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WorksheetsIGCSE Biology Review ?s (Extended) s.22/43
Total questions: 10
Worksheet time: 18mins
You are testing for an unknown substance. You use iodine and it turns black. What does the substance contain?
starch
reducing sugar
protein
lipids
What are two materials needed to be added to a fermenter to produce penicillin?
protein and fat
glucose and protein
amino acid and fat
glucose and ions (salts)
Why does the fermenter have a gas outflow pipe? (gas out)
add nutrients and water
mix the gas with the nutrients
release gas and prevent fermenter exploding
prevent contamination and mix nutrients with solution
State the role of haemoglobin.
The allele for the normal form of haemoglobin is HbA.
The allele for abnormal form of haemoglobin is HbS.
Both parents are heterozygous.
What are the parents phenotypes?
The allele for the normal form of haemoglobin is HbA.
The allele for abnormal form of haemoglobin is HbS.
Both parents are heterozygous.
What are the parents genotypes?
The allele for the normal form of haemoglobin is HbA.
The allele for abnormal form of haemoglobin is HbS.
Both parents are heterozygous.
What are the offsprings genotypes?
Describe how acid rain destroys forests.
Describe the structure of th villus and its role in the alimentary canal
Using the information, state the optimum length of time for efficient extraction of juices.
45-90 min
40-90 min
45 min
90 min
