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14 Jun 2018

The interactions between amino acids are major factors in determining the shape of a protein. These interactions can be effected by the environment surrounding a protein. Explain how the temperature, pH, ion concentration, and hydrophilic or hydrophobic properties of the environment may impact the shape of a protein in a particular organism, and therefore its function.

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Jarrod RobelLv2

15 Jun 2018

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Related questions

Protein Structure

a.Different function of proteins and examples:

b. Protein building blocks:

1. atomic composition of building block:

2. "parts" or "functional groups" of the building block:

c. Importance of side chain (R group):

d. Hydrophobic amino acids characteristics:

e. Hydrophilic amino acids characteristics:

f. Charged amino acids characteristics

Copy and complete the table below regarding the characteristics and which groups in the polypeptide interact together at each structural level of the protein.

	characteristics	groups interacting
Primary structure
Secondary structure
Tertiary structure
Quartenary structure

Value: 2

Choose the correct statement(s). You may choose more than one answer.

[mark all correct answers]
a. Proteins are the building blocks of amino acids.

b. Enzymes are a type of protein.

c. Quartenary structure consists of two or more polypeptide chains interacting.

d. Amino acids are made of carbon, hydrogen, nitrogen and phosphorus.

e. The primary structure of a protein is formed due to the interaction of side groups.

Value: 3

Put the following statements regarding the structural levels of a protein formation in the correct order.

Below is a sequence of events. Place them in the order they should occur, number 1 being the first item. Select the step number from the drop down next to each item.

Items to order:

1. Individual amino acids are bonded together via peptide bonds.

2. Two or more polypeptide chains interact via bonds.

3. Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.

4. Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.

Value:4

Put the following statements regarding the structural levels of a protein formation in the correct order

Individual amino acids are bonded together via peptide bonds.	1 2 3 4
Two or more polypeptide chains interact via bonds.	1 2 3 4
Hydrogen bonds form between neighboring amino acids within a polypeptide chain allowing the chain to coil or form pleated sheets.	1 2 3 4
Side groups (R) of the individual amino acids interact with each other allowing the protein to assume its three dimensional shape.	1 2 3 4

Value: 5

Hydrophobic amino acids will be found _______________.

a. In the interior (inner core) of a protein, away from the watery environment.

b. in the interior of a plasma membrane.

c. Both A and B

d. Neither

Value: 6

A protein's function is defined by ____________.

a. enzymatic reactions

b. it's shape.

c. chain of nucleotides.

d. the presence of carbon and hydrogen.

Value: 7

Which of the following is NOT considered a protein function?

a. transport of substances across membrane

b. enzymatic reactions

c. provides structural support

d. carries genetic information

1. Amino acid changes in the primary structure of the protein arenot capable of causing changes in the
overall shape of a protein.
a.) True
b.) False

2. An alpha helix:
a.) is destabilized by the amino acid alanine
b.) can only form by hydrogen bonding between different polypeptidechains
c.) can only form when cysteines form disulfide bridges within thisstructure
d.) all of the above
e.) none of the above

3. What will likely happen if two aspartates at pH 5 are next toeach other in a polypeptide chain?
a.) The side chains of these amino acids will be uncharged andthere will be no effect.
b.) The side chains of these amino acids will be charged and theywill attract each other.
c.) The side chains of these amino acids will be charged and theywill repel each other.
d.) Not enough information is given to determine the effect.

4. Consider the amino acid phenylalanine. Which of the followingbest describes where you predict this
amino acid would be found?
a.) This amino acid is hydrophobic and would be on the surface of aprotein that is in the middle
of a membrane.
b.) This amino acid is hydrophilic and would be on the surface of aprotein that is in the middle
of a membrane.
c.) This amino acid is hydrophobic and would be in the interior ofa protein that is in the middle
of a membrane.
d.) This amino acid is hydrophilic and would be in the interior ofa protein that is in the middle of
a membrane.
e.) Not enough information is given to determine.

5. The difference between fetal and adult hemoglobin with regard tooxygen binding occurs because fetal
hemoglobin has an amino acid substitution in one of its chains thatresults in a histidine being replaced by a
serine.
a.) True
b.) False

1. Enzyme A is an enzyme that catalyzes the reaction of glucose + fructose to sucrose by coupling this +âG reaction with the -âG hydrolysis of ATP. A chemical is discovered that keeps Enzyme A from entering its transition state. What will happen when this enzyme is added to a solution containing ATP and equal parts of glucose, fructose, and sucrose?

A. All of the glucose + fructose will be converted to sucrose.

B. All of the sucrose will be converted to glucose + sucrose.

C. The glucose + fructose will reach their equilibrium constant with sucrose.

D. The ATP will phosphorylate the glucose to produce sucrose while leaving fructose.

2.Which of the following does not contribute to how an individual protein functions?

A. sequence of amino acids.

B. The quaternary structure of that protein.

C. The shape of the binding site.

D. The number and position of charged and polar amino acids.

3. In order to perform functions that proteins alone cannot do, proteins can:

A. Incorporate other molecules into their structure.

B. bind to other proteins to form a complex.

C. signal to non-protein enzymes to perform the function.

D. undergo a conformational change to perform the function.

4. Which of the following is not a function of intrinsically disordered sequences in a protein?

	A. Acting as substrates for chemical interactions.
	B. Increasing variation in a protein by swapping amino acids.
	C. Providing elasticity to tissues.
	D. Flexing to enable interactions between domains.