1
Q
Starch
A
Add 5 drops of iodine to the sample
Positive result = brown to blue black
2
Q
Benedicts test for reducing sugar
A
Add 1ml Benedicts reagent to sample
Heat to 95°C for 3 minutes in water bath
Positive result = Brick red precipitate forms
3
Q
Non reducing sugar test
A
Carry out benedicts test and get a negative result
Add dilute Hydrochloric acid to sample and boil
Netrualise with NaHCO3 until it stops fizzing
Add benedicts reagent and heat
Positive result - blue before hydrolysis, brick red after
4
Q
Emulsion test for lipids
A
Dissolve sample in ethanol
Add water
Positive result - White emulsion forms
5
Q
Biuret test for proteins
A
Add biuret reagent
Positive result - pale blue to lilac
Biology - Unit 1-4
flashcards
Decks in class (65)
# Cards
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Unit 1 Specification11
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1. Monomers and Polymers18
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1. Carbohydrates104
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1. Proteins - Many proteins are enzymes52
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1. Lipids42
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1. Structure of DNA and RNA61
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1. DNA Replication19
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1. ATP31
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1. Water4
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1. Inorganic Ions18
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1. Structures of all biological molecules15
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1. Food tests5
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Unit 2 Specification6
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2. Eukaryotic Cell Structure90
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2. Organelle Structure and Function45
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2. Structure of Prokaryotic Cells49
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2. Viruses and Viral replication12
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2. Light and Electron Microscopes32
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2. Cell Calculations and AIM Triangle18
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2. Mitosis and Cell Cycle38
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2. Cell Fractionation21
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2. Transport across cell membranes2
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2. Cell Membrane Structure and Function41
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2. Osmosis18
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2. Active Transport15
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2. Simple and Facilitated Diffusion28
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2. HIV8
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2. Immune System - phagocytes, B cells and T cells23
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Unit 3 Specification5
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3. Surface Area to Volume ratios5
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3. Plants and Xerophytes10
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3. Fish and insect gas exchange12
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3. Lung Ventilation14
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3. Alveoli and Gas Exchange10
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3. Lung Disease5
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3. Mid UNIT13
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3. Digestion13
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3. Enzymes - Digestion9
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3. Mass Transport12
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3. Haemoglobin10
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3. Tissue Fluid13
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3. Cardiac Cycle3
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3. Heart Disease7
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3. Some lovely exam Qs12
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3. Human Respiratory System9
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3. Water in Plants - Xylem13
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3. Phloem in Plants6
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Unit 4 Specification7
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4. DNA in Euk and Prok cells12
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4. The Genetic Code21
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4. RNA and protein synthesis17
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4. Genetic mutations cause genetic diversity6
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4. Meiosis causes genetic diversity15
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4. Random fertilisation and unusual life cycles10
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4. Genetic Diversity7
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4. Natural selection6
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4. Directional & stabilising selection8
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4. The concept of species and courtship12
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4. Classification12
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4. Genome Sequencing and Immunology15
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4. Biodiversity8
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4. Biodiversity farming and deforestation11
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4. Investigating Diversity6
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Definitions0
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bam6
