username5129378
Badges: 19
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 2 years ago
#1
Describe how the information coded on genes is used to synthesise polypeptides and how these polypeptides control the physical development of an organism.

I wrote about transcription & translation for the first bit but the mark scheme doesn't seem to include much detail on it??
Can someone help - how would u answer this q?
0
reply
flowerscat
Badges: 10
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 2 years ago
#2
A triplet of bases on DNA codes for 1 codon on messenger RNA. (Transcription)

Each codon corresponds to an anti-codon on tRNA.

Each tRNA carries one amino acid, depending on its anti-codon. A codon and anti-codon are complementary.

During transcription, one strand (template) of DNA is copied to make mRNA.

The base sequence of DNA determines the sequence of amino acids in the polypeptide.

The sequence of amino acids determines how the polypeptide folds into its tertiary structure (protein), and the function of the protein.

Some of these proteins might be Transcription Factors. TF bind to promoter regions of genes, are are important in turning genes on (allow transcription). During development, genes need to be turned on in a specific, ordered, sequence. This ensures that the different body parts are assembled in the correct order during development.

Some proteins form protein hormones. These regulate development of the body from childhood to adulthood (ie. growth hormone). They might be involved in glucose metabolism (insulin, glucagon).

Proteins can also form enzymes. Enzymes are important in catalysing biological reactions in the cell.
0
reply
username5129378
Badges: 19
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 2 years ago
#3
(Original post by flowerscat)
A triplet of bases on DNA codes for 1 codon on messenger RNA. (Transcription)

Each codon corresponds to an anti-codon on tRNA.

Each tRNA carries one amino acid, depending on its anti-codon. A codon and anti-codon are complementary.

During transcription, one strand (template) of DNA is copied to make mRNA.

The base sequence of DNA determines the sequence of amino acids in the polypeptide.

The sequence of amino acids determines how the polypeptide folds into its tertiary structure (protein), and the function of the protein.

Some of these proteins might be Transcription Factors. TF bind to promoter regions of genes, are are important in turning genes on (allow transcription). During development, genes need to be turned on in a specific, ordered, sequence. This ensures that the different body parts are assembled in the correct order during development.

Some proteins form protein hormones. These regulate development of the body from childhood to adulthood (ie. growth hormone). They might be involved in glucose metabolism (insulin, glucagon).

Proteins can also form enzymes. Enzymes are important in catalysing biological reactions in the cell.
tysm!!!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

How did The Student Room help you with your university application?

Talking to current university students (17)
18.48%
Talking to peers going through the same thing (31)
33.7%
Speaking to student ambassadors from the universities (5)
5.43%
Speaking to staff members from universities (2)
2.17%
Using the personal statement builder, library or helper service (9)
9.78%
Reading articles about what steps to take (18)
19.57%
Learning about/speaking to Student Finance England (4)
4.35%
Something else (tell us in the thread) (6)
6.52%

Watched Threads

View All