The cytoplasmic pH of a typical lymphocyte (a subset of white blood cells) is 7.

Question

The cytoplasmic pH of a typical lymphocyte (a subset of white blood cells) is 7.14 while the average pH within a lysosome is 4.50. What is the [H+] in the cytoplasm and lysosome, respectively?

1.14 x 10-7 and 1.45 x 10-4

7.24 x 10-8 and 3.16 x 10-5

7.14 x 10-7 and 4.5 x 10-4

7.24 x 10-7 and 3.16 x 10-4

3.16 x 10-5 and 7.24 x 10-8

3.16 x 10-10 and 1.38 x 10-7

1.38 x 10-7 and 3.16 x 10-10

1.14 x 10-7 and 1.45 x 10-4

7.24 x 10-8 and 3.16 x 10-5

7.14 x 10-7 and 4.5 x 10-4

7.24 x 10-7 and 3.16 x 10-4

3.16 x 10-5 and 7.24 x 10-8

3.16 x 10-10 and 1.38 x 10-7

1.38 x 10-7 and 3.16 x 10-10

Explanation / Answer

Lysosome contains a variation of enzymes that hydrolyse proteins, nucleic acids, carbohydrates and lipids. The enymes present in Lysosomes work best in acidic pH, thus they are referred as Acid hydrolases. The pH in lysosome is aroung5 and that of Cytoplasm is about 7 i.e. neutral. Therefore, the H+ concentration will be 7.14X10-7

. and 4.5X10-4

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