To study osmosis, a student placed a thin potato slice in a salt solution. the slice became soft and shriveled. then, he placed the shriveled slice in water. the slice regained its original shape. based on the observations, which of these statements is correct? a) the slice regained its shape because salt moved into the potato. b) the potato slice shriveled because water moved from the salt solution into the slice. c) the potato slice shriveled because water moved out of the slice into the salt solution. d) the slice regained its shape because the concentration of salt inside and outside the slice became equal.

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1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.