{ "@context": "https://schema.org", "@type": "Organization", "name": "Brainscape", "url": "https://www.brainscape.com/", "logo": "https://www.brainscape.com/pks/images/cms/public-views/shared/Brainscape-logo-c4e172b280b4616f7fda.svg", "sameAs": [ "https://www.facebook.com/Brainscape", "https://x.com/brainscape", "https://www.linkedin.com/company/brainscape", "https://www.instagram.com/brainscape/", "https://www.tiktok.com/@brainscapeu", "https://www.pinterest.com/brainscape/", "https://www.youtube.com/@BrainscapeNY" ], "contactPoint": { "@type": "ContactPoint", "telephone": "(929) 334-4005", "contactType": "customer service", "availableLanguage": ["English"] }, "founder": { "@type": "Person", "name": "Andrew Cohen" }, "description": "Brainscape’s spaced repetition system is proven to DOUBLE learning results! Find, make, and study flashcards online or in our mobile app. Serious learners only.", "address": { "@type": "PostalAddress", "streetAddress": "159 W 25th St, Ste 517", "addressLocality": "New York", "addressRegion": "NY", "postalCode": "10001", "addressCountry": "USA" } }

Polymers of life Flashcards

(14 cards)

1
Q

Amino acids can exist as Zwitterions. What is a zwitterion?

A

Where the overall charge of the molecule is zero / neutral but both a positive and negative charge exist on different parts of the molecule.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A Zwitterion can only exist at an amino acids…..?

A

Isoelectric point.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an isoelectric point ?

A

The pH where the overall charge on the molecule is neutral / zero.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If the conditions are more acidic than the isoelectric point, what happens ?

A

The NH2 group is protonated to NH3+.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If the conditions are at the isoelectric point, what happens?

A

Zwitterion is formed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

If the conditions are more alkaline / basic than the isoelectric point, what happens ?

A

COOH will lose it’s proton to form COO-.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are proteins?

A

Condensation polymers of amino acids.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the monomers in proteins joined by?

A

Peptide links / bonds.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The product of two peptides / amino acids polymerising is called:

A

Dipeptide.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is condensed out when amino acids join to make a polymer?

A

H20 ( water ).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the peptide bond / link in dipeptides formed between ?

A

The C on the COOH of one amino acid and the N on the NH2 of another amino acid.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the conditions required to perform hydrolysis on a protein to reform it’s original amino acids ?

A

Hot aqueous Hydrochloric acid of concentration 6mol/dm3, heated under reflux for 24 hours, which produces ammonium salts of the acids that then need to be neutralised using a base.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many different levels of structure do proteins have and what are they ?

A

3 : primary, secondary and tertiary.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the primary structure of a protein?

A

The sequence of amino acids / polypeptide chain.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly