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Biology Unit 1
Biological molecules
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Cards (56)
What do carbohydrates literally mean?
Hydrated carbon
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What is the primary use of carbohydrates in the human body?
ATP production
during
respiration
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How are carbohydrates stored in the liver and muscles?
As
glycogen
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What are monosaccharides?
Simple carbohydrates known as
monomers
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What is the general formula for monosaccharides?
C, H, O
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What are the two types of carbohydrates mentioned?
Monosaccharides
and
polysaccharides
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What is the difference between a monomer and a polymer?
A
monomer
is a
single
unit
; a
polymer
is
many
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What is glucose classified as?
A
hexose
sugar
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What does it mean for glucose to be a polar molecule?
It is
soluble
in water
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How many carbons does glucose contain?
Six
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What are the two structural forms of glucose?
Alpha
and
beta
glucose
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What are isomers?
Molecules with the same
chemical
formula
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Where is the hydroxyl group on alpha glucose?
Below the
ring structure
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Where is the hydroxyl group on beta glucose?
Above the
ring structure
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What is glycogen used for?
Energy storage
in
liver
and
muscles
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What is cellulose used for?
To form
plant cell walls
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What are proteins made from?
Amino acids
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What elements are amino acids made from?
Carbon
,
hydrogen
,
oxygen
, and
nitrogen
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What do amino acids join together to form?
A
polypeptide
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What is the primary structure of a protein?
The specific sequence of
amino acids
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What determines how a protein folds into a specific shape?
The unique sequence of
amino acids
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What bonds are present in the primary structure of proteins?
Peptide bonds
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What is the secondary structure of a protein?
Folding into
alpha helices
or
beta sheets
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What holds the secondary structure together?
Hydrogen bonds
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What is the tertiary structure of a protein?
Folding into a precise
3D
shape
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What bonds hold the tertiary structure together?
Various bonds between
amino acid
groups
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What is quaternary structure in proteins?
More than one
polypeptide
chain
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What is a prosthetic group?
A chemical group not made of
amino acids
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What are globular proteins?
Soluble proteins
with various functions
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How many polypeptide chains does haemoglobin have?
Four
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What does each polypeptide chain in haemoglobin contain?
One
prosthetic
group called
haem
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What is collagen?
A
fibrous
protein
in connective tissue
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Why is collagen insoluble in tissue fluid?
To
prevent
it from
dissolving
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What are glycoproteins?
Proteins with
carbohydrates
attached
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What role do glycoproteins play in cell membranes?
Cell
recognition
and signaling
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What are triglycerides primarily used for?
Energy storage
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How do triglycerides compare to carbohydrates in energy content?
They provide
twice
as much energy per gram
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What are triglycerides made from?
One
glycerol
and three
fatty acids
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What type of bonds attach fatty acids to glycerol?
Ester bonds
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What are the two types of fatty acids?
Saturated
and
unsaturated
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