IB Biology SL and HL textbook cover: Photon Guidebook

Photon Guidebook · 2026 Edition

IB Biology SL and HL textbook: Photon Biology

Name: Photon Biology: Study Guide for the IB Diploma (SL & HL)
Price: 150.00 SGD
Availability: InStock
Author: Ejaz Ahmad
ISBN: 978-981-91022-9-7

By Ejaz Ahmad, IB-certified teacher · Compare prices

The whole course in one volume. Each topic is explained with illustrated panels and structures, then checked with questions modelled on the real papers, from a single idea to a full written answer.

1 volume
40 topics
594 pages
Browser e-book
Print: coming soon

Read the free sample →S$150

Free sample: Topic C1.1, Enzymes and metabolism. Full title: Photon Biology: Study Guide for the IB Diploma (SL & HL), with the Photon Academy team.

Who it's for

Who this IB Biology SL and HL textbook is for

Written for students who:

SL and HL students on the current course (Themes A to D) who want one book for theory, practice and the exam.
Students who follow the biology in class but lose marks turning it into a precise written explanation.
Students planning an investigation who want to see how evidence is recorded, processed and judged.

Also inside

Beyond the topics

After the topics there is a Tools section on measurement, uncertainty and graphs, a section on scientific inquiry, a chapter on making your answers assessable, short answers to the practice questions and a full index.

Worked solutions to the practice questions are free on the publisher's site: IB Biology SL and HL worked solutions.

How each chapter is built

The same four-part pattern runs through the book, so you always know where you are.

Illustrated explanationsEach topic is taught in short illustrated panels that build the biology one idea at a time, with diagrams, graphs and data, before any exam question appears.
How the course asks itA profile of how each topic is examined on the current course, so you can see which kinds of question carry the marks before you start practising.
Practice at three levelsBasic, Tutorial and Advanced questions, written in the style of the real papers, with short answers in the book and full worked solutions online.
Tools and inquiryMeasurement, uncertainty, graphs, statistics and the logic of an investigation, with worked examples of recording and processing evidence.

IB Biology SL and HL contents

40 topics, 594 pages.

Themes A to D, Tools and inquiry, the exam, answers and index · 594 pages

A1.1Water
A1.2Nucleic acids
A2.1Origins of cells
A2.2Cell structure
A2.3Viruses
A3.1Diversity of organisms
A3.2Classification and cladistics
A4.1Evolution and speciation
A4.2Conservation of biodiversity
B1.1Carbohydrates and lipids
B1.2Proteins
B2.1Membranes and membrane transport
B2.2Organelles and compartmentalization
B2.3Cell specialization
B3.1Gas exchange
B3.2Transport
B3.3Muscle and motility
B4.1Adaptation to environment
B4.2Ecological niches
C1.1Enzymes and metabolism
C1.2Cell respiration
C1.3Photosynthesis
C2.1Chemical signalling
C2.2Neural signalling
C3.1Integration of body systems
C3.2Defence against disease
C4.1Populations and communities
C4.2Transfers of energy and matter
D1.1DNA replication
D1.2Protein synthesis
D1.3Mutation and gene editing
D2.1Cell and nuclear division
D2.2Gene expression
D2.3Water potential
D3.1Reproduction
D3.2Inheritance
D3.3Homeostasis
D4.1Natural selection
D4.2Stability and change
D4.3Climate change
+Tools and inquiry
+The exam
+Short answers
+Index

Look inside the IB Biology SL and HL e-book

Eight real pages, shown exactly as the e-book displays them. Tap any page to open it at full size, or read the whole sample.

The opening page of Topic C1.1, Enzymes and metabolism

Illustrated panels on how temperature, pH and substrate concentration change enzyme rate

HL-only material is flagged, here the inhibitors of enzymes

How the current course examines enzymes and metabolism

Basic practice: quick checks on the core ideas

Tutorial practice: building a complete answer

Tools: scale bars and magnification, from a measurement to a result

From the chapter on how the papers are set and marked

Buy the IB Biology SL and HL e-book

Payments are handled by Photon Academy (Singapore), the publisher.

Volume	Covers	Pages	ISBN (e-book)	Price	Buy
The e-book	Themes A to D, Tools and inquiry, the exam, answers and index	594	978-981-91022-9-7	S$150 SGD, 2 years	Buy the e-book →

How buying works

The Buy button opens the publisher's HitPay checkout. You sign in first, so the book is linked to your account, then pay by card, Apple Pay or Google Pay. Outside Singapore, use a card: PayNow is a Singapore bank transfer. Your receipt is emailed to you.

The book opens in your browser as soon as payment clears.

The author

Written by Ejaz Ahmad

IB-certified for Maths AA HL and Physics HL, teaching the IB since 2015, with more than 1,000 IB students. More about Ejaz Ahmad · About Photon Resources

Teaching IB? See Worksheet Studio for schools.

Questions

How do I read the e-book?

In the page-turn reader in any up-to-date browser on a phone, tablet or laptop. It has a contents navigator and search, and there is nothing to install.

How long do I keep access?

Two years from purchase. Your access is tied to the Google account you sign in with when you pay.

Can I download or print it?

No. It is a personal licence read online, and each page is watermarked with the buyer's account. A printed edition is in preparation.

Are these real IB past paper questions?

No. Every question and worked solution is original, written by Photon Academy in the style of the exam. The book does not reproduce IB papers, markschemes or booklets.

Who handles the payment?

Photon Academy in Singapore, the publisher, through a secure HitPay checkout. Outside Singapore, pay by card, Apple Pay or Google Pay: PayNow is a Singapore bank transfer and only works from a Singapore bank. Prices are in Singapore dollars and your card provider converts them. Your receipt is emailed to you.