7)State whether the following sentences are true or false. Rewrite them if they are false.
a) Every chemical reaction taking place in cells is regulated by a specific enzyme.
b) Enzymes work inside cells only.
c) Enzymes are carbohydates
d) An active site is the part of the enzyme which combines with substrates
a) Every chemical reaction taking place in cells is regulated by a specific enzyme.
To determine the truth or falsehood of this statement, we need to understand the role of enzymes in regulating chemical reactions in cells. Enzymes are proteins that act as catalysts, meaning they speed up chemical reactions without being consumed in the process. Enzymes are involved in many cellular processes, but not all chemical reactions in cells are regulated by specific enzymes. Some reactions may be spontaneous and do not require an enzyme for catalysis.
Therefore, the statement is FALSE.
Rewrite: Not all chemical reactions taking place in cells are regulated by a specific enzyme.
b) Enzymes work inside cells only.
To determine the truth or falsehood of this statement, we need to understand the locations where enzymes can function. Enzymes are mainly found inside cells, where they catalyze various biochemical reactions. However, enzymes can also function outside of cells, for example, in the digestive system, where they help break down food.
Therefore, the statement is FALSE.
Rewrite: Enzymes can work both inside and outside of cells.
c) Enzymes are carbohydrates.
To determine the truth or falsehood of this statement, we need to understand the chemical composition of enzymes. Enzymes are not carbohydrates but rather proteins. Proteins are composed of amino acids joined together in a specific sequence, giving them their unique structure and function. Carbohydrates, on the other hand, are composed of sugar molecules.
Therefore, the statement is FALSE.
Rewrite: Enzymes are proteins, not carbohydrates.
d) An active site is the part of the enzyme which combines with substrates.
To determine the truth or falsehood of this statement, we need to understand the concept of an active site in enzymes. An active site is a specific region of the enzyme where the substrate(s) bind to undergo the catalytic reaction. The active site provides a precise environment for the reaction to occur by bringing the substrates into close proximity and facilitating the reaction.
Therefore, the statement is TRUE.
No rewrite is needed for this statement.