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WorksheetsBiology tests
Total questions: 33
Worksheet time: 33mins
What is a reagent ?
It is a chemical that indicates the presence of a substance.
It is a chemical that changes colour
Chemical substance that can detect if a substance is an acid
Chemical substance that indicates that a substance is not present
What is the reagent for glucose?
iodine
benedicts solution
biuret
ethanol
What is the method for the glucose food test?
iodine solution is placed in the food.
We put benedicts solution in a test tube and heat it till it changes colour.
glucose solution is placed in a test tube and some drops of benetics too. It is put in a water bath
benedicts soltion is added to the food.
What is the positive result of a glucose test?
yellow
purple
blue
brick-red
What is starch test reagent?
iodine
biuret
benedicts
ethanol
What is the method for starch food test?
place iodine solution in a beaker and put it in a water bath.
place iodine in the food
put it next to the food
make iodine react with ethanol to take all the fat away.
What is a positive result for the starch test?
black
pink
blue-balck
red
What is the reagent for the protein food test?
iodine
benedicts
biuret
ethanol
What is the method of proteins food test?
a soltion is put in a water bath.
a solution of biuret is put in a test tube
a solution of beans is put in a test tube with biuret solution.
a solution of albumen is put into a test tube then an equal volume of biuret is added.
What is a positive result for protein food test?
darker red
orange
blue
purple
What is fat food test reagent?
ethanol
biuret
benedicts
iodine
what is the method of fat food test?
:)
add ethanol to the food to dissolve the fat then add cold water.
extract ethanol from the food and add hot water.
add ehanol to the food and add hot water
What is fat protein test results?
red emulsion
purple emulsion
white emulsion
black emulsion
When the rate of an enzymed-catalysed reaction is happening. What happens?
tempetures get too high the enzymes stop.
as the reaction increases also the tempeture increases
when the reaction increases the tempeture dereases
when tempetures get too high the rate decreases as enzymes become denatured and can not function.
Which are the enzymes?
cuidarse
amylase
lipase
protease
What does the amylase enzyme do ?
digest starch molcules and break them down in animo acids
it digests large starch molecules and break them down into maltose.
digest large protein molecules and break them down into animo acids.
it makes a reaction go faster
What does the enzyme protease do ?
Pepsin from the stomach and trypsin from the pancreas.
digests large protein molecules and break them down in polypeptides, then animo acids.
it digests fat molecules and break them down in glucose
it brings fastest reaction
what does the enzyme lipase do?
break down your mama
break down fat into glucose
break down protein into animo acids
break down fats into glycerol and fatty acids
What is diffusion?
(a)
where does diffusion happen in?
liquids
liquids and gases ( fluids)
solids
gases
What is osmosis?
(a)
why is the photosynthesis bubbles test used for?
to investigate light density and how it affects the rate of photosynthesis.
to investigate how fast photosynthesis goes
to investigate light density in plants
to just investigate the science
What is the metod for the photosynthesis bubbles test?
(a)
Which result does the photsynthesis bubble give?
i when the light source is further away the rate of photsynthesis will increase
more oxygen bubbles will be formed when the light source is closer.
The greater light density gives a greater rate of photosynthesis.
not this option
what is the method for the photosynthesis starch test?
(a)
What are the results from the photosynthesis starch test.
the white parts will turn blue
the parts that are green( that contain chlorophyll) will turn blue-black, as they contain starch.
the leaf will stay yellow-brown
yeah cool
what is the method for the test for measuring the energy content on food.
(a)
how can i calculate the number of joules that were transferred to the water
see how many bubbles it creates while hot
just do math
(final temp-start temp)x20x4.2\mass of food
start temp-final temp\2
What are buffer solutions?
soltions that can be used in science
solutions that contain potato extract
they are solutions that can resists changes in the pH.
solutions that can be used in any experiment
What is the method of the test for enzyme activity and pH?
(a)
what are the results of the test of enzyme activity affected by pH?
no option 1
when the pH was 6\7 the bubbles per minute increased
when the pH was neutral the bubbles where much faster
when the pH was 5\8 the bubbles per minute decreased
what a method for the test photsynthesis in plants?
(a)
What were the results of the test photosynthesis in plants?
test tube with translucent turned green
test tube with light conditions turned purple
test tube with dark conditions turned yellow
control test tube turned red
