Answer:
One type of macromolecule: DNA (deoxyribonucleic acid)
The function of that macromolecule: it is the macromolecule that contains the genetic information of living organisms.
How it is related to forensic science (i.e. provide an example and explain its use in forensic science): DNA is used in forensic science for many applications, one of them is to identify a criminal form the samples of hair, saliva, blood etc. collected from a crime scene.
Step-by-step explanation:
A macromolecule is a large molecule that is made up of smaller subunits.
DNA is a macromolecule that is made up of nucleic acids.
DNA is most commonly used in forensic science as it is commonly present in the samples such as saliva, hair, blood, etc. that can be easily obtained from a crime scene.
This DNA can then be used to match the person with the help of DNA fingerprinting.
The advantage is that even a small amount of DNA in the samples can be utilized as the technique of polymerase chain reaction (PCR) exists.