AQA A-LEVEL BIOLOGY BIOLOGICAL MOLECULES Questions
With Accurate Answers
Hydrogen peroxide changes the shape of antitrypsin by breaking up the disulphide bonds in antitrypsin.
Thus, no longer attaches to trypsin. - Accurate answers Alpha-1-antitrypsin is a protein that
reduces the activity of the enzymes that can damage lung tissue. cigarette smoke contains hydrogen
peroxide. hydrogen peroxide reduces the activity of alpha-1-antitrypsin. Scientists investigated the
effect of different concentrations of hydrogen peroxide on the activity of alpha-1-antitrypsin. The graph
shows their results.
HYDROGEN PEROXIDE REACTS WITH TWO-AMINO ACIDS IN ALPHA-1-ANTITRYPSIN. EXPLAIN HOW THIS
REDUCES ACTIVITY OF THE PROTEIN.
The higher the concentration of the hydrogen peroxide, the more amino acids are affected. More
antitrypsin molecules change shape. - Accurate answers Explain the results shown in the graph.
Long-term smokers inhale a lot of hydrogen peroxide, smokers have a lot of enzyme activity that
damages lung tissue.
Thus, reducing gas exchange surface. - Accurate answers Long-term smokers are often short of
breath. Use this information to explain why.
Condensation reaction. - Accurate answers Name the chemical process which is involved in the
formation of "sucrose".
Glycosidic bond - Accurate answers Give the name of the bond which is formed when two
monossacharides together to form a disacharide.
Maltose - Accurate answers Glucose alpha + Glucose beta?
Sucrose - Accurate answers Glucose + Fructose?
Lactose - Accurate answers Glucose + Galactose?
With Accurate Answers
Hydrogen peroxide changes the shape of antitrypsin by breaking up the disulphide bonds in antitrypsin.
Thus, no longer attaches to trypsin. - Accurate answers Alpha-1-antitrypsin is a protein that
reduces the activity of the enzymes that can damage lung tissue. cigarette smoke contains hydrogen
peroxide. hydrogen peroxide reduces the activity of alpha-1-antitrypsin. Scientists investigated the
effect of different concentrations of hydrogen peroxide on the activity of alpha-1-antitrypsin. The graph
shows their results.
HYDROGEN PEROXIDE REACTS WITH TWO-AMINO ACIDS IN ALPHA-1-ANTITRYPSIN. EXPLAIN HOW THIS
REDUCES ACTIVITY OF THE PROTEIN.
The higher the concentration of the hydrogen peroxide, the more amino acids are affected. More
antitrypsin molecules change shape. - Accurate answers Explain the results shown in the graph.
Long-term smokers inhale a lot of hydrogen peroxide, smokers have a lot of enzyme activity that
damages lung tissue.
Thus, reducing gas exchange surface. - Accurate answers Long-term smokers are often short of
breath. Use this information to explain why.
Condensation reaction. - Accurate answers Name the chemical process which is involved in the
formation of "sucrose".
Glycosidic bond - Accurate answers Give the name of the bond which is formed when two
monossacharides together to form a disacharide.
Maltose - Accurate answers Glucose alpha + Glucose beta?
Sucrose - Accurate answers Glucose + Fructose?
Lactose - Accurate answers Glucose + Galactose?
