Help 1. The water surface tension is a result of the cohesive nature of water mo

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1. The water surface tension is a result of the cohesive nature of water molecules.

a. True

b. False

3. The specific function of a protein is determined by the

a. Hydrophilic “head” attached to the hydrophobic “tail.”

b. Fatty acids that are joined together in the polypeptide

c. Number of disulfide bonds

d. Exact sequence of amino acids

e. Number of peptide bonds it contains.

4. To melt, ice has to:

a. Increase its heat of vaporization

b. Absorb heat from its surroundings.

c. Become less dense.

Explanation / Answer

1

Surface tension is the property of surface of a liquid which allows it to resist the external forces, due to the cohesive nature ( water molecules attached to water molecules) of water molecules.

So,the water surface tension is a result of cohesive nature of water molecules. It is True.

2.The function of a protein is determined by its structure, i.e sequence of amino acids.Proteins which share a similar Amino acid sequence usually perform similar function.So, answer if (d) exact sequence of amino acids.

3.To melt,ice has to absorb heat from its surroundings. Answer is option B.

heat of fusion deals with conversion of solid(ice) into liquid(water).so, option A is incorrect.

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