Ib biology Study guides, Class notes & Summaries
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AQA AQA GCSE BIOLOGY 8461/2H Paper 2 Higher Tier *236G84612H/MS* Version: 1.0 Final *jun2384612H01* IB/M/Jun23/E21 8461/2H QUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
- Exam (elaborations) • 69 pages • 2024
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AQA 
GCSE 
BIOLOGY 
8461/2H 
Paper 2 Higher Tier 
*236G84612H/MS* 
Version: 1.0 Final 
*jun2384612H01* 
IB/M/Jun23/E21 8461/2H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
8 
9 
TOTAL 
Friday 9 June 2023 Afternoon Time allowed: 1 hour 45 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator. 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill in the boxes at the top of this page. 
...
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AQA AS BIOLOGY 7401/2 Paper 2 Version: 1.0 Final *JUN237401201* IB/M/Jun23/E9 7401/2QUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
- Exam (elaborations) • 50 pages • 2024
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AQA 
AS 
BIOLOGY 
7401/2 
Paper 2 
Version: 1.0 Final 
*JUN* 
IB/M/Jun23/E9 7401/2 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
TOTAL 
Thursday 25 May 2023 Morning Time allowed: 1 hour 30 minutes 
Materials 
For this paper you must have: 
• a ruler with millimetre measurements 
• a scientific calculator. 
Instructions 
• Use black ink or black ball-point pen. 
• Fill in the boxes at the top of this page. 
• Answer all questions. 
• You must answer the question...
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AQA A LEVEL BIOLOGY PAPER 1 2021.
- Exam (elaborations) • 41 pages • 2022
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AQA A LEVEL BIOLOGY PAPER 1 
2021. Describe the induced-fit model based on enzyme action and how an enzyme acts as a 
catalyst. 
[3 marks] 
. 2 Scientists investigated the action based on the enzyme ATP synthase. They made reaction 
mixtures each containing: 
• ATP synthase 
• buffer (to control pH) 
• substrates. 
One based on the substrates required within these reaction mixtures is inorganic phosphate (Pi). 
Tick ( ) one box to show which other substrate the scientists must add to the ...
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IB Biology: Classification Key Predicted Exam Questions And Correct Answers
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MetabolismAnabolism+catabolism. the chemical processes that occur within a 
living organism in order to maintain life. Enzymatic Reactions inside a living organism 
CarbonCarbon is an element with the atomic number 6, meaning it has four 
electrons in its outer shell. These electrons can form covalent bonds with carbon atoms or 
atoms of other elements. This allows a diversity of stable compounds to exist. 
LipidsA diverse group of Carbon containing macromolecules made up of carbon, 
hydroge...
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IB Biology SL — Topic 1 • Cell Biology with Complete Solutions
- Exam (elaborations) • 25 pages • 2024
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IB Biology SL — Topic 1 • Cell Biology 
 
with Complete Solutions 
 
Cell theory 1. All living things are composed of cells 
2. Cells are the smallest unit of life 
3. Cells only arise from pre-existing cells 
 
Striated muscle cell Exception to cell theory! 
 
→ Muscle cells fuse to form fibres that may be very long (>300mm) 
 
→ Consequently, they have multiple nuclei despite being surrounded by a single, continuous 
plasma membrane 
 
→ Challenges the idea that cells always funct...
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IB Biology Latest Update with Verified Solutions
- Exam (elaborations) • 30 pages • 2024
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IB Biology Latest Update with Verified 
 
Solutions 
 
genotype the alleles of an organism 
 
phenotype the characteristic of an organism 
 
dominant allele an allele that has the same effect on the phenotype when present in both 
homozygous and heterozygous states 
 
co-dominant alleles pair of alleles that both affect the phenotype when present in a 
heterozygote 
 
recessive alleles an allele that only has an effect on the phenotype when in homologous state 
 
locus the particular position on...
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IB Biology: Chapter 1 Latest 2024 Graded A+
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IB Biology: Chapter 1 Latest 2024 
 
Graded A+ 
 
cell theory - all living things are composed of cells 
- the cell is the smallest unit of life 
- cells only arise from pre-existing cells 
 
challenges to the cell theory - *striated muscle* challenges the idea that a cell has one 
nucleus 
- *giant algae* challenges the idea that cells must be simple in structure & small in size 
- *aseptate fungal hyphae* challenges the idea that a cell is a single unit 
 
functions of life - metabolism 
 
- r...
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IB Biology semester 1 Latest Version Graded A+
- Exam (elaborations) • 38 pages • 2024
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IB Biology semester 1 Latest Version 
 
Graded A+ 
 
Cells Smallest functional unit of an organism 
 
What are the principles of cell theory? 1. All living things are made of cells 
2. Cells are smallest unit of life 
3. Cells come from pre-existing cells 
 
What are the properties of life? Metabolism 
Reproduction 
Growth 
 
Response 
Excretion 
Homeostasis 
Nutrition 
 
Prokaryotic cells Single cell which has neither a distinct nucleus or organelles can be an 
organism (e.g. bacteria) 
 
Flage...
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IB BIOLOGY - HUMAN PHYSIOLOGY QUESTIONS AND ANSWERS ALREADY PASSED
- Exam (elaborations) • 51 pages • 2024
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IB BIOLOGY - HUMAN PHYSIOLOGY 
QUESTIONS AND ANSWERS ALREADY 
 
PASSED 
 
What is injestion? Ingestion is eating food 
 
What is Digestion? Passage of smaller molecules from the digestive 
 
What is Absorption? Passage of smaller molecules from the digestive system into the 
bloodstream or lymphatic system 
 
What is transport? The delivery of small molecules to tissues by the circulatory system 
 
What is the alimentary canal? The alimentary canal consists of organs through which food 
actually...
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IB Biology Review with Complete Solutions
- Exam (elaborations) • 254 pages • 2024
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IB Biology Review with Complete 
 
Solutions 
 
cell theory -All living things are composed of cells 
 
-cells come from preexisting cells 
 
-Cells are smallest unit of life 
 
Challenges to cell theory: muscle fibres -They are fused cells, so they're long and have 
multiple nucleus 
 
-challenges cells are autonomous units 
 
Challenges to cell theory: Giant algae -certain species may grow large 
 
-challenges idea cells are microscopic and larger organisms are composed of many 
 
Challenges ...