Unit 6 - Nucleic acids and protein synthesis (9700)
Summary
Summary Mark Scheme notes for Topic 6 - Nucleic acids and Protein synthesis (CIE 9700 A Level Biology/AS Level Biology)
12 views 0 purchase
Course
Unit 6 - Nucleic acids and protein synthesis (9700)
Institution
CIE
Looking for CIE A Level Biology notes? These Nucleic acids and Protein synthesis notes are compiled directly from CIE 9700 AS Level Biology mark schemes. With every single specification point labelled and covered, simply memorising these notes guarantees you will get top marks on the day. These poi...
Unit 6 - Nucleic acids and protein synthesis (9700)
All documents for this subject (12)
Seller
Follow
chengy543
Content preview
NOTES: Italics indicates NOT from the mark scheme (often means no
mark schemes relating to the spec point). These are taken instead
from the CIE A Level textbook, which occasionally includes extra
detail to help my own understanding. All others are directly copied
from CIE 9700 mark schemes.
Mark scheme abbreviations: I = ignore, A = accept, R = reject. A
semi-colon “;” separates marking points, which are sometimes
numbered. “AVP” = any valid point. See the start of any mark
scheme for full abbreviations.
6. Nucleic acids and protein synthesis
Helpful tip: remember ‘y’ for pyrimidines. So cytosine, thymine are
pyrimidines. Remember thymine and uracil have very similar
structures (both pair with adenine). Uracil is also a pyrimidine. So
pyrimidines: C, T, U. (Purines: A, G)
Pyrimidines are single rings, purines are two/double ringed.
Nucleotide structure : nitrogenous base, pentose sugar
(deoxyribose or ribose), phosphate group
ATP structure: adenine, ribose (adenosine), three phosphates
mRNA structure: single polynucleotide strand. (i.e. many
nucleotides joined together in one strand)
structure of a DNA molecule as a double helix:
• the importance of complementary base pairing between the 5′ to 3′
strand and the 3′ to 5′ strand (antiparallel strands)
• differences in hydrogen bonding between C–G and A–T base pairs
C≡G (3), A=T (2)
• linking of nucleotides by phosphodiester bonds
Semi-conservative replication:
1 DNA (double helix / molecule) unwinds ; by DNA helicase
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller chengy543. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.73. You're not tied to anything after your purchase.
