- •Carbohydrate
- •Minerals
- •Water: h2o
- •Mandatory Food Tests
- •Mandatory Activities
- •Investigation of Abiotic Factors (Three Mandatory Activities) Soil pH
- •Improper Trapping Techniques: all evasive species may not be captured and/or insufficient numbers captured in follow up surveying.
- •Mandatory Activities
- •Investigation of Abiotic Factors (Three Mandatory Activities) Soil pH
- •Improper Trapping Techniques: all evasive species may not be captured and/or insufficient numbers captured in follow up surveying.
- •Mandatory Activities
- •Investigation of Abiotic Factors (Three Mandatory Activities) Soil pH
- •Improper Trapping Techniques: all evasive species may not be captured and/or insufficient numbers captured in follow up surveying.
- •Mandatory Activities
- •Investigation of Abiotic Factors (Three Mandatory Activities) Soil pH
- •Improper Trapping Techniques: all evasive species may not be captured and/or insufficient numbers captured in follow up surveying.
- •Cell Structure
- •36 Of the 38 atPs from one molecule of glucose are produced in the mitochondrion.
- •Cell Structure
- •36 Of the 38 atPs from one molecule of glucose are produced in the mitochondrion.
- •Cell Structure
- •36 Of the 38 atPs from one molecule of glucose are produced in the mitochondrion.
- •Active Site Theory
- •Bioprocessing
- •Immobilised enzymes are not free in solution – for example they cam be held in a bead of soft permeable gel or coat the internal surface of a porous solid.
- •Mandatory Activities
- •Investigate the Effect of Heat Denaturation on the Activity of an Enzyme
- •Active Site Theory
- •Bioprocessing
- •Immobilised enzymes are not free in solution – for example they cam be held in a bead of soft permeable gel or coat the internal surface of a porous solid.
- •Mandatory Activities
- •Investigate the Effect of Heat Denaturation on the Activity of an Enzyme
- •Active Site Theory
- •Bioprocessing
- •Immobilised enzymes are not free in solution – for example they cam be held in a bead of soft permeable gel or coat the internal surface of a porous solid.
- •Mandatory Activities
- •Investigate the Effect of Heat Denaturation on the Activity of an Enzyme
- •Photosynthesis
- •In the Dark Stage electrons from chlorophyll, protons from the pool and carbon dioxide react together forming carbohydrate
- •Detailed Description of Photosynthesis
- •In fermentation the glucose is only partially broken down. A lot of energy is still available in ethanol and lactic acid.
- •Aerobic Respiration of Glucose (6c)
- •Bioprocessing With Immobilised Cells
- •Mandatory Activity
- •Insert a ‘fermentation lock’ into each.
- •Osmosis
- •Introduction
- •Isolation of dna from Plant Tissue Textbook Diagram: dna isolation from plant tissue.
- •Vegetative Structure Textbook Diagram: vegetative structure.
- •Vegetative structure is haploid (n).
- •In favourable conditions the zygospore germinates by meiosis.
- •Precautions
- •View the incubated plates through the clear lid - never remove the lid.
- •Functions of Plant Parts
- •Its nucleus also controls the sieve element.
- •Immunity: protection against pathogens — blood clotting; phagocytes, lymphocytes and antibodies distributed in blood.
- •Valves in the veins prevent the backflow of blood so the flow is in one correct direction towards the heart.
- •The Heart
- •The Lymphatic System
- •Mandatory Activities
- •Investigate the effect of exercise on your heart rate
- •Identify the arteries – pulmonary connected to right ventricle, aorta to left ventricle.
- •Plant Growth Regulators
- •Plant Protection Adaptations
- •Mandatory Activity
- •Investigate the Effect of Auxin on Plant Tissue
- •Improved chance of success by reducing competition and overcrowding.
- •Seed Dormancy
- •Seed Germination
- •Stages of Seedling Growth
- •Mandatory Activities
- •Incubate all plates upside down for 3 days at 20°c.
- •Seed Dormancy
- •Seed Germination
- •Stages of Seedling Growth
- •Mandatory Activities
- •Incubate all plates upside down for 3 days at 20°c.
Bias: purposely choosing sample sites to get ‘good results’ or avoid work.
Too Few Sample Sites: may not give accurate representative results.
Surveyor Variation: students vary in ability, commitment and interest.
Equipment Quality: measurement and trapping success will be affected.
Changing Nature: results may depend on the time of day, season or year.
Chance: cannot survey every square centimetre so even with many sites some species may be missed.
Improper Trapping Techniques: all evasive species may not be captured and/or insufficient numbers captured in follow up surveying.
The Cell
Cell Theory
All living organisms are made up of cells and new cells are produced when live cells divide.
Textbook Diagrams: animal and plant cell as seen with light and electron microscopes.
Light Microscope Study Components of Animal Cells: cell membrane, cytoplasm, nucleus, chromosomes.
Extra Components of Plant Cells: cell wall, chloroplast, vacuole.
Electron Microscope Study Extra components and details:
Cell membrane, mitochondrion, nuclear pores, ribosomes, chromatin, details of chloroplast mitochondrion structure, double membrane nature of nuclear envelope and outline structure of cell membranes.
(The term protoplasm is useful and refers to the cell membrane, cytoplasm and its contents and the nucleus. The large vacuole of plant cells is not included.)
Cell Structure
Cell Membrane
Semipermeable: water, oxygen and carbon dioxide freely pass through it, many other chemicals cannot.
Selectively permeable: controls entry and exit of specific materials.
Keeps cell contents together allowing efficient coordination of its activity.
Maintains the interior of the cell at a suitable constant composition for efficient metabolism
Cytoplasm
The living contents of a cell excluding the nucleus and large vacuoles.
A complex solution in which the cell’s organelles are suspended.
Many biochemical processes take place here, e.g., glycolysis and fermentation.
About 90% water.
Nucleus
Contains DNA, the hereditary material.
The genes are present in the DNA.
Controls the cell’s structure and metabolism.
DNA (deoxyribonucleic acid) is visible as chromatin in active cells and as chromosomes during mitosis and meiosis.
A nucleus is not present in a red blood cell or phloem sieve element.
Nuclear Pores Large molecules can pass between the cytoplasm and the nucleus through these pores. Examples: RNA from nucleus to cytoplasm and nucleotides from cytoplasm to nucleus.
Chromatin Chromatin is the very fine thread-like combinations of DNA and protein in non-dividing nuclei. The protein assists in the efficient packaging and regulation of DNA activity. A human nucleus contains 46 such fine threads of chromatin.
Chromosomes A chromosome is a ‘condensed chromatin’ thread visible during mitosis and meiosis.
Haploid nuclei have one set of chromosomes i.e. one of each kind of chromosome. Each chromosome has a unique set of genes. Each gene has a specific locus – it is on a particular chromosome at a specific site.
Diploid nuclei have two sets of chromosomes i.e. two of each chromosome.
Symbol for haploid: n Symbol for diploid: 2n
The nuclei of human somatic cells are diploid (2n). Each human nucleus has 46 chromosomes i.e. two sets of 23 chromosomes. One set was received from the mother in the haploid egg cell, the other in the father’s haploid sperm cell.
Sex Chromosomes: the 23 rd pair. Female: XX Male XY
Mitochondria: