Water, Carbohydrates, and Lipids (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
4 elements in 99% of living organisms
4 elements in 99% of living organisms
Carbon, hydrogen, oxygen, nitrogen
Covalent bond
Covalent bond
Strong bond created by sharing electrons between atoms
Why water is polar
Why water is polar
O draws electrons away, creating uneven charge distribution
Where H-bonds form in water
Where H-bonds form in water
Between δ⁺ H of one molecule and δ⁻ O of another
Ice vs liquid water density
Ice vs liquid water density
Ice is less dense than liquid water
Cohesion
Cohesion
Water molecules attracted to each other by H-bonds
Adhesion
Adhesion
Water molecules attracted to surfaces like cell walls
Monomer
Monomer
Single small molecule that bonds with others to form larger ones
Condensation reaction releases
Condensation reaction releases
One water molecule (H₂O)
Hydrolysis reaction
Hydrolysis reaction
Splits molecules by adding water to break covalent bonds