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BIOCHEM > 1M PROTEIN AND ITS STRUCTURE > Flashcards

1M PROTEIN AND ITS STRUCTURE Flashcards

1
Q

The joining together of 2 amino acids to form a dipeptide involves the reaction between?

A

an amino group and carboxyl group

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2
Q

What type of non covalent bond stabilizes the alpha helix and the beta pleated sheets structure of protein

A

Hydrogen bond

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3
Q

What are the two types of secondary structure found in protein?

A

alpha helix and Beta pleated sheet

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4
Q

Below are the examples of defense proteins Except?

A

Hemoglobin

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5
Q

Determine the structural level associated with each protein characteristics
( Sequence of amino acids in a protein chain)

A

primary Structure

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6
Q

Which of the ff. statements concerning protein structure is correct?

A

Amino acids are connected to each other through peptide bonds

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7
Q

Below are types of interactions that stabilizes tertiary structure of proteins EXCEPT

A

Metallic Bonds

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8
Q

This type of protein functions as carrier of molecules or ions across membranes or between cells, examples of which is hemoglobin?

A

transport proteins

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9
Q

These refers to proteins that has changed its physical, chemical and biological properties characterized by unfolding of the molecule from the previous configuration due to splitting of peptide linkages and cross-links that connect the peptide chains.

A

derived proteins

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10
Q

This type of proteins provide protection and support that have very specialized properties.

A

Structural proteins

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11
Q

Wool is primarily made up of

A

Protein

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12
Q

Denaturation of a protein

A

Disrupts the secondary, tertiary or quaternary structure of a protein

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13
Q

Proteins are polymers in which

A

Unbranched chains of amino acids are present

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14
Q

This type of protein is consists of several peptide chains twisted together to form stiff rod and generally insoluble in body fluids and give strenght to tissue

A

Fibrous Protein

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15
Q

R group interaction between which of the ff pairs of amino acid produces a disulfide bond

A

Cysteine-cysteine

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16
Q

Heavy metals denature proteins

A

Disrupting disulfide bond

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17
Q

What is formed when two (2) cysteine molecules are oxidized

A

Disulfide bridge

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18
Q

What do you call the prosthetic group of hemoglobin

A

heme

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19
Q

How many peptide linkages are present in tripeptide

A

two

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20
Q

The conjugated protein consists 2 parts what do you call the protein part

A

Apoprotein

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21
Q

Which of the ff. biochemically important small peptides functions as an antioxidant

A

Glutathione

22
Q

When Amino acids join together in a long chain, the sequence starts from?

A

N-terminal

23
Q

The function of myoglobin is to

A

carry oxygen in the muscles

24
Q

These are proteins that are involved in all cell movements

A

contractile proteins

25
Q

To which of the ff levels of protein structures is the sequence of amino acids in a protein directly related

A

Primary

26
Q

What do you call the angle of rotation between the N and the alpha carbon in a peptide bond?

A

Phi angle

27
Q

How many diff. tripeptides can be formed from two molecules of leucine glutamic acid

A

five

28
Q

Which among the choices below is an example of storage protein

A

Ferritin

29
Q

Quaternary structure is possible for a protein only when:

A

Two or more protein chains are present

30
Q

Which of the following statements concerning the tripeptide Val- Ala- Gly is correct

A

The N terminal amino acid residue is Gy

31
Q

The shape of proteins is determined by the sequence of the amino acids and has the lowest free enrgy. What is the other term of the final shape of protein structure

A

Conformation

32
Q

The non-amino acid portion of a conjugated protein is called a

A

Prosthestic group

33
Q

Below are constraints in the formation of helical structures in protein EXCEPT

A

Proline

34
Q

The complete hydrolysis of a protein produces mixture of

A

free amino acid

35
Q

In a sickle cell anemia, the hemoglobin molecules

A

clump together into insoluble fibers

36
Q

Which of the ff. is an incorrect characterization for the protein hemoglobin

A

Simple protein

37
Q

This structure of protein refers to the unique 3-D conformations that globular proteins assumes as they fold onto their native (biologically active) structure

A

Tertiary structure

38
Q

Which of the ff types of interactions contribute to protein tertiary structures.

A

more than one correct response

39
Q

Storage proteins

A

ferritin

40
Q

Regulatory proteins

A

insulin

41
Q

Stress response protein

A

cytochrome P`

42
Q

Transport protein

A

hemoglobin

43
Q

Enzymatic protein

A

Phenylalanine

44
Q

Structural protein

A

Elastin

45
Q

Globular protein

A

egg albumin

46
Q

Derived protein

A

peptones

47
Q

there are protein that consists of chain of amino acids that are coiled and tightly packed together in a spherical shape

A

Globular proteins

48
Q

Hemoglobin is an example of protein with

A

two proteins chains held together

49
Q

in the tetrapeptide chain Phe-Gln-trp - His, the terminal c amino acid is

A

His

50
Q

what holds the structure of protein together during the process called folding

A

Non-covalent bond

51
Q

hemoglobin has a total of - in the quaternary structure

A

4

BIOCHEM (7 decks)

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