Question

In the test tube a&b shown below, yeast was kept in sugar solution which products of respiration . would you expect in tubes a & b?

Answer 1

In the tube containing sugar solution and yeast, aerobic respiration will take place. So the products would be carbon dioxide and water.
The tube which has a oil cover on the sugar solution, doesn't have access to oxygen. So anaerobic respiration will take place. The respiration products will be carbon dioxide, lactic acid or ethanol.

Answer 2

Answer:

A - CO2 + ENERGY + LACTIC ACID

B - CO2 + ENERGY + WATER

Explanation:

the tube that has sugar solution, yeast and a layer of oil ( A )....ANAEROBIC RESPIRATION WILL TAKE PLACE.

WHY?

We know that anaerobic respiration takes place in the absence of oxygen.....the oil layer closes the tube, not letting any oxygen pass through it....hence there is no oxygen for aerobic respiration, so anaerobic will take place....

this is what happens in the tube

(glucose) in the absence of oxygen = co2 + lactic acid + energy

THIS IS A FAST PROCESS

The tube having sugar solution and yeast, AEROBIC RESPIRATION TAKES PLACE

WHY

Aerobic respiration takes place when there is oxygen present.......

there is nothing here to stop the air from entering the tube like the tube with oil.......

THIS IS WHAT HAPPENS

(glucose) in the presence of oxygen = WATER + CO2 + ENERGY

THIS IS A SLOW PROCESS