Course name: Key Stage 3 Science Student Book 3
Homework quiz
1.
Which of these statements about how we use DNA is incorrect? [1 marks]
Choice 1)
It can be used to genetically alter organisms so that they can make human growth hormone
Choice 2)
It can be used to prove that people are innocent of a crime that they are suspected of committing
Choice 3)
It can be used to predict the onset of contagious childhood diseases such as measles
Choice 4)
It can be used to prove that people are guilty of a crime that they are suspected of committing
2.
How is DNA testing used in the food industry? [1 marks]
Choice 1)
To ensure that a product is made from what the industry says it is made from
Choice 2)
To make sure it tastes good
Choice 3)
To make sure that it can be digested
Choice 4)
To make sure that it is good quality and not infected
3.
Match the stage of DNA extraction to its purpose. [1 marks]
Spun at high speed
To release cell contents
Cells broken down by grinding
To break down fat and protein
Ethanol added
To solidify the DNA
Salt solution and cleaning agent added
To collect the solid DNA
4.
Match the sentences about DNA profiling to the missing words. [1 marks]
An advantage of a DNA ______ is that it can be used to help convict people who have committed crimes
profiles
DNA ______ are stored on a database
database
An advantage of DNA profiling is that it can help predict ______ conditions in children
predict
A disadvantage of a DNA database is that it could be used by insurance companies to ______ people at risk
medical
from life threatening illnesses
5.
Why is DNA extracted from cells? Choose two answers. [1 marks]
Choice 1)
To make carbohydrates
Choice 2)
To detect genetic disorders
Choice 3)
To solve crimes
Choice 4)
To prevent a person from becoming ill
6.
What happens to animal and plant DNA that you eat in your food? Choose two answers. [1 marks]
Choice 1)
It combines with your DNA
Choice 2)
It is added to your DNA
Choice 3)
It is broken down by enzymes
Choice 4)
It passes out in your faeces