Question

name:principles of biomedical scienceclass period:date:worksheet for 1.2.4 & gel electrophoresis1) convert the following between milliliters (ml) and microliters (μl). show your work47 ml = ____ μl309 μl = ____ ml2) based on the experiment we completed yesterday, what type of charge (negative or positive)does dna have? (recall that our samples started near the negative charge and moved towardthe positive charge).3) histology is the study of?a) microscopic anatomy of tissuesb) macroscopic anatomy of tissuesc) visual study of tissuesd) dna profiling of tissues4) a 94 - year - old man is found unresponsive at the bottom of a staircase. the autopsy reveals afractured skull and severe bleeding in the brain. toxicology reports show a high level ofalcohol in his system. the medical examiner concludes that the man fell down the stairs whileintoxicated.based on this scenario, identify the cause, mechanism, and manner of death:cause:mechanism:manner:

Explanation:

Step1: Convert milliliters to microliters

Since \(1\ \text{mL} = 1000\ \mu\text{L}\), for \(47\ \text{mL}\), we multiply by \(1000\).
\(47\times1000 = 47000\ \mu\text{L}\)

Step2: Convert microliters to milliliters

Since \(1\ \mu\text{L}=\frac{1}{1000}\ \text{mL}\), for \(309\ \mu\text{L}\), we divide by \(1000\).
\(309\div1000=0.309\ \text{mL}\)

Step3: Determine DNA charge

Opposite charges attract. DNA moved from negative to positive, so it has a negative charge.

Step4: Define histology

Histology is the study of the microscopic anatomy of tissues (a).

Step5: Identify cause, mechanism, and manner of death

• Cause: Head trauma (from fractured skull and brain bleeding)
• Mechanism: Skull fracture and brain bleeding (due to fall)
• Manner: Accident (fell while intoxicated)

Answer:

1. \(47\ \text{mL} = 47000\ \mu\text{L}\), \(309\ \mu\text{L}=0.309\ \text{mL}\)
2. Negative
3. a) Microscopic anatomy of tissues

4.

• Cause: Head trauma
• Mechanism: Skull fracture and brain bleeding
• Manner: Accident