Skin creams contain many different chemicals - Scottish Highers Chemistry - Question 6 - 2018
Question 6
Skin creams contain many different chemicals.
(a) Retinol (vitamin A) promotes cell regeneration.
One method of supplying retinol to the skin is by using a skin cre... show full transcript
Worked Solution & Example Answer:Skin creams contain many different chemicals - Scottish Highers Chemistry - Question 6 - 2018
Step 1
Name the type of reaction that occurs when retinyl palmitate is broken down to form retinol.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The reaction that occurs when retinyl palmitate is broken down to form retinol is known as hydrolysis.
Step 2
Write a molecular formula for retinol.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The molecular formula for retinol is C20H30O.
Step 3
Describe how free radicals are formed.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Free radicals are formed through processes such as bond breaking due to exposure to UV light or chemical reactions where stable molecules split, producing unstable free radicals.
Step 4
State the name given to this step in the chain reaction.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The name given to this step in the chain reaction is propagation.
Step 5
State how free radical scavengers prevent further chain reactions.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Free radical scavengers prevent further chain reactions by reacting with free radicals to form stable molecules, thereby stopping the propagation of chain reactions.
Step 6
Circle a peptide link in the above structure.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
In the given structure, the peptide link can be identified and circled between the -CO-NH- groups, indicating the connection between amino acids.
Step 7
Draw a structural formula for the amino acid serine.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The structural formula for serine is shown as follows:
HO H
| |
H2N-C- C
| ||
CH O
| \
OH H
This represents the amino group (NH2), carboxylic group (COOH), and the side chain (CH2OH) characteristic of serine.
Join the Scottish Highers students using SimpleStudy...
