AQA A Level Biology Unit 4. All Questions & Answers.
Document Content and Description Below
What is a gene? - Ans-A section of DNA that codes for a protein and functional RNA What is a section of DNA with a particular portion called? - Ans-Locus How do they know three bases code for one am... ino acid? - Ans-Only 20 different amino acids regularly occur in proteins Each amino acid must have its own code of bases for the DNA Only 4 bases are present in DNA Three bases produce 64, more than enough to cover 20 amino acids Features of the genetic code? - Ans-Degenerate - most amino acids are coded for by more than one triplet Non-overlapping - each base is read once Universal - each triplet codes for the same amino acids in all organisms The start of a DNA sequence that codes for a polypeptide is always the same triplet - methionine - its later removed There are stop codes mark the end of a [Show More]
Last updated: 1 year ago
Preview 1 out of 12 pages
Buy this document to get the full access instantly
Instant Download Access after purchase
Add to cartInstant download
We Accept:
Reviews( 0 )
$5.00
Document information
Connected school, study & course
About the document
Uploaded On
Sep 07, 2022
Number of pages
12
Written in
Additional information
This document has been written for:
Uploaded
Sep 07, 2022
Downloads
0
Views
34
.png)
.png)
