What is the term used for a protein molecule that assists in the proper folding of other proteins?

1. ubiquitin

2. chaperonin

3. vimentins

4. cyclins

Subtopic:  Proteins |
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Locomotion is a very important feature in animals. Considering the frequent need for locomotion in animals, an animal would obtain the greatest benefit from storing its energy as:

1. proteins

2. minerals

3. carbohydrates

4. fats

Subtopic:  Lipids |
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In an average composition of a cell, the maximum % of total cellular mass [after water and protein] is constituted by:

1. Carbohydrates

2. Lipid

3. Nucleic acids

4. Ions

Subtopic:  Introduction |
 63%
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Where would you expect to find serine and alanine amino acids in a globular protein in aqueous solution?

(1) Serine would be in the interior, and alanine would be on the exterior of the globular protein.

(2) Alanine would be in the interior, and serine would be on the exterior of the globular protein.

(3) Both serine and alanine would be in the interior of the globular protein.

(4) Both serine and alanine would be on the exterior of the globular protein.  

Subtopic:  Introduction to Proteins | Zwitter ion & Peptide Bond |
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The vitamin Niacin functions as a coenzyme in:

1. Nucleoprotein synthesis

2. Hydrogen transport

3. Fatty acid synthesis

4. RBC production

Subtopic:  Enzyme Cofactors |
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The six most common atoms in organic molecules are:

1. Carbon, Hydrogen, Oxygen, Helium, Calcium and Sulphur
2. Carbon, Hydrogen, Oxygen, Calcium, Magnesium and Sulphur
3. Carbon, Oxygen, Nitrogen, Sulphur, Phosphorous and Magnesium
4. Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous and Sulphur
Subtopic:  Introduction |
 75%
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The unique properties of each amino acid are determined by its particular:

1. R group

2. Amino group

3. Kinds of peptide bonds

4. Number of bonds to other amino acids 

Subtopic:  Introduction to Proteins |
 88%
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Based on the graph of an enzyme-catalyzed reaction, which of the following could be used to increase the reaction rate beyond point C?

1. increase the amount of substrate

2. add more water

3. increase the temperature

4. decrease enzyme concentration

Subtopic:  Properties of Enzymes |
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Given below is the graph showing the effect of substrate concentration on enzyme activity. In the presence of a competitive inhibitor, when the concentration of the substrate is progressively increased:

 

1. The Km value increases but the reaction will not achieve Vmax
2. The Km value increases but the reaction can ultimately achieve  Vmax
3. The Km value decreases but the reaction will not achieve Vmax
4. The Km value decreases but the reaction can ultimately achieve  Vmax
Subtopic:  Enzyme Inhibition |
 61%
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Study the primary structure of a part of a hypothetical protein and choose the correct statements:

 

I. 1 is Serine

II. 2 is sulfur containing amino acid and can be methionine

III. 3 is aromatic amino acid and can by tyrosine

IV. 4 is an acidic amino acid

1. I, II and III only

2. I, III and IV only

3. II, III and IV only

4. I, II, III and IV

Subtopic:  Proteins |
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