At each step of its ascent, the DNA strand turns:

1. 3.4°

2. 34°

4. 3.6°

4. 36°

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The substrate has to go through a much higher energy state or transition state in case of:

1. Exothermic reactions only

2. Endothermic reactions only

3. Both exothermic and endothermic reactions

4. Neither exothermic nor endothermic reactions

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Name the enzymes that catalyze removal of groups from substrates by mechanism other than hydrolysis leaving double bonds:

1. Transferases

2. Lyases

3. Isomerases

4. Ligases

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When the co-factor is removed from the enzyme, the catalytic activity:

1. is lost.

2. is reduced.

3. is increased.

4. is unaffected.

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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

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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

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Populations subsisting primarily on corn would likely to suffer from:

1. PEM

2. Pellagra

3. Bleeding disorders

4. Beri beri

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In the 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

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Where would you expect to find serine and alanine amino acids in a globular protein in aqueous solution?

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

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

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

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

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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

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