University:
Boston University
Course:
CAS BI 203 | Cell Biology
Academic year:

2022
Views:

369

Pages:

3
Author:

Prince Sampson

Concept 5.4: Proteins Include a Diversity of Structures, Resulting in a Wide Range of Functions • Proteins account for more than 50% of the dry mass of most cells • Protein functions include – Speeding up (catalyzing) chemical reactions – structural support – storage – transport – cellular communications – movement – defense against foreign substances Enzymes • Enzymes are a type of protein that act as catalysts to speed up chemical reactions • Enzymes can perform their functions repeatedly, functioning as workhorses that carry out the processes of life An Overview of Protein Functions (1 of 8) Enzymatic proteins Function: Selective acceleration of chemical reactions Example: Digestive enzymes catalyze the hydrolysis of bonds in food molecules. Figure 5.13 An overview of protein functions. 5-4