BIOLOGY PEARSON EDEXEL IGCSE
UPDATED EXAM 2025 COMPLETE
MULTIPLE CHOICE QUESTION BANK
WITH VERIFIED ANSWERS,DETAILED
EXPLANATIONS AND 100% PASS
GUARANTEE AND GRADED A+ (LATEST
EDITION!!!!!!)
Describe how a plasmid is modified to contain recombinant
DNA. (4 marks) - THE CORRECT ANSWER-- restriction enzymes cut (1)
- plasmid and target gene/gene for desired characteristic (1)
- ligase enzymes join (1)
- complementary shapes/sticky ends (1)
GM plants vs pesticides! (6 marks---points you don't know yet)
- THE CORRECT ANSWER-- pesticides can lead to health problems (1)
- GM plants reduce the need for pesticides (1)
- GM plants could result in cross-pollination of other species (1)
- insects may develop resistance to poison produced by GM
crops (1)
- customers may not buy GM crops (1)
- patent means farmers become dependent on companies for
their seeds (1)
,Explain why the coloured water drop moves during an
investigation into aerobic respiration in an insect. (4 marks) -
THE CORRECT ANSWER-- moves left (1)
- CO2 produced by insect absorbed by filter paper (1)
- oxygen (used by insect) (1)
- in respiration (1)
Name 5 factors apart from age, sex and species of the insect
you're measuring for aerobic respiration that could affect the
results. (5 marks) - THE CORRECT ANSWER-- mass (1)
- size of flask (1)
- size of filter paper (1)
- temperature (1)
- duration (1)
Name the carbohydrate added to milk to make yogurt (1 mark) -
THE CORRECT ANSWER-- lactose (1)
Cell division can cause variation in offspring. Name 4 other
factors that cause variation in offspring. - THE CORRECT ANSWER--
random mating (1)
- random fertilisation (1)
- environment (1)
- mutation (1)
Scientists investigating a drug treatment use rats that are
homozygous for many genes. Suggest the advantages of using
, rats that are homozygous for many genes. (2 marks) - THE
CORRECT ANSWER-- little/no genetic variation (1)
- respond to drugs in same way (1)
when comparing two things... - THE CORRECT ANSWER-use fewer/less
(1)
describe a method a farmer could use to reduce the number of
insects on his/her crop without using GM plants or insecticides.
(4 marks) - THE CORRECT ANSWER-- _biological control_ (1)
- introduce predator (1)
- to eat greenflies (1)
when investigating the difference between inhaled and exhaled
air, the exhaled air goes into which tube? And why? (3) - THE
CORRECT ANSWER-the right one
- mouthpiece connects to long tube in right flask (1)
- tube in liquid in right flask causes bubbles in limewater---only
draws air in left flask (1)
- cannot inhale in right flask as you would get a mouthful of
liquid (1)
magnification = - THE CORRECT ANSWER-length of diagram/length of
real thing
what are the effects of fewer red blood cells? (4) - THE CORRECT
ANSWER-- less haemoglobin (1)
- less oxygen transport (1)
UPDATED EXAM 2025 COMPLETE
MULTIPLE CHOICE QUESTION BANK
WITH VERIFIED ANSWERS,DETAILED
EXPLANATIONS AND 100% PASS
GUARANTEE AND GRADED A+ (LATEST
EDITION!!!!!!)
Describe how a plasmid is modified to contain recombinant
DNA. (4 marks) - THE CORRECT ANSWER-- restriction enzymes cut (1)
- plasmid and target gene/gene for desired characteristic (1)
- ligase enzymes join (1)
- complementary shapes/sticky ends (1)
GM plants vs pesticides! (6 marks---points you don't know yet)
- THE CORRECT ANSWER-- pesticides can lead to health problems (1)
- GM plants reduce the need for pesticides (1)
- GM plants could result in cross-pollination of other species (1)
- insects may develop resistance to poison produced by GM
crops (1)
- customers may not buy GM crops (1)
- patent means farmers become dependent on companies for
their seeds (1)
,Explain why the coloured water drop moves during an
investigation into aerobic respiration in an insect. (4 marks) -
THE CORRECT ANSWER-- moves left (1)
- CO2 produced by insect absorbed by filter paper (1)
- oxygen (used by insect) (1)
- in respiration (1)
Name 5 factors apart from age, sex and species of the insect
you're measuring for aerobic respiration that could affect the
results. (5 marks) - THE CORRECT ANSWER-- mass (1)
- size of flask (1)
- size of filter paper (1)
- temperature (1)
- duration (1)
Name the carbohydrate added to milk to make yogurt (1 mark) -
THE CORRECT ANSWER-- lactose (1)
Cell division can cause variation in offspring. Name 4 other
factors that cause variation in offspring. - THE CORRECT ANSWER--
random mating (1)
- random fertilisation (1)
- environment (1)
- mutation (1)
Scientists investigating a drug treatment use rats that are
homozygous for many genes. Suggest the advantages of using
, rats that are homozygous for many genes. (2 marks) - THE
CORRECT ANSWER-- little/no genetic variation (1)
- respond to drugs in same way (1)
when comparing two things... - THE CORRECT ANSWER-use fewer/less
(1)
describe a method a farmer could use to reduce the number of
insects on his/her crop without using GM plants or insecticides.
(4 marks) - THE CORRECT ANSWER-- _biological control_ (1)
- introduce predator (1)
- to eat greenflies (1)
when investigating the difference between inhaled and exhaled
air, the exhaled air goes into which tube? And why? (3) - THE
CORRECT ANSWER-the right one
- mouthpiece connects to long tube in right flask (1)
- tube in liquid in right flask causes bubbles in limewater---only
draws air in left flask (1)
- cannot inhale in right flask as you would get a mouthful of
liquid (1)
magnification = - THE CORRECT ANSWER-length of diagram/length of
real thing
what are the effects of fewer red blood cells? (4) - THE CORRECT
ANSWER-- less haemoglobin (1)
- less oxygen transport (1)
