Lecture 2

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

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Front (Question)

building blocks of proteins

Back (Answer)

Amino acid

Front (Question)

is attached to four different substituents

Back (Answer)

Alpha-carbon

Front (Question)

Categories of amino acid

Back (Answer)

• Polar • Electrically charged amino acids • Nonpolar

Front (Question)

What are the polar amino acids

Back (Answer)

STAG C - Serine - Threonine - Asparigine - Glutamine - Tyrosine - Cystein

Front (Question)

Types of non-polar/hydrophobic amino acid

Back (Answer)

“Glorious Altar Vanishes, Leaving Islands, Merry Princes, Phony Tricks.” - Glycine - Alanine - Valine - Leucine - Isoleucine - Methionine - Proline - Phenylalanine - Tryptophan

Front (Question)

Negatively charged R groups

Back (Answer)

Aspartic acid, Glutamic Acid

Front (Question)

Positively charged R groups

Back (Answer)

Lysine, Arginine, Histidine

Front (Question)

• Formed by dehydration synthesis • Allows free rotation of attached atoms > various shapes of polypeptide - Holds amino acids

Back (Answer)

Peptide Bond

Front (Question)

Unbranched chain of amino acids

Back (Answer)

Polypeptide chain

#10

Front (Question)

May consists of one or more polypeptide chains

Back (Answer)

protein

#11

Front (Question)

the primary structure of a protein is a sequence of amino acids linked together by peptide bonds, forming a polypeptide

Back (Answer)

Primary structure

#12

Front (Question)

Local regions of the resulting polypeptide can then be coiled into a a-helix.

Back (Answer)

Secondary structure

#13

Front (Question)

Regions of secondary structure associate with each other in a specific manner to form this structure The final folding of the polypeptide

Back (Answer)

Tertiary structure

#14

Front (Question)

For multimeric proteins, the quarternary structure describes the association of two or more polypeptides as they inetract to form the final structure. a functional protein

Back (Answer)

Quarternary structure

#15

Front (Question)

What is the difference between peptides and proteins in terms of amino acid chain length?

Back (Answer)

Peptides: fewer than 50 amino acids Proteins: more than 50 amino acids

#16

Front (Question)

a peptide that has 2 amino acids

Back (Answer)

Dipeptides

#17

Front (Question)

a peptide that have 3 amino acids

Back (Answer)

tripeptides

#18

Front (Question)

A peptide that have more than 10 amino acids

Back (Answer)

Polypeptides

#19

Front (Question)

Two folds of Secondary structure

Back (Answer)

• α-helix • β pleated sheet

#20

Front (Question)

Spiral turn of α-helix

Back (Answer)

3.6 amino acids

#21

Front (Question)

α-helix is symbolized by ______ ______

Back (Answer)

Helical ribbon/coil

#22

Front (Question)

• Most commn 2° structure • stabilized by almost linear hydrogen bonds between the NH and CO groups of residues • with disulfide linkages (S–S)

Back (Answer)

alpha-helix

#23

Front (Question)

• the peptide planes are arranged like a regularly pleated sheet • H-bonds can only form between neighboring chains within a sheet

Back (Answer)

β-pleated sheet

#24

Front (Question)

gives a specific three dimensional shape to the polypeptide chain

Back (Answer)

• tertiary structure