Unit 4.7 Amino Acids (re-run)

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

Define amphoteric

Back (Answer)

Can react both as base and acid

Front (Question)

Define zwitterion (3 things)

Back (Answer)

• Dipolar ion • Both positive & negative charge • Resulting in neutral molecule

Front (Question)

How can u tell it’s an α-amino acid? (3 things)

Back (Answer)

• H2N on the left • COOH on the right • Quite obscure…

Front (Question)

What classifies an α-amino acid? (2-way)

Back (Answer)

• It’s on the α-carbon • to the carboxylic acid

Front (Question)

What is the general formula for an α-amino acid?

Back (Answer)

CHR(NH2)COOH

Front (Question)

Draw displayed formula of general formula for an α-amino acid (Whiteboard)

Back (Answer)

Lol

Front (Question)

What is the simplest amino acid? (2-tings)

Back (Answer)

• Glycine • R group is just H

Front (Question)

Draw structural formula of glycine “3D” (Whiteboard

Back (Answer)

Stage is urs per se?

Front (Question)

How does the presence of an amine group allow amino acids to also act as a base? (2-way)

Back (Answer)

• Lone pair on nitrogen can act as a base • Accepting a proton/donating an electron pair

#10

Front (Question)

What allows the amino acid to be amphoteric?

Back (Answer)

• Base (Nitrogen lone pair) • Acid (Carboxylic acid prob)

#11

Front (Question)

Show with a diagram, the amphoteric behaviour glycine State what the result is?

Back (Answer)

Alas, the zwitterion

#12

Front (Question)

Draw the zwitterion version of alanine (R=CH3) (Whiteboard) (Just use that as foundation incase of other “zwitterions”)

Back (Answer)

The stage is always urs

#13

Front (Question)

Explain whether m.p of amino acid is high or low? (3 things)

Back (Answer)

• Much higher up • Can form ionic bonds with neighboring ions • Due to charge

#14

Front (Question)

How are amino acids also soluble in water? (3 things)

Back (Answer)

• Can do hydrogen bonds • They’re polar molecules • Dissolves within water

#15

Front (Question)

How can different amino acids have different solubility? (1 thing, 1 imp)

Back (Answer)

• Based on chain length • Length ∝ 1/solubility

#16

Front (Question)

Define isoelectric points (2-way)

Back (Answer)

• The pH value at which • the molecule carries no electric charge

#17

Front (Question)

The biggest regret, not listening

Back (Answer)

I’ll somehow draw this BUT, hopefully that next specific lesson comes in clutch man

#18

Front (Question)

What is a zwitterion?

Back (Answer)

Idk the full real answer… BUT: - seems to be the “isoelectric point”??? - In the amino acids, the ones with an electron negative O- (Dipole type shi) - Involves with the different pH (acidic and alkaline type shi)

#19

Front (Question)

How to draw the zwitterion versions of an amino acid? (2-way)

Back (Answer)

• Turn their OH • … an O- • More H into the N (+NH3)

#20

Front (Question)

What may happen to a zwitterion of an amino acid if turned more acidic? (2 things)

Back (Answer)

• O- to OH • NH2 to N+H3

#21

Front (Question)

What may happen to a zwitterion of an amino acid if turned more alkaline? (2 things)

Back (Answer)

• O- stays the same • N+3 to NH2

#22

Front (Question)

Show me the amide group?

Back (Answer)

-NH-C(=O)-

#23

Front (Question)

What’s the amide group called in the “biology section”?

Back (Answer)

Dipeptides

#24

Front (Question)

How is an amide group formed? (or dipeptide if u want)

Back (Answer)

• 2 amino acids joining up • Via condensation reaction