A key feature of all nucleic acids is that they have two distinctive ends: the 5' (5-prime) and 3' (3-prime) ends. This terminology refers to the 5' and 3' carbons on the sugar. For both DNA (shown above) and RNA, the 5' end bears a phosphate, and the 3' end a hydroxyl group.

Another important concept in nucleic acid structure is that DNA and RNA polymerases add nucleotides to the 3' end of the previously incorporated base. Another way to put this is that nucleic acids are synthesized in a 5' to 3' direction.

Hannah Roberts

Make a revision timetable and revise early:-)

Alisha Nawaz

How early would you suggest to start revising for exams?

Emily Cox

relax due to the fact that once it is done it is over

alex G

Drink lots of water and get lots of sleep. Also take lots of revision breaks!

Gabriel Ali

What can be the examples of good timetables. When do you wake up? When do you go and com from school? Personally, I don't know how to make timetables. The harder I try, the more I think that it becomes impossible. However timetables are great.
Warm regards,
p.s. these are only initials.
I like to be called Angali/ Jara Hassan

jh hj

Personally, think it as if its going to be the best thing ever, don't think about grades, just get it over and done with! :)

Sans Hallahan

you got to say oh wah ah ah ah

Dan Squire

Register for S-cool Revision Tools

2016 was extraordinary, but how are you feeling about your 2017?
I'm feeling lucky! It'll be good.
I'm nervous but I'm going to be OK.
There is lots to do - I'm already exhausted!
Total votes: 253