Questions From Sophie
Qn1.
What is the difference between a sucrose solution and a sugar
solution?
Sucrose is a type of sugar. Other sugars include glucose, galactose,
fructose, maltose and lactose.
Qn2.
Which solution is more dilute?
-0.2mol/dm3 0.2mol/dm3 as it contains less of the
substance in 1 dm3 of liquid.
-0.4mol/dm3
Qn3.
What do u mean by high concentration? Means that it contains a lot
of the substance in the solution. Difference is for water where we
talk abt water potential and not concentration of water.
-distilled water
-salt solution
-sugar solution
-sucrose solution
Qn4.
What is the difference between a strong solution and weak solution?
(Any eg)
Strong solution means it is very concentrated with the substance
like strong salt solution means the solution is super salty.
Weak solution means it is diluted. Can be so diluted that a very
weak salt solution can have no taste of salt at all cos very little
of it in the water.
Qn4.
Will the iodine solution appear blue-black no matter how much
amylase and starch solution there are?
Iodine will only turn blue black when there is presence of starch.
It has nothing to do with amylase. If there is no starch present,
then iodine will remain yellow. The experiment that we did on enzyme
is to see that amylase has digested the starch. If digestion
occurred, then no more starch is present. If no digestion, then
starch will be present and iodine will turn blue black.
Qn5.
What is the maximum temp an enzyme can function and what will be the
temp. when it denature?
It varies for different enzymes. Those that U need to know are found
in the body so the maximum will be about 40oC. Any temp after that,
the enzyme will denature.
Qn6.
What is the result when amylase solution is added with HCI?
Amylase works in a neutral or slightly alkaline medium. When in
contact with acid, it will denature and lose its 3 dimensional
conformation, hence it cannot function anymore.
Qn7.
What will happen to the solution (amylase+acid) if iodine solution
is added?
The amylase will be denatured by the acid but nothing will happen to
the iodine solution if there is no starch ļ
But when there is starch, the starch molecule will be broken down by
the acid and not by amylase. Hence, there is also no blue black
colouration when iodine is added.
Qn8.
When amylase act with acid, what will happen?
The amylase will be denatured by the acid and lose its 3 dimensional
conformation, hence it cannot function anymore.
What is the difference between a sucrose solution and a sugar
solution?
Sucrose is a type of sugar. Other sugars include glucose, galactose,
fructose, maltose and lactose.
Qn2.
Which solution is more dilute?
-0.2mol/dm3 0.2mol/dm3 as it contains less of the
substance in 1 dm3 of liquid.
-0.4mol/dm3
Qn3.
What do u mean by high concentration? Means that it contains a lot
of the substance in the solution. Difference is for water where we
talk abt water potential and not concentration of water.
-distilled water
-salt solution
-sugar solution
-sucrose solution
Qn4.
What is the difference between a strong solution and weak solution?
(Any eg)
Strong solution means it is very concentrated with the substance
like strong salt solution means the solution is super salty.
Weak solution means it is diluted. Can be so diluted that a very
weak salt solution can have no taste of salt at all cos very little
of it in the water.
Qn4.
Will the iodine solution appear blue-black no matter how much
amylase and starch solution there are?
Iodine will only turn blue black when there is presence of starch.
It has nothing to do with amylase. If there is no starch present,
then iodine will remain yellow. The experiment that we did on enzyme
is to see that amylase has digested the starch. If digestion
occurred, then no more starch is present. If no digestion, then
starch will be present and iodine will turn blue black.
Qn5.
What is the maximum temp an enzyme can function and what will be the
temp. when it denature?
It varies for different enzymes. Those that U need to know are found
in the body so the maximum will be about 40oC. Any temp after that,
the enzyme will denature.
Qn6.
What is the result when amylase solution is added with HCI?
Amylase works in a neutral or slightly alkaline medium. When in
contact with acid, it will denature and lose its 3 dimensional
conformation, hence it cannot function anymore.
Qn7.
What will happen to the solution (amylase+acid) if iodine solution
is added?
The amylase will be denatured by the acid but nothing will happen to
the iodine solution if there is no starch ļ
But when there is starch, the starch molecule will be broken down by
the acid and not by amylase. Hence, there is also no blue black
colouration when iodine is added.
Qn8.
When amylase act with acid, what will happen?
The amylase will be denatured by the acid and lose its 3 dimensional
conformation, hence it cannot function anymore.
Labels: Biology Groups