Statement of problem:………………. Hypothesis: unripen papaws are likely to become ripe faster when surrounded by ripe mangoes due to the secretion of a natural fruit ripening hormone from the ripe mangoes. Aim: to determine if unripe papaws will ripen faster around ripe mangoes Materials:
! unripe bananas " ripe mangoes ! #allo #allon n $ip $ip lock lock bags bags big big enoug enough h to hold hold both both the the papaw papaw and Sharp knife Sharp knife %utting board Petri dish &odine solution marker
Method '( Place a banana banana into into each of the $ip $ip lock lock bags. bags. "( Place one mango mango each into two of of the bags bags and $ip $ip them all all closed) ensure ensure it it is properly sealed. *( +abel the bags bags A, A, using using the marker marker !( +ea-e the ! bags containing containing fruits fruits for ! days at room temperature temperature ( Monitor the fruits once once daily after after the /rst /rst day) obser-e obser-e for any any colour change in the banana and 0ecord obser-ations 1( 0epeat step ! for another another " days 2( 3n the fourth day prepare prepare for the testing of starch starch in the fruit fruit /rstly by pouring cm* of iodine solution into the petri dish 4( %ut a cross cross section section of one of the bananas bananas taking into consideration consideration the the letter on the bag which the banana came from. 5( Place the half half section of the banana banana cut side down into the iodine iodine solution solution in the petri dish and lea-e for one minute. '6(( '6 0emoemo-e e the the bana banana na from from the the sol solut utio ion n and and rins rinse e the the face face wher where e it it is is stained with water ' '( 0epeat steps 4'6 fo for the other bananas '"(( '" 3bse 3bserr-e e and and recor ecord d the the le-e le-ell of of col colou ourr sta stain in by char charac acte teri ring ng them them according to either highly stained) lightly stained or unstained. 7ariables %ontrolled %ontrolled statement
%oncentration of ethylene in the bags by keeping the $ip lock bags completely sealed &ndependent 7ariable the bags with. 8he ripenfruit ,ependent. 7ariable the unripen fruit .
0esults to be collected from the testing for starch in the four bananas &nterpretation of results &odine solution is use as an indicator used to point out the presence of starch) the iodine solution binds with starch molecules producing a starchecting the rate of ripening
Precaution ,o not rinse the banana sample to -igoursly this can method can rinse the iodine
