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Bio Topic 3 ( The chemistry of life)
Ib biology Hl Topic 3
4
Biology
11th Grade
11/11/2010
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Term
3.1.1 State the most frequently (4) occurring chemical elements in living things
 Definition
Carbon; hydrogen; oxygen; nitrogen
Term
3.1.2 What other (5) elements are needed by living organisms
 Definition
Sulfur, calcium, phosphorus, iron and sodium
Term
3.1.3 State a role for Sulfur, calcium, phosphorus, iron and sodium
 Definition

Sulfur: A component of amino acids and proteins

Calcium: Strength for bones

Phosphorus: in nucleotides including DNA, RNA and ATP

Iron:oxygen transport in animals and a component of cytochrome proteins involved in electron transport in animals

Sodium:plays a role in nerve impulses in animals, play a role in maintaining osmotic balance
Term
3.1.4 Draw and label a diagram showing the structure of a water molecule to show their polarity and hydrogen bond formation
 Definition
[image]
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