Isomerization:The second step of glycolysis involves the conversion of glucose-6-phosphate to fructose-6-phosphate (F6P). This reaction occurs with the help of the enzyme phosphoglucose isomerase (PI). As the name of the enzyme suggests, this reaction involves an isomerization reaction.

Yeast mutant lacking phopshoglucose isomerase unable to performed this step and that's why it unable to grow in media containing glucose while in fructose break down this step is not required so it is able to grow in media containing fructose.

Deletion of phosphoglucose isomerase, prevents growth on glucose; therefore, phosphoglucose isomerase mutant is able to grown in a fructose medium.

4 0

4 years ago

Newton’s Laws

Katarina [22]

Answer:

Newton’s first law (i.e about inertia) is best shown in this example.

Explanation:

Newton's first law states that every object continues in its state either motion or rest until it is acted upon by any other external force.
As the student is in motion when he/ she hits the patch of ice. as no external force is applied, he/she continues the motion by sliding over the ice due to inertia.
Until the friction and other resistance force balances the motion he/she will not stop sliding.

5 0

4 years ago