12 Questions
What is the primary factor that determines the acidity or basicity of an environment?
The concentration of hydrogen ions
What happens to the shape of large proteins, such as enzymes, when they are exposed to extreme pH levels?
They change shape and lose their catalytic properties
What is the purpose of ion pumps in regulating the internal pH of a cell?
To maintain a near-neutral internal pH
What is the effect of high pH on the structure of DNA?
The hydrogen bonds holding together strands of DNA are broken
What is the role of buffers in regulating the internal pH of a cell?
To maintain a near-neutral internal pH
How does a pH meter work?
By measuring the electric current produced by an acidic solution
What is the pH range that alkaliphiles typically grow well in?
pH 8 to 10.5
What is the term for the lowest pH value that an organism can tolerate?
Minimum growth pH
Which type of microorganism grows best in acidic pH conditions, especially below pH 5?
Acidophile
What is the pH range that neutrophiles prefer for optimal growth?
pH 5 to 7
What is the purpose of the experiment described in the text?
To determine the effect of pH on E. coli growth
Which of the following bacteria is an example of an extreme alkaliphile?
Agrobacterium
Learn how hydrogen ion concentration affects microbial growth, and how pH levels impact the structure of macromolecules. Discover how extreme pH affects DNA and lipids, and how microbes respond to different pH levels.
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