You are presented with the question "Why do cells secrete acids?" and the following answer choices: 
- Make money
 - resistance activities
 - allow growth
 - Plant growth is reduced
 - Break down proteins
 - Hurt things
 - increases a body's strength
 - Help friends

Now knowing that cells secrete acids and bases to maintain the proper pH for enzymes to work and enzymes help to break down proteins so that the bacteria can do their thing better, choose the best answer.


 

     Break down proteins    