(a) State four functions of proteins, giving a named example of each.

Proteins can function as 

1. Biological Catalysts: enzymes that decrease the activation energy of a reaction and facilitate the progression of chemical reactions

2. Hormones: proteins can function as hormones, normally produced by a gland. Hormones act as chemical messages by binding to a specific receptor and activate a particular cellular pathway. 

3. Channels/Pumps: proteins can comprise of strucrures located in the cell lipid bilayer. They allow for different types of molecules and compounds to exit or enter a cell. 

4. Structural proteins: These proteins are found in different tissues in our body but also comprise protein structures of prokaryotic/eukaryotic cells such as the flagellum, used for cell motility. Structural proteins can also be a part of human tissues, including keratin found on nails and hair cuticles.  

Answered by Tatiana S. Biology tutor

16749 Views

See similar Biology IB tutors

Related Biology IB answers

All answers ▸

What is the role of auxin in plant phototropism?


Explain the events that occur in cells that result in the production of genetically identical nuclei (8 marks)


List three differences and three similarities between eukaryotic and prokaryotic cells


How does DNA replication take place?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences