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GCSE
Biology paper 1
Organisation
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Cards (100)
What are large multicellular organisms made up of
organ systems
What is a
tissue
A group of
cells
that act together to perform a specific
function.
What is muscular tissue
A tissue that contracts to move whatever it's attached to
What is glandular tissue?
A tissue which makes and secrete chemicals like enzymes and hormones
What is epithelial tissue
Covers
parts
of the body
What is an organ
A group of different tissues that work together to perform a certain function.
What is an organ system
A group of organs working together to perform a particular function
What is an enzyme
biological catalyst
What is a catalyst?
Increases speed of the reaction without being used up
Wha are enzymes made of
Chains of amino acids
What is the
active site
The
active site
is the region on the
enzyme
where the substrate binds.
What is the optimum temperature?
Where the enzyme is the most active
What happens if the temperature gets too high
Bods holding the enzyme break
Shape of the active site changes
Substrate can't bind
Enzyme is denatured
What happens if the pH is too high or low
Interferes
with the
bonds
Shape of
active site
is changed
Enzyme is
denatured
What enzyme breaks down starch
amalyse
What is starch broken down into
maltose
Where is amalayse made
Salivary glands
,
pancreas
, small intestine
What breaks down protein
protease
What are protines broken down into
Amino acids
Where is protease made
Stomach,
pancreas
,
small intestine
What breaks down lipids
Lipase
What are lipids broken down into
Glycerol
and
fatty acids
Where is lipase made
Pancreas
and
small intestine
What is the function of bile
Neutralises stomach acids
and
emulsifies fats
What is the function of the
liver
in digestion
Where
bile
is produced
What is the function of the stomach
Pummels
food with
muscular walls
Produces
hydrochloride acid
Why is hydrochloric acid produced
Kill bacteria
Gives right
pH
for
protease
enzyme
What is the function of the gall bladder
stores bile
What's the function of the pancreas
Produces and releases enzymes into the small
intestine
What's the function of the small intestine
Produces
enzymes
Where
food
is absorbed
What's the function of the large intestine
Absorb
excess
water
What food test is used to test for sugars
Benedict's
(
water bath
)
WHats the colour change
Blue
to
green yellow
or brick red
What do you use to test for starch
Iodine
What's the colour change
Brown
to
black
or blue black
What test is used for protines
Biuret
test
Whats the colour change
Blue
to
purple
What's the test for
lipids
Sudan 111
What's the colour change
Bright red top layer
What does alveoli do
Carry out
gas exchange
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