Flashcards
Globular Proteins
Cards in this deck (8)
- 1Complete the sentences: Globular proteins are _______ and compact. The hydrophilic R groups tend to be pushed to the outside of the molecule - this is caused by the ________ and ________ interactions in the protein's _________ structure. This makes globular proteins ________, so they're easily transported in fluids.Globular proteins are ROUND and compact. The hydrophilic R groups tend to be pushed to the outside of the molecule - this is caused by the HYDROPHOBIC and HYDROPHILIC interactions in the protein's TERTIARY structure. This makes globular proteins SOLUBLE, so they're easily transported in fluids.
- 2What is the structure of haemoglobin?Conjugated protein
Quaternary structure = 4 polypeptide chains (2 alpha, 2 beta)
Hydrophobic R groups point to the center
Haem group on each polypeptide chain (this is a prosthetic group - not composed of amino acids)
Haem group contains Fe²⁺) - 3What is a conjugated protein?A protein with a non-protein group attached
- 4What is the function of haemoglobin?Carries oxygen around the body in red blood cells
- 5What is the function of insulinA hormone secreted by the pancreas
Helps to regulate the blood glucose level - 6What is the structure of insulin?2 polypeptide chains held together by disulphide bonds
When they're in the pancreas, 6 of these bind together to form a large, globular structure
Chain begins with a helix and ends with a section of β-pleated sheet
Hydrophilic R groups are on the outside (water soluble)
- 7What is the function of amylase?An enzyme that catalyses the breakdown of starch in the digestive system
- 8What is the structure of amylase?Made of a single chain of amino acids
Secondary structure = both alpha-helix and beta-pleated sheet sections
Most enzymes are globular proteins
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- User has deleted their subject information Flashcards on Globular Proteins, created by Deleted user on 05/03/2018.
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- Deleted user · Mar 2018
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- Mar 5, 2018
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- Created by Yinka F · Jan 24, 2018
- Copied by Yinka F · Mar 5, 2018
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