Ib biology topic 1 Study guides, Class notes & Summaries
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Summary Study Notes IB HL Biology
- Class notes • 44 pages • 2024
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Concise study notes from 2022 IB HL Biology. Attained a Level 7 in exam. 
 
CORE: 
Topic 1: Cell Biology 
Topic 2: Molecular Biology 
Topic 3: Genetics 
Topic 4: Ecology 
Topic 5: Evolution and Biodiversity 
Topic 6: Human Physiology 
 
ADDITIONAL HIGHER LEVEL: 
Topic 7: Nucleic Acids 
Topic 8: Metabolism, Cell Respiration and Photosynthesis 
Topic 9: Plant Biology 
Topic 10: Genetics and Evolution 
Topic 11: Animal Physiology
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IB Biology Topic 1: Cell Biology Questions and Answers Already Passed
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IB Biology Topic 1: Cell Biology 
Questions and Answers Already Passed 
 
What does cell theory state? That cells are the smallest possible unit of life and that living 
organisms are made up of cells. 
 
What are unicellular organisms? Give two examples Unicellular organisms are organisms 
with only one cell, such as Paramecium and Chlamydomonas. In unicellular organisms the one 
cell carries out all of the functions of life. 
 
Why are large organisms multicellular? Because of surface area to ...
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IB Biology Topic 1: Cell Biology Latest Update Graded A
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IB Biology Topic 1: Cell Biology Latest 
 
Update Graded A 
 
Cell theory The theory that cells form the fundamental structural and functional units of all 
living organisms. 
 
Differentiation The expression of a particular gene(s) and not others in order for cell 
specialisation. 
 
Emergent properties The idea that the sum of an organism is more than the parts interacting 
and combining. Living things become more complex as they move (from individual cells to 
organ systems). 
 
Multicellular...
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IB Biology Topic 1 Exam With Complete Solution Graded A+
- Exam (elaborations) • 5 pages • 2023
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IB Biology Topic 1 Exam With Complete Solution Graded A+...
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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 Topic 4 : Ecology Latest Version Graded A+
- Exam (elaborations) • 11 pages • 2024
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IB Biology Topic 4 : Ecology Latest 
 
Version Graded A+ 
 
Ecology The science of the relationships between organisms and their environments. 
 
Organism an individual living thing that uses energy, reproduces, responds, grows, and 
develops 
 
Species a group of similar organisms that can breed and produce fertile offspring 
 
Population group of individuals of the same species that live in the same area 
 
Community all living, or biotic, things in an area 
 
Ecosystem all biotic (living) and...
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IB Biology - Topic 3 – Genetics Latest 2024 Graded A+
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IB Biology - Topic 3 – Genetics Latest 
 
2024 Graded A+ 
 
Define gene. A heritable factor that consists of a length of DNA (not an entire chromosome) 
and influences a specific characteristic 
 
Define allele. Various forms of a gene 
 
Define locus. The position a gene occupies on one type of chromosome 
 
Define genome. The whole genetic information of an organism 
 
How do alleles differ from one another? By a few differences in DNA base sequence 
 
What is the genome size (million base p...
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IB SL BIOLOGY TOPIC 1 CELL BIOLOGY QUESTIONS AND ANSWERS COMPLETE STUDY GUIDE 2023
- Summary • 5 pages • 2023
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IB BIOLOGY TOPIC 1 CELL 
BIOLOGY QUESTIONS AND 
ANSWERS COMPLETE 
 STUDY GUIDE 2023 
IB Biology Topic 1: Cell Biology 
1. Cell theory: The theory that cells form the fundamental structural and functional 
units of all living organisms. 
2. Differentiation: The expression of a particular gene(s) and not others in order 
for cell specialisation. 
3. Emergent properties: The idea that the sum of an organism is more than the 
parts interacting and combining. Living things become more complex as they...
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IB Biology HL Topic 8 Latest Version Graded A+
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IB Biology HL Topic 8 Latest Version 
 
Graded A+ 
 
Oxidation involves the loss of electrons from an element; frequently involves gaining 
oxygen or losing hydrogen 
 
Reduction involves a gain of electrons; frequently involves losing oxygen or gaining 
hydrogen 
 
Glycolysis first stage of cell respiration; in the cytoplasm, one hexose sugar is converted into 
2 3-carbon atom compounds (pyruvate) with a net gain of 2 ATP and 2 NADH + H 
 
Phosphorylation 2 phosphate groups are added to a molec...
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IB SL BIOLOGY TOPIC 3 GENETICS COMPLETE STUDY GUIDE 2023.
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IB BIOLOGY TOPIC 3 
GENETICS COMPLETE 
 STUDY GUIDE 2023. 
HKEXCEL LTD. 1 
Topic 3.1 – Genes 
Genetics 
x It is the study of variation and inheritance. The basic unit of inheritance is a gene. 
Gene 
x A gene is defined as a heritable factor that controls a specific characteristic for an organism, or a 
section of DNA that codes for the formation of a polypeptide. 
x A gene occupies a specific position on a chromosome. 
x A typical animal or plant cell nucleus contains thousands of genes. The ...
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Complete IB Biology Topic 1-6 Notes
- Summary • 116 pages • 2022
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Complete, clear and concise notes for Topic 1-6 of the IB Biology course by a 44 student (7 for biology), structured according to the syllabus requirements to ensure all necessary information is covered, and including all needed diagrams and possible long answers