draws and labels diagrams on a shared screen or digital whiteboard, and works through questions with your child.

How Long Are Lessons?

Usually 1.5 or 2 hours, on the same day and time each week.

Can I Sit In on a Lesson?

Yes, parents are welcome. Try to let your child answer on their own, since working independently is part of learning.

Others

How Much Does Secondary Biology Tuition Cost?

Fees depend on the level and class size. We confirm the fee on WhatsApp before the first lesson.

Do You Charge Agency Fees?

No, there are no agency fees.

How Do Payment and Stopping Work?

Payment is by PayNow. To stop, give one month's notice, out of courtesy to the tutor.

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