realSCIENCE
De La Salle College Online - INSPIRING THE IMAGINATION AND SEEKING NEW HEIGHTS
AS2.7 Gene Expression (External)
This externally assessed standard is worth 4 credits and is essential for
understanding at Level 3 and beyond.
You will cover a large amount of content and the teaching  component will take
approximately 10 weeks of class time.

The following is a comprehensive list of all the key areas that you must cover for AS2.7. This topic will introduce a lot of new terminology and concepts.

Gene expression involves a selection from the following biological ideas and processes:

  • nucleic acid structure and nature of the genetic code
  • significance of proteins
  • protein synthesis
  • the determination of phenotype via metabolic pathways
  • effect of environment on genotype through mutations
  • effect of environment on expression of phenotype. 

Biological ideas and processes relating to nucleic acid structure and nature of the genetic code are selected from:

  • molecular components and their role in carrying the genetic code: nucleotide monomers, deoxyribose and/or ribose sugar, phosphate, nitrogenous bases, complementary base pairing resulting in coding and template strand
  • nature of the genetic code including triplets, codons and anticodons
  • redundancy due to degeneracy within the code. 

Biological ideas and processes relating to the significance of proteins are selected from:

  • proteins as the products of gene expression: DNA ==> mRNA ==> polypeptide or protein
  • identification of one gene ==> one polypeptide relationship
  • significance of proteins is limited to their structural and catalytic role in living things. 

Biological ideas and processes relating to protein synthesis are selected from:

  • the role of DNA sequence in determining the structure of a protein and how that protein is produced (transcription and translation)
  • the role of enzymes in controlling the process (specific names of enzymes are not required).

Practice papers

Bio 2.7 Questions 12.doc
click to download
Bio 2.7 Questions 13.docx
click to download
Biology 2.7 Questions 14.docx
click to download
Biology 2.7 ANSWERS PRELIMS 2015.docx
click to download

answers for papers

Bio 2.7 Assess sched 12_1.doc
click to download
Bio 2.7 Assessment schedule 13.docx
click to download
Biology 2.7 Assess Sched 14.docx
click to download

videos

What is DNA?
Proteins
Metaboic Pathways
Nucleic Acids
Transcription & Translation
Environment & Phenotype
DNA and RNA I
Genotype Expression
Mutation
DNA and RNA II
Biological Molecules
Where do genes come from?