SL Paper 3

Outline primary and quaternary protein structures.

Primary protein structure:

 

Quaternary protein structure:

 

[2]
a.

List three limiting factors of photosynthesis.

[3]
b.



Outline the differences between these two proteins.




Explain the significance of polar and non-polar amino acids in proteins.




Define quaternary structure in proteins.

[1]
a.

Outline the importance of polar and non-polar amino acids in proteins.

[2]
b.

Describe non-competitive inhibition.

[2]
c.



State two functions of proteins, giving a named example of each.

[2]
a.

Explain the significance of polar and non-polar amino acids.

[3]
b.



List three functions of proteins, giving a named example of each.

[3]
a.

Explain the significance of polar amino acids and non-polar amino acids in membranes.

[2]
b.



Distinguish between the secondary structure and tertiary structure of proteins.

[3]
b.

Explain what is meant by allosteric inhibition.

[3]
c.



The following image represents a model of ribulose bisphosphate (RuBP) carboxylase (also known as Rubisco) from the green alga Chlamydomonas.

Identify the level of protein structure of the part labelled X.

[1]
a (i).

State the role of ribulose bisphosphate (RuBP) carboxylase in the Calvin cycle.

[1]
a (ii).

Explain non-competitive inhibition.

[2]
c.