Question

Which statement(s) describes dehydration synthesis? Select all that apply.

1. Egg whites changing from a clear liquid to a solid white.   

2. Forming deoxyribonucleic acid by linking nucleotides.   

3. Breaking proteins into amino acids.   

4. Linking glucose molecules into glycogen.   

Linking glucose molecules into glycogen.   

Answer 1

ANSWER -

dehydration synthesis is the formation of complex products when two simple compund react with each other with release of water. one have to keep in mind that two reactants make one complex product , there is no breakdown , instead synthesis take place with release of water.

here in the above question, option 2 and option 4 are CORRECT, while the other two options are incorrect,

in egg whites there is breakdown of protein molecules when heat is applied, therefore, it is not dehydrogenation synthesis, while when polypeptide is broken down into simpler amino acids, it results into breakdown and thus it is not a synthesis reaction

while the other two are synthesis reaction, as there is release of water when monomers are joined to form polymers and nucleotides react together .

hence, option 2 and 4 are correct