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Form between atoms that share electrons rather than donating or receiving them |
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Electrons are transfered completely from one atom to another and are not shared |
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a weak chemical attraction that form between covalently bonded hydrogens and either oxygens or nitrogen on different molecules |
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Occurs when the ionic bond is broken and the atoms dissocitated into unattached charged particles called ions |
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pH measures how acidic or basic a soluntion is |
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a component dissolved in whater released excess hydron inons pH below 7 |
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when a component releases excess hydroxyl ion (OH-) when dissolved in whater pH above 7 |
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Four Families of biochemicals |
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Definition
1. Carbohydrates 2. Lipids 3. Proteins 4. Nucleic acids |
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1. Primary Structure: order of amino acids 2. Secondary Structure: localized modular structure 3. Tertiary Structure: three dimensional shape of protein 4. Quaternary Structure: association of more than one peptide |
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Components of nucleic acids (3) |
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1. Nitrogen base 2. Pentose Sugar (5 carbon) 3. Phosphate |
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Adenine, Cytosine, Guanine, Thymine |
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Adenine, Cytosine, Guanine, Uracil |
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a nucleotide containing adenine, ribose and three phosphates |
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Three characteristics cells share |
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1. Have cytoplasmic membrane 2. have ribosomes for protein synthesis 3. obtain energy from their environment |
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unequal distribution of electrons |
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what are non-polar molecules |
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an electrically neutral molecule |
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What is considered an organic chemical? |
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Carbon compounds with a basic framework of the element carbon bonded to other atoms |
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sugars and polysaccarides |
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structure (cellulose) or energy storage (starch) |
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simple carbohydrate with a sweet taste |
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Contains 2 monosacchardies |
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Contains 5 or more monosaccharides |
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Functions of Polysaccharides? |
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-structural support and protection -serve as nutrient and energy stores -cells walls in plants and many microscopic algae are formed from cellulose |
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Triglycerides Phospholipids Sterols |
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What is a phospholipid made of? |
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1 hydrophilic phosphate head and 2 hydrophobic fatty acid tails |
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What is the function of a triglyceride? |
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Can be structural Mechanical Enzymatic |
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organizers of protein synthesis |
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