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Chapter 5 structure/function of macromolecules neededinlife
Bio 10th edition, 1406
48
Biology
Undergraduate 1
10/09/2014

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Term
What are the 4 types of large molecules essential for life?
Definition
carbohydrates, lipids, proteins, and nucleic acids
Term
What are considered polymers or macromolecules?
Definition
Carbs, proteins, and nucleic acids
Term
What is a macromolecule?
Definition
A polymer, long molecule consisting of many similar or identical building blocks linked by convalent bonds
Term
What is a monomer?
Definition
building block of a polymer
Term
How do you make a polymer longer?
Definition
you have to have an enzyme and remove the h2o molecule by dehydration reaction.
Term
How would you break a polymer or shorten one?
Definition
You would add the h2o molecule from a hydration reaction
Term
What are carbohydrates?
Definition
macromolecules, contain C,H, and O atoms which are polymers-polysaccharides and monomers-monosaccharides
Term
What are monosaccharides?
Definition
multiple of CH2O, conatain carbonyl group, aldose and ketoses
Term
What is the difference between aldose and ketose?
Definition
aldose has c=o in the beginning and ketose has c=o placed anywhere
Term
3 types of monosaccharides
Definition
glucose, galactose, and fructose
Term
how many carbon atoms in a carbon skeleton of carbohydrates?
Definition
3-7
Term
What is a disaccharide?
Definition
consisted of 2 monosaccharides linked by covalent bonds (glycosidic linkage) formed by a dehydration reaction
Term
What are 3 disaccharides?
Definition
lactose, maltose, and sucrose
Term
What are polysaccharides?
Definition
polymers of carbs, chain of monosaccharides
Term
What are storage polysaccharides?
Definition
chain of glucose molecules-amylose (unbranched) and amylopectin )somewhat branched)
Term
What is a starch?
Definition
A dietary carbohydrate
Term
What is glycogen?
Definition
a polymer, sequence of glucose molecules which is highly branched
Term
What is a structural polysaccharide?
Definition
the polysaccharides found to form the structure of an organism, cellulose and chitin
Term
What is cellulose?
Definition
a storage polysaccharide, a polymer of glucose that has a different glycocidic bond, different location of the covalent band and not branched, has a different location of OH or hydroxyl group
Term
How does cellulose form chains?
Definition
they form chains parallel to eachother to form fibers or hydrogen bonds to each row.
Term
What are lipids?
Definition
large biological molecules, not a polymer contain CHO may contain NP. in general they are hydrophobic major source of energy
Term
What are the3 types of lipids?
Definition
fats, phospholipids, and steroids
Term
What are fats or triglycerides?
Definition
each molecule consists of glycerol attached to 3 fatty acids. covalent bonded (ESTER BOND)
Term
What is a fatty acid?
Definition
hydrocarbon chain one end is attached to carboxyl (hydrophobic)
Term
What is a Saturated fatty acid
Definition
the molecule contains single cvalent bonds only (straight structure), solid at room temp
Term
Unsaturated fatty acids
Definition
contains one or more double covalent bonds (bent structure bends at cis double bond) liquid at room temp
Term
What is a phospholipid?
Definition
similar to fat molecule but has only 2 fatty acids attached
Term
What is a steroid?
Definition
carbon skeleton has 4 fused rings, in general the steroids are hydrophobic but slightly hydrophilic. All steroid molecules are derived from cholesterol
Term
What are proteins?
Definition
macromolecule contains CHONP and sometimes S considered a polymer and monomer (amino acids)
Term
What is a polypeptide?
Definition
sequence of amino acids chained together to form a protein molecule
Term
What are the different functions of proteins?
Definition
act as enzymes, defense proteins, storage proteins, transport proteins, hormonal proteins, receptor proteins, contractile and motor proteins, and structural proteins
Term
Structure of amino acids
Definition

nonpolar side, hydrophobic

polar side, hydrophilic 

electically charged side chains, hydrophilic

Term
What is acidic in amino acis?
Definition
negative
Term
What is basic in amino acids?
Definition
positive
Term
What is a polypeptide bond?
Definition
a covalent bond between 2 amino acids bonded by duhydration reaction
Term
How would you create a peptide bond?
Definition
formed between 2 adjacent amino acid, next to it and carboxyl group of one amino acid to the next
Term
what 2 shapes are in amino acids structure?
Definition
fibrous and globular
Term
What is the primary structure of DNA
Definition
sequence of amino acid genetically inherited because of DNA
Term
What is the secondary structure?
Definition
hydrogen formed between amino group of one amino acid and carboxyl group of another at different locations
Term
What is a tertiary structure of DNA
Definition
3d shape of protein molecule by formation of hydrogen, ionic, or dysulfide bonds between R groups, Determines the function of protein
Term
What is a quaternary structure?
Definition
only if protein consists of more than 1 polypeptide, results from aggregation of theses polypeptide subunits.
Term
What happens if protein loses shape? denaturation-changing pH or change to high temp
Definition
it loses function
Term
What is a Nucleic Acid
Definition
macromolecules or polymers, polynucleotides and mononucleotides
Term
What is the structure of nucleotide
Definition
nitrogen base, pentose sugar, and phosphate group
Term
What are the nitrogen bases
Definition
cytosine, thymine (DNA), uracil (RNA), thymine, and guanine
Term
What is DNA
Definition
part of the chromosome, double stranded nitrogen bases have to be inside the backbone
Term
RNA
Definition
single stranded, ribose and cannot have thymine
Term
What are the 3 types of RNA
Definition
Messenger, ribosome, and transfer RNA
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