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Chapter Two (quiz one)
The Chemistry of Biology
33
Microbiology
Undergraduate 2
01/26/2013

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Term
Covalent Bonds
Definition
Form between atoms that share electrons rather than donating or receiving them
Term
Ionic Bonds
Definition
Electrons are transfered completely from one atom to another and are not shared
Term
Hydrogen Bonds
Definition
a weak chemical attraction that form between covalently bonded hydrogens and either oxygens or nitrogen on different molecules
Term
Ionization
Definition
Occurs when the ionic bond is broken and the atoms dissocitated into unattached charged particles called ions
Term
What is pH?
Definition
pH measures how acidic or basic a soluntion is
Term
What is Acidic?
Definition
a component dissolved in whater released excess hydron inons
pH below 7
Term
What is Basic?
Definition
when a component releases excess hydroxyl ion (OH-) when dissolved in whater
pH above 7
Term
Four Families of biochemicals
Definition
1. Carbohydrates
2. Lipids
3. Proteins
4. Nucleic acids
Term
Four protein structures
Definition
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
Term
Components of nucleic acids (3)
Definition
1. Nitrogen base
2. Pentose Sugar (5 carbon)
3. Phosphate
Term
Nucleotides of DNA
Definition
Adenine, Cytosine, Guanine, Thymine
Term
Nucleotides of RNA
Definition
Adenine, Cytosine, Guanine, Uracil
Term
Components of ATP
Definition
a nucleotide containing adenine, ribose and three phosphates
Term
What does ATP stand for
Definition
Adenosine triphoshate
Term
Three characteristics cells share
Definition
1. Have cytoplasmic membrane
2. have ribosomes for protein synthesis
3. obtain energy from their environment
Term
what are polar molecules
Definition
unequal distribution of electrons
Term
what are non-polar molecules
Definition
an electrically neutral molecule
Term
Oxidation?
Definition
Loss of electrons
Term
Reduction?
Definition
Gain of electrons
Term
pH equation?
Definition
pH=-log[H+]
Term
What is considered an organic chemical?
Definition
Carbon compounds with a basic framework of the element carbon bonded to other atoms
Term
Carbohydrates include?
Definition
sugars and polysaccarides
Term
Carbohydrates use?
Definition
structure (cellulose) or energy storage (starch)
Term
Saccharide?
Definition
simple carbohydrate with a sweet taste
Term
Monosaccharide?
Definition
contains 3-7 carbons
Term
Disaccharide?
Definition
Contains 2 monosacchardies
Term
Polysaccharide?
Definition
Contains 5 or more monosaccharides
Term
Functions of Polysaccharides?
Definition
-structural support and protection
-serve as nutrient and energy stores
-cells walls in plants and many microscopic algae are formed from cellulose
Term
Important Lipids (3)
Definition
Triglycerides
Phospholipids
Sterols
Term
What is a phospholipid made of?
Definition
1 hydrophilic phosphate head
and 2 hydrophobic fatty acid tails
Term
What is the function of a triglyceride?
Definition
energy storage
Term
Protein functions?
Definition
Can be structural
Mechanical
Enzymatic
Term
What is RNA
Definition
organizers of protein synthesis
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