Ib cell biology Study guides, Class notes & Summaries
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IB Biology Latest Update with Verified Solutions
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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 Review with Complete Solutions
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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 ...
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AQAGCSE COMBINED SCIENCE: TRILOGY 8464/B/1F Biology Paper 1F Version: 1.0 Final *JUN238464B1F01* IB/M/Jun23/E5 8464/B/1F QUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
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GCSE 
COMBINED SCIENCE: TRILOGY 
8464/B/1F 
Biology Paper 1F 
Version: 1.0 Final 
*JUN238464B1F01* 
IB/M/Jun23/E5 8464/B/1F 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
TOTAL 
Tuesday 16 May 2023 Morning Time allowed: 1 hour 15 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. 
• Answer al...
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IB Biology Unit 1 Latest Update Graded A+
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IB Biology Unit 1 Latest Update 
 
Graded A+ 
 
Cell theory 3 main principles All organisms are composed of one or more cells 
cells are the smallest units of life 
all cells come from pre-existing cells 
 
7 functions of life (MR H GREN) 
metabolism 
reproduction 
homeostasis 
growth 
excretion 
 
response 
nutrition 
 
Paramecium unicellular membrane of the kingdom known as Protista. Look at powerpoint on 
isa247 to see how this organism displays the functions of life. 
 
chlorella single-cell...
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/1F Biology Paper 1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
- Exam (elaborations) • 67 pages • 2024
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/1F Biology Paper 
1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] 
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. 
• Answer all questions in the spaces provided. 
• If you need extra space for your answer(s), use the lined pages at the end of 
t...
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/1F Biology Paper 1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
- Exam (elaborations) • 67 pages • 2024
- Available in package deal
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- $7.99
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/1F Biology Paper 
1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] 
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. 
• Answer all questions in the spaces provided. 
• If you need extra space for your answer(s), use the lined pages at the end of 
th...
-
All IB Biology Processes Latest Update with Verified Solutions
- Exam (elaborations) • 84 pages • 2024
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All IB Biology Processes Latest Update 
 
with Verified Solutions 
 
Stem Cell Therapy 1. triggering the differentiation of stem cells into desired cell type 
2. surgical implantation of differentiated cells into patients tissue 
3. suppression of immune system so they do not get destroyed 
4. monitoring so they are not cancerous 
 
eg. Stagardt's Disease (old retina cells --> new retina cells) 
Leukemia (bone marrow transplant) 
 
Somatic cell nuclear transfer - creation of embryonic clones...
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IB Biology Chapter 2 Latest 2024 Graded A+
- Exam (elaborations) • 11 pages • 2024
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IB Biology Chapter 2 Latest 2024 
 
Graded A+ 
 
Vitalism Idea that living organisms are fundamentally different from non living things 
 
Most frequently occurring elements Oxygen 65% 
Carbon 19% 
Hydrogen 10% 
Nitrogen 3% 
 
Other elements Calcium 1.5% 
 
Phosphorus 1% 
Iron 0.7% 
Sulfur 0.25% 
Sodium 0.15% 
 
Molecular biology Science that aims to explain living processes in terms of chemical 
substances 
 
Synthesis of urea Discovered in human urine in the 18th century 
Organic compound synt...
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IB Biology Paper 1 Questions And Answers Already Passed
- Exam (elaborations) • 11 pages • 2024
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IB Biology Paper 1 Questions And 
 
Answers Already Passed 
 
Prokaryote or Eukaryote in paramecium? Compartments in the cell indicates that it's a 
eukaryote 
 
Property of water which makes it suitable for living? Thermal 
 
Watson and Crick discovery about DNA DNA is double helix 
 
What occurs in meiosis but not in mitosis? Homologous chromosomes pair up 
 
Variation within a population Fertilization and mutation 
 
properties of stem cells they can differentiate 
 
phospholipid bilayer the...
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IB Biology Cell Structure Latest Version Graded A+
- Exam (elaborations) • 3 pages • 2024
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IB Biology Cell Structure Latest Version 
 
Graded A+ 
 
Nucleolus Structure: Darker spot within nucleus 
Function: Ribosomal RNA synthesis 
 
Nucleus Structure: Large spot within cell 
Function: Genetic material storage, controls cell processes 
 
Ribosomes Structure: Small spheres 
Function: Building proteins 
 
Vesicle Structure: Membrane bound container 
 
Function: Move material around 
 
Rough ER Structure: Folded, attached to nucleus, ribosomes attached 
Function: Proteins can be made lik...
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