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Presentation transcript:

What are you worth?

What are YOU worth? $160 HKD 1251.03

2.1 Molecules to Metabolism State the four most common elements found in living organisms Describe the difference between organic and inorganic molecules Describe examples of carbon compounds Define metabolism Describe how macromolecules are both built and broken down

Four most common elements in living organisms H O N

Inorganic or organic? Organic compounds = carbon, contain C-H bonds Inorganic compounds = no carbon, no C-H bonds Exceptions… Carbon dioxide – has carbon but is inorganic (no C-H bond) Urea – has no C-H bond but is organic

Life is based on carbon compounds

Other elements can be added to carbon to make complex 3D molecules Carbon compounds Other elements can be added to carbon to make complex 3D molecules Rules? Carbon has 4 covalent bonds

Carbohydrates Lipids Proteins Nucleic acids Carbon compounds Carbohydrates Lipids Proteins Nucleic acids

Carbon Hydrogen Oxygen 2 hydrogen:1 oxygen Carbohydrates Carbon Hydrogen Oxygen 2 hydrogen:1 oxygen These sugars can form pairs or long chains Some sugars join other molecules (e,g. deoxyribose)

Lipids Fatty acid tail Carbon Hydrogen Oxygen

Proteins Chain of amino acids (there are 20) Contain: carbon hydrogen oxygen nitrogen Some contain: sulphur

General structure of an amino acid

Nucleic acids Chains of nucleotides Carbon Hydrogen Oxygen Nitrogen Phosphorus e.g. RNA DNA

“Drawing molecular diagrams of glucose, ribose, a saturated fatty acid and a generalised amino acid” 20 seconds to look Draw using pencil Correct any mistakes

Glucose

Ribose

Saturated Fatty Acid

Amino Acid

Draw the structure of the functional groups on page 65

Identify the molecule Are the molecules amino acids, lipids or carbohydrates? Highlight any functional groups you can find Complete the worksheet

Identify the molecule Carbohydrate (Ribose)

Identify the molecule Lipid (Stearic acid)

Identify the molecule Lipid (Triglyceride)

Identify the molecule Amino acid

What happens to the energy? Type of metabolism What is it? What happens to the energy? Anabolism Catabolism Page 67

Metabolism Sum of all enzyme catalysed reactions in an organism (both intra and extracellular) A number of pathways – one molecule is transformed into another in a series of small steps Anabolism Catabolism

Anabolism Build up larger molecules from smaller ones Require energy (ATP) Form macromolecules from monomers

Catabolism Larger molecules broken down into smaller ones Release energy – re-used in the cell Macromolecules into monomers