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Q29700_s25_qp_14Q69700_s25_qp_12Q19700_s25_qp_14
6What is the order of size of cell structures?
| largest ⟶ smallest | ||||
|---|---|---|---|---|
| A | centrioles | ribosomes | lysosomes | nucleoli |
| B | centrioles | nucleoli | lysosomes | ribosomes |
| C | nucleoli | lysosomes | centrioles | ribosomes |
| D | nucleoli | centrioles | ribosomes | lysosomes |
Mark scheme · 9700_s25_ms_12
| Question | Answer | Marks |
|---|---|---|
| 6 | C | 1 |
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444 questions
Q29700_s25_qp_14Q69700_s25_qp_14Q19700_s25_qp_14Q59700_s25_qp_12Q39700_w24_qp_11
0 selected
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ExplanationQuestion 6
This question discriminated well. The most common incorrect response was B, chosen by candidates who placed nucleoli before lysosomes; a nucleolus (1–3 µm) is larger than a lysosome (0.2–0.5 µm).
Ribosomes (≈25 nm) are the smallest of the four structures listed, which rules out A and D immediately. The correct answer was C.
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Difficulty
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Number of questions55
Biology · Paper 15 questions · All levels · All years Generating Completed
Question paper.pdf Mark scheme.pdf
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Biology · Paper 1Cell structure · Hard · 2023–2025Answered 3 of 10
Question 4
4 Which process moves glucose into the cells lining the small intestine against a concentration gradient?
Question 5
5 Which organelle is the site of aerobic respiration?
Quiz complete8 / 1080%
✓Question 1Cell structureYou: B✗Question 2EnzymesYou: A✓Question 3Cell membranes and transportYou: B✓Question 4Cell structureYou: C
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128 results for “water potential of the solution”Biology 9700 · Paper 1 · Q14
A plant cell is placed in a solution with a lower water potential than the cell sap. Which statement describes what happens?
9700_s24_qp_12 · Cell membranes and transportBiology 9700 · Paper 2 · Q3(b)Explain, in terms of water potential, why red blood cells burst when placed in distilled water.
9700_w23_qp_22 · Cell membranes and transportBiology 9700 · Paper 1 · Q11Potato cylinders were left in sucrose solutions. At which concentration is the water potential of the solution equal to that of the potato?
9700_m24_qp_12 · Cell membranes and transportQuestion9700_s24_qp_12
14A plant cell is placed in a solution with a lower water potential than the cell sap. Which statement describes what happens?Athe cell gains water by osmosisBthe cell loses water by osmosisCwater enters by active transportDthere is no net movement of water
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I enjoyed the range of subjects to choose from, especially the not so popular ones such as further maths. it's very difficult to find topicals for those so thank you for that. I like that you are able to look at the direct mark scheme from the question, really gives you lots of control, and rare to find. it is a really nice experience and I couldn't have completed my A-levels without this website and I will be sharing this with more people. Thank you again :)
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Aug 22, 2026
I love how Open past paper was very easy to use and study for my exams as it has topical past papers. I feel like due to open past papers ive been performing good in my class tests. I recently had my AS test and I used open past papers for it. If I could suggest anything maybe I would try adding a video to that specific question on how to solve it since some users wont understand the process of getting the answer from the marking scheme.
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Aug 22, 2026
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Oct 1, 2025
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I decided to subscribe because I really liked the feature that allows users to generate topical worksheets from past-year papers, along with the corresponding mark schemes. I found this especially useful for targeted revision and practice.
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Aug 22, 2026
I just really like the way you can create topical papers for multiple topics and how much you can personalise this, I couldn’t find it anywhere else.
Aarya
Aug 22, 2026
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Aug 24, 2025
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Oct 21, 2025
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Isi
Mar 31, 2026
brilliant collection and fast topical maker
Vihaan
Sep 24, 2025
It really good, if I was to give one thing that could be added it would be to create a section where you can see what questions you got wrong and which ones you got right in order to see which topics you need to spend more time on, or just which sections within the topic you are struggling with.
Rachel
Dec 5, 2025
its really good!! but i think it would be nice if you could collapse the section which shows the subject code, question and answer in the topical questions area. keep it up!!
Mariam
Aug 26, 2025
Each topic has numbered questions! So I understand how many more do I have to solve AND which topic comes more in question paper.
Zareen
Aug 25, 2025
I like the convenience of being able to find question and answers from official past papers on syllabus topics
M3men
Aug 24, 2025
i like the fact that it shows where every question comes from.id like to be able to download topicals as pdfs
Remote69
Oct 24, 2025
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Bianca
Oct 18, 2025
gives me questions from segregated topics from actual past papers, along with the marking scheme
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Oct 21, 2025
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Malluch
Dec 3, 2025
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Precious
Feb 2, 2026
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Advay
Oct 5, 2025
I like direct answers to every question being provided
Varvara
Sep 19, 2025
amazing 10/10 i hope you guys continue this service
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Mar 10, 2026
Really good for studying a subject topic by topic
patpaper
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I like it because itis organized updated and free
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Aug 21, 2026
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Jan 24, 2026
it is soo clear and straight and i like that
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Apr 22, 2026
I like that the topical qns are secluded
Haasini
Sep 1, 2025
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Apr 8, 2026
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HussainFB
Oct 3, 2025
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Sajjad
Nov 21, 2025
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Ibrahim
Oct 26, 2025
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Apr 18, 2026
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Nov 13, 2025
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We cover the major A-Level and IGCSE boards, with questions sorted by topic for every paper. New subjects and papers are added regularly, so if something's missing today it's likely on the way.
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