Lesson 6: Proteins Flashcards
What are amino acids bonded together by?
Peptide bonds
What are the 6 roles of proteins
Storage
Transport
Regulatory (hormones)
Movement (muscles)
Structural (membranes hair nails)
Enzymes (cellular reactions)
What do antibodies do?
Proteins of the immune system that fight diseases.
What does the hemoglobin do?
A protein that transports oxygen in your blood.
What do hormones control many aspects of
Homeostasis
What do amino acids have in common?
They all have the same formula. The difference is in R remainder group. Different for each amino acid.
What do amine and carboxyl groups act like?
Amine: base
Carboxyl: Acid
How many amino acids are there and how many can our bodies make
20, our bodies can make 11 of them. The rest we must get from food. They are called Essential amino acids.
What can amino acids join together through?
Dehydration synthesis. Peptide bonds are covalent bonds.
How many amino acids are in:
Dipeptide
Polypeptide
Protein
Dipeptide: 2 amino acids joined together
Polypeptide: 2 or more aa’s joined together less than 20 or so.
Protein: Large polypeptide is called a protein usually 75 or more amino acids in length.
What are the 4 levels of organization in proteins
- Primary structure
- Secondary structure
- Tertiary structure
- Quaternary structure
What can disrupt the bonds that hold a protein in a particular shape?
Changes in temperature or pH.
What is critical to a proteins function.
It’s shape
Why does H-bonding occur in peptide bonds?
Peptide bonds are polar.
