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Edexcel AS/A level Biology B Student Book 1

Edexcel AS/A level Biology B Student Book 1

Ann Fullick

(2016)

Additional Information

Book Details

Abstract

Created for the new 2015 OCR AS and A level specifications, our new Student Books cover the topics comprehensively, developing scientific thinking in your students, providing them with a deep understanding of the subject and creating confident, independent scientists.

Table of Contents

Section Title Page Action Price
Cover Cover
Contents 4
How to use this book 6
Topic 1: Biological molecules 8
Chapter 1.1: Chemistry for life 8
1: Chemistry for life 10
Ionic and covalent bonding 10
The importance of inorganic ions 11
The chemistry of water 12
The importance of water 12
Exam-style questions 14
Chapter 1.2: Biological molecules 1 16
1: Carbohydrates 1 – monosaccharides and disaccharides 18
What are organic compounds? 18
Carbohydrates 18
2: Carbohydrates 2 – polysaccharides 21
Carbohydrates as energy stores 22
Carbohydrates in plants 23
3: Lipids 25
Fats and oils 25
The nature of lipids 26
Phospholipids 27
4: Proteins 28
Amino acids 28
Bonds in proteins 28
Protein structure 29
Fibrous and globular proteins 30
Conjugated proteins 30
Thinking Bigger: Trehalose - A Sugar for Dry Eyes? 32
Exam-style questions 34
Chapter 1.3: Biological molecules 2 36
1: Nucleotides and ATP 38
Nucleotides 38
ATP 38
2: Nucleic acids 40
Building the polynucleotides 40
3: How DNA works 42
Uncovering the mechanism of replication 42
How DNA makes copies of itself 43
4: The genetic code 44
What is the genetic code? 44
Cracking the code 44
5: DNA and protein synthesis 47
Different types of RNA 47
Protein synthesis 48
6: Gene mutation 50
Different types of mutations 50
How gene mutations can affect the phenotype 50
Exam-style questions 52
Chapter 1.4: Enzymes 54
1: Enzymes 56
What is an enzyme? 56
2: How enzymes work 58
How do enzymes work? 58
Measuring reaction rate 59
What do we know about enzymes? 60
3: Enzyme inhibition 62
Reversible inhibition of enzymes 62
Irreversible inhibition of enzymes 62
End-product inhibition and the regulation of the cell 63
Thinking Bigger: Raw Enzymes-Really? 64
Exam-style questions 66
Topic 2: Cells and viruses 68
Chapter 2.1: Eukaryotic cells 68
1: Observing cells 70
Discovering cells 70
Microscopes 71
The electron microscope 72
2: Cell membranes 74
Membranes in cells 74
The structure of membranes 74
3: Eukaryotic cells 1 - common cellular structures 76
The characteristics of eukaryotic cells 76
The typical animal cell 77
The nucleus 77
Mitochondria 77
The centrioles 78
The cytoskeleton 78
Vacuoles 78
4: Eukaryotic cells 2 – protein transport 80
80S and 70S ribosomes 80
Rough and smooth endoplasmic reticulum 80
The Golgi apparatus 81
Lysosomes 81
5: Eukaryotic cells 3 – plant cell structures 83
The plant cell wall 84
Plasmodesmata 84
6: Eukaryotic cells 4 – plant organelles 86
Permanent vacuole 86
Chloroplasts 87
Amyloplasts 87
7: The organisation of cells 88
Tissues 88
Organs 89
Systems 89
Exam-style questions 90
Chapter 2.2: Prokaryotic cells 92
1: Prokaryotic cells 94
The structure of bacteria 94
Gram staining and bacterial cell walls 95
Antibiotics and bacterial cell walls 96
Alternative ways of classifying bacteria 97
2: Viruses 98
Viruses 98
The structure of viruses 98
Classifying viruses 98
How viruses reproduce 99
DNA virus replication 99
RNA virus replication 99
Viruses and disease 101
3: Controlling viral infections 102
The spread of viral diseases 102
Treating viral diseases 102
Preventing viral disease 102
The development of new medicines 104
Speeding up the process 104
Ethical implications 104
Thinking Bigger: Ebola - A Deadly Virus 106
Exam-style questions 108
Chapter 2.3: Eukaryotic cell division - mitosis 110
1: The cell cycle 112
What are chromosomes? 112
The cell cycle 112
2: Mitosis 114
The stages of mitosis 114
3: Asexual reproduction 117
Strategies for asexual reproduction 117
Topic 3: Classification 150
Chapter 3.1: Classification 150
1: Principles of classification 152
The background to biodiversity 152
Why classify? 152
The history of taxonomy 152
The main taxonomic groups 152
The binomial system 153
2: What is a species? 154
The concept of species 154
Other definitions of species 155
Limitations of species models 156
Identifying a species 157
3: Identifying individual species 158
The importance of DNA 158
The caviar con 158
DNA barcodes 158
4: New evidence for evolution 160
Fossil DNA and human evolution 160
DNA, lice and human evolution 160
New models support old theories 161
5: Domains, kingdoms or both? 162
Biochemical relationships 162
More biochemical relationships 163
Two domains or three? 163
How many kingdoms? 167
Thinking Bigger: Taking Advantage Of Change 168
Exam-style questions 170
Chapter 3.2: Natural selection 172
1: Evolution and adaptation 174
Observing evolution 174
The theory of evolution 174
Neo-Darwinism - evolution in the twenty-first century 174
Adaptation to a niche 175
Adaptations for survival 176
2: Natural selection in action 178
Oysters adapting to change 178
Natural selection in moths 178
Selecting for reproductive success 179
Directional selection 180
3: The evolutionary race between pathogens and medicines 181
Beating bacteria, step 1 181
Bacteria fight back 181
Beating bacteria, step 2 181
What does the future hold? 182
4: Speciation 183
Isolation and speciation 183
Isolating mechanisms 183
Allopatric speciation 183
Adaptive radiation 184
Sympatric speciation 185
Cichlid fish in the African lakes 186
Cichlid speciation 186
Fear for the future 187
Thinking Bigger: Reviving the Quagga 188
Exam-style questions 190
Chapter 3.3: Biodiversity 192
1: The importance of biodiversity 194
Defining biodiversity 194
Why is biodiversity important? 194
Assessing biodiversity at the species level 195
Measuring biodiversity 197
How biodiversity varies 198
When to measure biodiversity? 198
2: Biodiversity within a species 199
Gene and allele frequency 199
Measuring genetic biodiversity 200
The isolated islands of Hawaii 201
3: Ecosystem services 202
Ethical reasons for maintaining biodiversity 202
Ecosystems services 202
Taking an ecosystems approach 203
4: Ex situ and in situ conservation 204
Ex-situ conservation 204
In-situ conservation 205
Conflicts in conservation 207
Exam-style questions 208
Topic 4: Exchange and transport 210
Chapter 4.1: Cell transport mechanisms 210
1: Transport in cells 212
The need for transport 212
The fluid mosaic model of the cell membrane 212
The main types of transport in cells 213
2: Diffusion and facilitated diffusion 214
Diffusion 214
Facilitated diffusion 214
3: Osmosis – a special case of diffusion 216
What is osmosis? 216
Osmotic concentrations 217
Osmosis in animal cells 217
Osmosis in plant cells 217
4: Active transport 220
How does active transport work? 220
Endocytosis and exocytosis 221
Exam-style questions 222
Chapter 4.2: Gas exchange 224
1: The need for gas exchange surfaces 226
Gas exchange in small organisms 226
Gas exchange in large organisms 227
Factors affecting the rate of diffusion 227
2: The mammalian gas exchange system 228
Effective gas exchange 228
The human gas exchange system 228
Gas exchange in the alveoli 229
Breathing 230
Protecting the lungs 231
3: Gas exchange in insects 232
Gas exchange in insects 232
Very active insects 233
4: Gas exchange in fish 234
The gas exchange system in fish 234
5: Gas exchange in plants 236
The gas exchange surfaces in plants 236
Controlling gas exchange 237
Lenticels and gas exchange 238
Thinking Bigger: Asthma 240
Exam-style questions 242
Chapter 4.3: Circulation 244
1: Principles of circulation 246
The need for transport 246
Circulation systems 246
2: The roles of the blood 248
The components of the blood and their main functions 248
Platelets 249
3: Transporting oxygen and carbon dioxide 250
Transport of oxygen 250
Other respiratory pigments 251
Transport of carbon dioxide 252
The clotting of the blood 252
The blood clotting cascade 253
4: Blood circulation 254
The blood vessels 254
Arteries 254
Capillaries 255
Veins 255
5: The human heart 257
The structure of the heart 257
How your heart works 258
6: Controlling the heart 260
The control of the heartbeat 260
7: Atherosclerosis 263
Cardiovascular diseases in the UK 263
The formation of atherosclerosis 263
Effect of atherosclerosis on health 264
8: Risk factors for atherosclerosis 266
Epidemiology 266
Non-modifiable risk factors for atherosclerosis 266
Modifiable (lifestyle) risk factors for atherosclerosis 267
Links between factors 268
9: Tissue fluid and lymph 270
The formation of tissue fluid 270
The formation of lymph 271
Thinking Bigger: An Artificial Pacemaker 272
Exam-style questions 274
Chapter 4.4: Transport in plants 276
1: Transport tissues in plants 278
Xylem 278
The structure of the phloem 279
2: The uptake of water by plants 281
Water from the soil 281
Translocation of water 281
Transpiration and the transpiration stream 282
Factors affecting transpiration 284
Root pressure 285
3: Translocation of sucrose 287
Translocation in the phloem 287
Mass flow and pressure flow hypotheses 288
Thinking Bigger: Turgor - Pressure Which Powers Plants 290
Exam-style questions 292
Maths skills 294
Arithmetic and numerical computation 294
Algebra 295
Handling data 295
Graphs 298
Applying your skills 298
Preparing for your exams 300
Glossary 306
Index 316