94 WJEC Biology AS Level - Marianne Izen - 2nd Edition (Nucleic Acids And Their Functions) Flashcards
1
Q
What does DNA contain?
A
DNA contains the information about an organism, in the form of a genetic code.
2
Q
Where is the genetic code contained?
What does the genetic code determine?
A
This code is contained in the nucleus of the cells of that organism and determines its inherited characteristics.
3
Q
Why must the genetic code be copied accurately?
A
The genetic code must be copied accurately, so that whenever the nucleus of a cell divides, it can pass on an exact copy to the nuclei of the daughter cells.
4
Q
What major functions does DNA perform?
A
DNA performs two major functions:
- it replicates in cells just before they divide
- it carries the information for protein synthesis.
5
Q
What has essential role in the functions that DNA performs?
A
RNA molecules have essential roles in these two functions.
