DNA, Forensics, and Biological Functions

This video tutorial reviews key concepts from Unit 1.1 of Principles of Biomedical Science. It covers personal protective equipment (PPE), forensic science basics, designing experiments, crime scene search methods, and evidence analysis, including hair, fingerprints, and blood typing. The tutorial also explains DNA structure, protein synthesis, and DNA fingerprinting, providing a comprehensive overview of the unit's topics.

What is the primary purpose of Personal Protective Equipment (PPE)?

• To improve communication in noisy environments

• To increase productivity by reducing breaks

• To enhance comfort in the workplace

• To protect individuals from environmental hazards and prevent contamination

In forensic science, what is the main goal when investigating a crime scene?

• To entertain the public

• To reconstruct past events using scientific methods

• To create fictional stories

• To predict future crimes

Which of the following is NOT a method used for searching a crime scene?

• Grid search

• Random search

• Zone search

• Line strip search

What is the outermost layer of a hair strand called?

• Cortex

• Cuticle

• Follicle

• Medulla

What is the primary function of red blood cells?

• To fight infections

• To carry oxygen and carbon dioxide

• To clot blood

• To produce antibodies

Which blood type has the most antigens?

• O negative

• A positive

• B negative

• AB positive

What are the building blocks of DNA and RNA called?

• Lipids

• Nucleotides

• Amino acids

• Proteins

In the process of protein synthesis, what is the role of mRNA?

• To serve as a template for protein assembly

• To transport amino acids

• To replicate DNA

• To break down proteins

What is the purpose of gel electrophoresis in DNA fingerprinting?

• To synthesize new DNA

• To separate DNA fragments by size

• To amplify DNA

• To sequence DNA

Which of the following is a correct base pairing in DNA?

• Guanine with Thymine

• Adenine with Cytosine

• Cytosine with Thymine

• Adenine with Thymine