Free Edexcel IAL A2 Biology Unit 4 Trial Lesson (WBI14)
Explore Photosynthesis Light-Dependent Reactions with one complete Unit 4 video, a 10-page notes flipbook, a 16-question interactive Biology quiz, two downloadable question PDFs, classified and advanced-practice flipbooks, six worked exam questions and a final understanding check—all open to try now.
What’s included in this free trial
- One complete Unit 4 trial video on photosynthesis and the light-dependent reactions
- A 10-page notes flipbook for the lesson
- 16 questions in each quiz attempt, plus a final understanding check
- Three lesson-specific trial flipbooks and six worked exam questions
- No sign-up, no card and no membership — everything above opens straight away
Photosynthesis light-dependent reactions trial video
Build chloroplast structure, photosynthetic pigments, absorption and action spectra, chromatography and Rf values, then follow photolysis, electron transfer, proton gradients and photophosphorylation in one complete Edexcel IAL Biology Unit 4 lesson.
Key takeaways
Searches the words spoken in this lesson — e.g. “phosphoric” or “pH scale”. Punctuation doesn’t matter.
Tip: pause after each stage and practise drawing the thylakoid membrane, electron flow, proton gradient and ATP synthase before continuing.
Photosynthesis light-dependent reactions trial notes
Review the 10-page Photosynthesis notes without leaving this page. Select the cover to open the trial flipbook viewer.
Select the cover to open the Photosynthesis Light-Dependent Reactions trial notes in the popup viewer.
Photosynthesis Light-Dependent Reactions interactive biology quiz
Check your understanding of chloroplast structure, pigments, spectra, chromatography, photolysis, electron transport, chemiosmosis and photophosphorylation. This focused trial quiz is open and gives immediate practice without requiring a membership.
Advanced Practice
Everything in this section is trial content. Open the classified and advanced-practice flipbooks, download both Unit 4 question PDFs for offline practice, then explore six worked light-dependent-reaction questions below.
Photosynthesis classified questions
Practise chloroplasts, photosynthetic pigments, spectra, chromatography and the light-dependent reactions with classified Edexcel IAL Biology Unit 4 questions.
Photosynthesis advanced practice
Challenge your understanding with deeper, examiner-focused Photosynthesis questions and fully worked Unit 4 practice.
Download the Photosynthesis Unit 4 question packs
Save the PDFs to your device or print them for handwritten exam practice. Both Photosynthesis downloads are open to students without signing in.
Photosynthesis classified past-paper questions
27 pages of Edexcel IAL Biology Unit 4 Photosynthesis questions, organised for focused exam practice.
Download 27-page questions PDFAdvanced Photosynthesis past-paper questions
36 pages of advanced, fully worked Unit 4 Photosynthesis questions for independent revision.
Download 36-page advanced questions PDFFinal understanding check
When you have watched, revised and practised, finish with this separate Photosynthesis Light-Dependent Reactions checkpoint.
Photosynthesis: Light-Dependent Reactions
Complete 10 questions in about 15 minutes. Your result appears instantly, so you can see whether you are ready to move on or which ideas need one more review.
Take the final Photosynthesis LDR quizEdexcel IAL A2 Biology Unit 4 trial FAQs
Quick answers about this free Photosynthesis Light-Dependent Reactions preview.
Is this Edexcel IAL A2 Biology Unit 4 trial really free?
Yes. The complete trial video, 16-question quiz attempt, 10-page notes, two downloadable question PDFs, classified and advanced-practice flipbooks, six worked exam questions and the 10-question final check are open without a course membership or sign-in.
Which Edexcel IAL Biology unit does this lesson support?
The lesson supports Edexcel International Advanced Level Biology Unit 4 (WBI14), Energy, Environment, Microbiology and Immunity.
What does the trial lesson cover?
It covers chloroplast structure, photosynthetic pigments, absorption and action spectra, chromatography and Rf values, photolysis, electron transport, proton gradients, ATP synthase and photophosphorylation.
Is this Edexcel IAL A2 Biology WBI14 trial updated for the 2026 exams?
Yes. The trial lesson and the full course both follow the current Edexcel IAL A2 Biology WBI14 specification for the 2026 examinations.
Who teaches the lessons?
Every video, note and worked answer is made by Hosni Showike, Head of Science at Nottingham British School in Kuwait, with more than 21 years of teaching experience, a dual master’s degree in Biochemistry and Biotechnology from the University of Brussels (2003) and an international teaching certificate from the United States. He is the author of eight published textbooks with more than 20,000 copies sold. The recording you watch in this trial is exactly the one paid students see — nothing is cut down for the free version.
What is in the full A2 Biology course (Units 4–6), and what does it cost?
The IAL A2 Biology Complete Course covers Units 4, 5 and 6: recorded lectures, the complete notes library, topic quizzes and the full solved past-paper collections. It is $250. Unit 4 on its own is $100, and the all-units Biology course (AS and A2 together) is $400. The product page always shows the current price and any offer.
Are solved past papers included in the full course?
Yes. The full course includes the classified and full solved past papers with written answers and video explanations. The worked questions in this trial come from that same collection.
Is this suitable for self-study or homeschooling?
Yes. Every lesson is recorded, so you can work at your own pace, repeat any explanation and revise a topic the night before a test. Parents comparing online tutors can use this free trial to see the teaching before paying for anything.
Who this free Edexcel IAL A2 Biology course online trial is for
This is a free trial of the Edexcel IAL A2 Biology course online for Unit 4, WBI14. You get one complete video on photosynthesis and the light-dependent reactions, a 10-page notes flipbook, a 16-question quiz, three trial flipbooks and six worked exam questions. No sign-up and no card needed, so you can see the teaching before you spend anything.
Who is this for?
This trial is built for students sitting any exam session in the coming two years, and for anyone who wants to see how A2 Biology is actually taught before committing. It suits students revising alongside school, students self-studying without a teacher, homeschooling families who need a complete recorded course, and parents comparing online tutors who would rather watch a full lesson than read a sales page. Because every lesson is recorded, you can pause, repeat a difficult explanation and come back to it the night before a test.
How to get the most out of this free lesson
Watch the lesson first without taking notes, then run the quiz cold — the score tells you what actually stuck rather than what felt familiar. After that, open the worked past-paper questions and cover the answer before you read it. Marks in A2 Biology are usually lost in the wording, not the science, so comparing your phrasing against a full model answer is the fastest way to gain them.
What the full course includes
- Recorded lectures covering every topic in the specification, taught in the same style as this trial
- The complete notes library, written to be revised from rather than skimmed
- Solved past papers with full written answers and video explanations, classified by topic and available as full papers
- Topic quizzes and flashcards that mark every answer instantly, so you find weak spots before the examiner does
- Access on phone, tablet and laptop — pick up on any device where you left off
For the full unit breakdown, the specification and the notes library, see the A2 Biology course page on chem-bio.info. It lists the topics, the exam structure and everything that comes with the paid course, so you can compare it against the free lesson you have just tried.
Ready for the complete Edexcel IAL A2 Biology course?
Continue to the full A2 Biology Learning Hub for every Unit 4–6 lesson, the complete notes library, quizzes and solved past-paper collections.
More free trial lessons
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