Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology 1.1 and Chem unit 4 > Proteins > Flashcards

Proteins Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Biology 101 flashcards Organic Chemistry 101 flashcards
1
Q

What is the monomer of proteins?

A

amino acids

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

What elements do proteins contain?

A

carbon, hydrogen, oxygen, nitrogen

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

What 2 elements could possibly be found in a protein?

A

sulphur, phosphorous.

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

What is the polymer of proteins?

A

Polypeptide - chain of amino acids

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

What element is always in a protein?

A

Nitrogen

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

What is this group called?
(-NH2)

A

Amine group

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

What is this group called?
(-COOH)

A

Carboxyl group

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

What is the group that changes in the amino acids called?

A

Variable R group

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

What is being defined here?
(A reaction takes place between the amino group of one amino acid and the carboxyl group of another)

A

Peptide bond

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

Describe a peptide bond

A

A reaction takes place between the amino group of one amino acid and the carboxyl group of another

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

What’s the term for two amino acids bonding?

A

Dipeptide

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

What reaction takes place during the bonding of amino acids?

A

Condensation reaction - a molecule of water is formed

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

If a condensation reaction occurs in amino acids, what bond is formed?

A

Peptide bond

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

Describe the formation of a dipeptide.

A

Carboxyl group + Amine group –> peptide bond + water molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many protein structures are there, list them.

A

4 - primary, secondary, tertiary and quaternary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many types of secondary protein structures are there?

A

alpha helix,
beta-pleated sheet

17
Q

Where are the hydrogen bonding in a secondary protein structure?

A

=O on -CO groups and the -H on -NH groups

18
Q

Long __________ chain twists into ____ shape

A

polypeptide, 3D

19
Q

What is a protein primary structure?

A

singular peptide chain

20
Q

What bonds are present in a tertiary protein structure?

A

Ionic bonds, hydrogen bonds, disulfide bond

21
Q

A tertiary protein structure: the shape is held in place by hydrogen, ionic and disulfide bonds together with ________________.

A

hydrophobic interactions

22
Q

What does a quaternary protein structure consist of?

A

2 or more tertiary bonded together

23
Q

Give one example of a quaternary protein structure in the human body

A

haemoglobin

24
Q

How many polypeptide chains does haemoglobin consist of?

A

4

25
Q

What is the iron-containing group called in the centre of each polypeptide chain in haemoglobin?

A

Haem

26
Q

Describe why the maximum number of oxygen molecules each haemoglobin molecule can pick up is four.

A

Each haem group contains an iron ion (Fe2+). Since each iron ion can bond with one molecule of oxygen, each haemoglobin can pick up four oxygen molecules.

27
Q

What is the fibrous proteins we must learn?

A

Collagen

28
Q

What’s the formation of parallel chain in collagen?

A

Polypeptides laid down in parallel chains

29
Q

Describe 3 properties of fibrous proteins.

A

very stable, insoluble and strong

30
Q

Describe a collagen fibre - the polypeptide chains and bonds

A

Three polypeptide chains and each is twisted in the form of alpha-helix. Hydrogen bonds hold three strands in place.

31
Q

Pair globular proteins/Fibrous proteins with soluble in water/insoluble in water

A

Globular are soluble in water.
Fibrous are insoluble in water.

32
Q

globular proteins/Fibrous proteins
stable/not stable

A

Globular proteins are easily changed chemically therefore not stable.
Fibrous are stable and tough

33
Q

globular proteins/Fibrous proteins
metabolic functions/structural functions

A

Globular - metabolic functions.
Fibrous - structural functions

34
Q

What solution is used to test for the presence of protein and what are the colour change?

A

Biuret reagent
pale blue to lilac/purple

35
Q

Describe what is meant by QUALITATIVE

A

results indicates whether food group is present or not

36
Q

Describe what is meant by SEMI-QUSNTITATIVE

A

different colour changes can indicate different concentrations

37
Q

Describe what is meant by QUANTITATIVE.

A

actual value for the concentration of food group present

38
Q

Primary protein structure - what determines the sequence of amino acids?

A

Base sequence on a strand if the DNA molecule

Biology 1.1 and Chem unit 4 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions