At 20°C the enzyme that catalyzes the breakdown of polysaccharides functions at 1 reaction every 20 microseconds. If this enzyme catalyzes hydrolysis reactions of a very long polysaccharide molecule for 120 microseconds, into how many segments would this long polysaccharide be cut?

Seven segments

Explanation:

As given in the question -  

After every  twenty microseconds one reaction occurs i.e breakdown of polysaccharides.  

This means that after every  twenty microseconds the polysaccharides is broken down  

The total time for this hydrolysis reaction is   micro seconds

Thus , there will be six phases of division each after every  twenty microseconds

After 1st  twenty microseconds , total segments is equal to two

After 2nd  twenty microseconds , total segments is equal to three

After 3rd  twenty microseconds , total segments is equal to four

After 4th twenty  microseconds , total segments is equal to five

After 5th twenty  microseconds , total segments is equal to six

After 6th twenty microseconds , total segments is equal to seven

i believe that the answer is c.