All AQA exam QUESTIONS AND
VERIFED CRRECT ANSWERS GRADED
A+ LATEST 2026-2027 100%
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Which test could the scientists have used to identify that there are amino acids in white wine? -
CORRECT ANSWER-Biuret
Name the chemical element found in all amino acids that is not found in triglycerides (1) -
CORRECT ANSWER-Nitrogen
The scientists used a statistical test to determine whether there was a significant difference in
the amino acid concentration in the two types of white wine. They obtained a value for P of
0.04.
Name the statistical test the scientists used and give a reason for your answer. Was the
difference significant? Give a reason for your answer. (3) - CORRECT ANSWER-T-test
Because looking for differences between two means
Difference is significant/not due to chance if P value is less than 0.05
Explain how the chromosome number is halved during meiosis (2) - CORRECT ANSWER-One of
each homologous chromosome pair goes to opposite poles
Describe the process of crossing over and explain how it increases genetic diversity (4) -
CORRECT ANSWER-Homologous chromosomes pairs of chromosomes associate
, Chiasma forms
Alleles exchanged
Producing new combination of alleles
Describe how you would use cell fractionation techniques to obtain a sample of chloroplasts
from leaf tissue (3) - CORRECT ANSWER-Homogenise to break open cells
Centrifuge
at increasing speeds until chloroplasts are obtained
What is the function of the mitochondria? (1) - CORRECT ANSWER-Site of aerobic respiration to
produce ATP
Give three properties of water that are important in biology (3) - CORRECT ANSWER-It is a
metabolite
Has hight heat capacity
Has large latent heat of vaporisation
The student produced the sucrose solutions with different concentrations from a concentrated
sucrose solution.
Name the method she would have used to produce these sucrose solutions (1) - CORRECT
ANSWER-Dilution series
Explain the result for the potato in 0.8 mol dm−3 sucrose solution (increases in mass) (2) -
CORRECT ANSWER-Solution has lower water potential than potato
So water moves out of potato into solution by osmosis
Define species (1) - CORRECT ANSWER-Group of organisms that can interbreed and produce
fertile offspring
VERIFED CRRECT ANSWERS GRADED
A+ LATEST 2026-2027 100%
GUARANTEED PASS
Which test could the scientists have used to identify that there are amino acids in white wine? -
CORRECT ANSWER-Biuret
Name the chemical element found in all amino acids that is not found in triglycerides (1) -
CORRECT ANSWER-Nitrogen
The scientists used a statistical test to determine whether there was a significant difference in
the amino acid concentration in the two types of white wine. They obtained a value for P of
0.04.
Name the statistical test the scientists used and give a reason for your answer. Was the
difference significant? Give a reason for your answer. (3) - CORRECT ANSWER-T-test
Because looking for differences between two means
Difference is significant/not due to chance if P value is less than 0.05
Explain how the chromosome number is halved during meiosis (2) - CORRECT ANSWER-One of
each homologous chromosome pair goes to opposite poles
Describe the process of crossing over and explain how it increases genetic diversity (4) -
CORRECT ANSWER-Homologous chromosomes pairs of chromosomes associate
, Chiasma forms
Alleles exchanged
Producing new combination of alleles
Describe how you would use cell fractionation techniques to obtain a sample of chloroplasts
from leaf tissue (3) - CORRECT ANSWER-Homogenise to break open cells
Centrifuge
at increasing speeds until chloroplasts are obtained
What is the function of the mitochondria? (1) - CORRECT ANSWER-Site of aerobic respiration to
produce ATP
Give three properties of water that are important in biology (3) - CORRECT ANSWER-It is a
metabolite
Has hight heat capacity
Has large latent heat of vaporisation
The student produced the sucrose solutions with different concentrations from a concentrated
sucrose solution.
Name the method she would have used to produce these sucrose solutions (1) - CORRECT
ANSWER-Dilution series
Explain the result for the potato in 0.8 mol dm−3 sucrose solution (increases in mass) (2) -
CORRECT ANSWER-Solution has lower water potential than potato
So water moves out of potato into solution by osmosis
Define species (1) - CORRECT ANSWER-Group of organisms that can interbreed and produce
fertile offspring
