biology 5090
BIOLOGY PAPER 6 QUESTIONS: miss mariam
1. You are given milk and natural live yoghurt. Describe an experiment you could carry out to show that the bacteria in the natural yoghurt must be alive for milk to be turned into more yoghurt. (10)
2. In an experiment, a student cuts a thin slice of banana and placed it onto a white tile with the freshly cut surface facing upwards.
she covered the surface with iodine solution and left it for five minutes.
after five minutes she picked up the slice of banana using forceps and rinsed off the extra iodine solution using water. she observed that some of the inner parts of banana were stained black.
a. state what conclusion she could make from her observations (2)
b. suggest why the student rinsed off the excess iodine solution before observing the banana slice (1)
c. suggest why she used forceps to hold the banana (1)
d. describe how would you test the inner part of another banana slice to see if it contains reducing sugars (3)
e. state the result of the test if reducing sugars are present (1)
1. You are given milk and natural live yoghurt. Describe an experiment you could carry out to show that the bacteria in the natural yoghurt must be alive for milk to be turned into more yoghurt. (10)
2. In an experiment, a student cuts a thin slice of banana and placed it onto a white tile with the freshly cut surface facing upwards.
she covered the surface with iodine solution and left it for five minutes.
after five minutes she picked up the slice of banana using forceps and rinsed off the extra iodine solution using water. she observed that some of the inner parts of banana were stained black.
a. state what conclusion she could make from her observations (2)
b. suggest why the student rinsed off the excess iodine solution before observing the banana slice (1)
c. suggest why she used forceps to hold the banana (1)
d. describe how would you test the inner part of another banana slice to see if it contains reducing sugars (3)
e. state the result of the test if reducing sugars are present (1)
Comments
Post a Comment