2.1.2 Biological Molecules – Amino Acids Flashcards
(15 cards)
How may different amino acids are there?
20
What makes one amino acid different from another?
It’s R group
Draw the structure of an amino acid
Draw the structure of an amino acid
- May or may not contain sulphur
- May by hydrophobic or hydrophilic
- May be positively or negatively charged
What is the name for the molecule formed when two amino acids join together?
A dipeptide
What is the name for the molecule formed when many amino acids join together?
A polypeptide
What type of bond is formed between two amino acids?
A peptide bond
What type of reaction joins two amino acids together?
A condensation reaction
What type of reaction breaks two joined amino acids apart?
A hydrolysis reaction
How do plants obtain amino acids?
They eat proteins and then break them down into amino acids, which they can use.
How do animals obtain amino acids?
They eat proteins and then break them down into amino acids, which they can use.
Which reagent (chemical) is used to test for proteins?
Biuret
What is the positive result for the Biuret test?
Purple
What is the negative result for the Biuret test?
Blue
What is the method for the Biuret test?
- Add protein (in a liquid form) to a test tube.
- Add an equal volume of Biuret solution and shake to mix.
