1M PROTEIN AND ITS STRUCTURE

Question 1

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

Answer 1

an amino group and carboxyl group

Question 2

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

Answer 2

Hydrogen bond

Question 3

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

Answer 3

alpha helix and Beta pleated sheet

Question 4

Below are the examples of defense proteins Except?

Answer 4

Hemoglobin

Question 5

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

Answer 5

primary Structure

Question 6

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

Answer 6

Amino acids are connected to each other through peptide bonds

Question 7

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

Answer 7

Metallic Bonds

Question 8

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

Answer 8

transport proteins

Question 9

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.

Answer 9

derived proteins

Question 10

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

Answer 10

Structural proteins

Question 11

Wool is primarily made up of

Answer 11

Protein

Question 12

Denaturation of a protein

Answer 12

Disrupts the secondary, tertiary or quaternary structure of a protein

Question 13

Proteins are polymers in which

Answer 13

Unbranched chains of amino acids are present

Question 14

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

Answer 14

Fibrous Protein

Question 15

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

Answer 15

Cysteine-cysteine

Question 16

Heavy metals denature proteins

Answer 16

Disrupting disulfide bond

Question 17

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

Answer 17

Disulfide bridge

Question 18

What do you call the prosthetic group of hemoglobin

Answer 18

heme

Question 19

How many peptide linkages are present in tripeptide

Answer 19

two

Question 20

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

Answer 20

Apoprotein

Question 21

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

Answer 21

Glutathione

Question 22

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

Answer 22

N-terminal

Question 23

The function of myoglobin is to

Answer 23

carry oxygen in the muscles

Question 24

These are proteins that are involved in all cell movements

Answer 24

contractile proteins

Question 25

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

Answer 25

Primary

Question 26

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

Answer 26

Phi angle

Question 27

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

Answer 27

five

Question 28

Which among the choices below is an example of storage protein

Answer 28

Ferritin

Question 29

Quaternary structure is possible for a protein only when:

Answer 29

Two or more protein chains are present

Question 30

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

Answer 30

The N terminal amino acid residue is Gy

Question 31

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

Answer 31

Conformation

Question 32

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

Answer 32

Prosthestic group

Question 33

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

Answer 33

Proline

Question 34

The complete hydrolysis of a protein produces mixture of

Answer 34

free amino acid

Question 35

In a sickle cell anemia, the hemoglobin molecules

Answer 35

clump together into insoluble fibers

Question 36

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

Answer 36

Simple protein

Question 37

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

Answer 37

Tertiary structure

Question 38

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

Answer 38

more than one correct response

Question 39

Storage proteins

Answer 39

ferritin

Question 40

Regulatory proteins

Answer 40

insulin

Question 41

Stress response protein

Answer 41

cytochrome P`

Question 42

Transport protein

Answer 42

hemoglobin

Question 43

Enzymatic protein

Answer 43

Phenylalanine

Question 44

Structural protein

Answer 44

Elastin

Question 45

Globular protein

Answer 45

egg albumin

Question 46

Derived protein

Answer 46

peptones

Question 47

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

Answer 47

Globular proteins

Question 48

Hemoglobin is an example of protein with

Answer 48

two proteins chains held together

Question 49

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

Answer 49

His

Question 50

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

Answer 50

Non-covalent bond

Question 51

hemoglobin has a total of - in the quaternary structure

Answer 51

4