DNA
What is the shape of DNA?
double helix
What are the 4 blood components?
Red Blood Cells, White Blood Cells, Platelets, Plasma.
What profession analyses handwriting?
Graphologist
What is the first thing a first responding officer does when arriving at a crime scene?
Make sure that the victim is alive and that the medics are on their way.
What is another name for white blood cells?
Leukocytes.
What base does Adenine pair with (not abbreviated form)?
Thymine
What is an allele?
A specific form of gene/s.
What do you call a sample of the suspects writing?
Types of evidence:
Trace, physical, testimonial.
What three molecules are nucleotides made of?
Nitrogenous base, sugar molecule, phosphate group.
A code for making proteins.
How does a spine differ from a satellite spatter?
Spines are lines that circle around the parent drop. Satellite spatters are individual drops of blood that separate from the parent drop when it falls.
What are the forgery types?
Freehand simulation, tracing, disguised writing.
What is the spiral search method?
Search starts at an outer point and gradually moves toward the center.
What print is invisible and must be developed by physical or chemical means (results from deposits of perspiration or body oils)?
Latent Print.
How are polynucleotide chains joined together?
Hydrogen bonds (between the nitrogenous bases; 100 extra points).
When separating blood components in a centrifuge, which component out of the 4 goes to the bottom?
Red Blood Cells.
What are infrared spectroscopes?
They are tools used to determine if different ink types were used.
Can lead to accusations of negligence or of covering up evidence.
Which chemical reacts with amino acids (protein) left by the fingerprints to make orange to purple images?
Ninhydrin.
What do covalent bonds join?
Sugar and phosphate groups.
Is a drop of blood a transfer, projected or a passive bloodstain?
Passive
What do Biometric Signature Pads evaluate?
The speed pressure and rhythm os a person's signature to recognise forgeries.
What is the examine step of the crime scene protocol?
Identifying the point of entry and exit, and to outline the general layout of the crime scene. Identify any possible evidence.
What do presumptive blood tests do?
Establish the possibility that a specific bodily fluid is present.