Enzymes have which of the following characteristics

Enzymes are highly specific for a particular substrate. ...

Enzymes remain unchanged during the reaction itself. ...

Enzymes are very efficient, catalyzing about 1-10,000 molecules of substrate per second. ...

Enzymes do not affect the equilibrium constant, or Keq.

Explanation:

Speed up chemical reactions.

They are required in minute amounts.

They are highly specific in their action.

They are affected by temperature.

They are affected by pH.

Explanation:

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.