Unit 3 Biology Headstart PreTest Proteins

the variable portion of an amino acid molecule. It can be one of twenty variations and determines the identity of the amino acid

(a)  

a biomacromolecule made of amino acid chains folded into a 3D shape

(a)  

the chemical bond linking two amino acids

• Peptide bond

• Amino bond

• Hydrogen bond

• Ionic bond

Draw and label a nucleotide

DNA is this type of molecule

(a)  

a reaction where two monomers join to form a larger molecule, producing water as a by-product

• molecular reaction

• biosynthesis reaction

• precipitation reaction

• condensation reaction

What type of secondary protein structure is represented in blue on the diagram

• Beta pleated sheets

• Standard ladders

• Alpha helices

• Random coils

 a molecule that is the smallest building block of a polymer

(a)  

Haemoglobin, which is a protein responsible for carrying oxygen in red blood cells, It is composed of four polypeptide chains bonded together, and within each of these chains, there is also an iron ion embedded within a haem prosthetic group.

Haemoglobin is one example of a protein that has a

• Primary Structure

• Secondary Structure

• Tertiary Structure

• Quatenary Structure

The linear sequence of amino acids in a protein determines its (a)    structure.