BIO 160 Chapter 3 Flashcards
organic compounds
are carbon based molecules
hydrocarbon
are the simplest organic compounds, contains only carbon and hydrogen
Methane
simplest hydrocarbon, Carbon, 4 Hydrogens
larger hydrocarbons
contain fat
macromolecules
Carbohydrates, Proteins, and Nucleic Acid
polymers
many monomers
monomers
smaller molecules
functional groups
groups of atoms that usually participate in chemical reactions
Hydroxyl groups
-OH
Carboxyl groups
-COOH
How are macromolecules created?
chemical reactions
dehydration reactions
join monomers to create polymers, take out water
hydrolysis reactions
break polymers into monomers, adds a molecule of water
Carbohydrates
sugars and polymers of sugars
Carbohydrates in Animals
source of dietary energy and raw material for producing other compounds
Carbohydrates in Plants
make up plant body and cell wall
monosaccarides
carbohydrate monomer subunit, simple sugar that cannot be broken down by hydrolysis
C6H12O6
glucose, fructose
isomers
same molecular formula but different structures
disaccharide
double sugar, by dehydration reaction
Lactose (glucose+galactose=milk)
Sucrose (glucose+fructose=table sugar)
polysaccharides
complex carbohydrates, made of long chains of sugar units Ex. starch , glycogen, cellulose
lipids
hydrophobic molecules
hydrophobic
water fearing
hydrophillic
water loving
triglycerides
glycerol and 3 fatty acids
triglyceride functions
energy storage, insulation, cushioning
unsaturated
have fewer than the maximum hydrogens, fish oil and plant oils, liquid at room temp
saturated
have the maximum number of hydrogens, animal fats, solid at room temperature,Contributes to atherosclerosis (plaque formation)
hydrogenation
converts unsaturated fats to saturated fats, by adding hydrogen, creates trans fats
steroids
have different structure of 4 carbon rings
cholesterol
provides fluidity to cell membranes, used to make estrogen and testosterone
synthetic anabolic steriods
variants of testosterone, may cause physical/mental problems, may be describeds as treatment, maybe abused by athletes to enhance performance.
proteins
polymers from amino acid monomers, perform most tasks required for life, form enzymes that catalyze chemical reactions
amino acids
have a carboxyl group, amino group, hydrogen atom and functional group (R)
How are proteins made?
amino acids form peptide bonds by dehydration reactions
protein primary structure
linear sequence of amino acids
protein secondary structure
is facilitated by hydrogen
bonds along the polypeptide backbone
protein tertiary stucture
is facilitated by bonds between
the a R-groups
protein quaternary structure
facilitated by bonds
between two or more polypeptide chains
denaturation
occurs when a protein unravels or loses its shape ex. high heat and eggs
nucleic acid
are macromolecules that store information and provide directions for building proteins. • Deoxyribonucleic acid (DNA) • Ribonucleic acid (RNA)
chromosomes
made up of DNA
genes
are specific stretches of DNA that
determines the amino acid sequence of a
polypeptide
nucleic acid monomers
nucleotides
nucleotide make up
5-carbon sugar, phosphate group, nitrogen-containing base
DNA Nucleotide base
- Adenine (A)
- Guanine (G)
- Cytosine (C)
- Thymine (D)
DNA vs RNA
– Two strands of DNA join together to form a double
helix.
• Hydrogen bonding occurs between bases of either DNA
strand
– A pairs with T
– G pairs with C
– RNA has ribose sugar and contains uracil (U)
instead of thymine (T)
sugar phosphate backbone
repeating pattern of sugar-phosphate-sugar
when complex, contains many subunits in chains or branches
Carbohydrates
made of long carbon chains, but do not have repeating subunits
Lipids
not typically used for energy production
Nucleic Acids
subunits are amino acids
Proteins
used to speed up chemical reations
Proteins
used for storing, transmitting, and executing genetic information
Nucleic Acid
can serve as structural support for cells in some organisms
Carbohydrates
subunits are composed of a nitrogenous base, 5-carbon sugar, and phosphate group
Nucleic Acid
subunits are joined to each other with peptide bonds
proteins
some function as hormones
lipids
subunits are called mono saccharides
carbohydrates
energy-storing molecules that are typically insoluble in water
lipids
subunits each have the same core structure but the side chains differ
proteins
the three dimensional shape of the molecule is essential for it to function correctly
proteins
may be useful as padding or insulation
lipids
subunits are formed from carbon rings
carbohydrates
the two forms of these molecules differ based on whether they form one chain of subunits or two chains of connected subunits
nucleic acid
most prevalent molecule in cell membranes
lipids
energy storing molecule, typically water soluble
carbohydrates
subunits are nucleotides
nucleic acids