You receive some skeletonized human remains in your lab. The individual has several broken bones. The fractures have sharp edges, angled ends and hinging. You conclude the person received these injuries:

Fractures are defined as the dislocation or breaking of bones due to an injury or an accident. The fractures can be partial, closed, stable, or open.

The correct answer is:

While they were alive

The fractures having sharp edges, angled ends, and hinging can be caused when the person was alive.  

Perimortem fractures are those fractures that do not show any healing of fracture.

In the skeletonized remains of the human, the fractures have sharp edges, angled ends, and hinging.

The human remains do not show any healing, and therefore, were dead due to this injury or trauma.

The correct answer is while they were alive.

To know more about fractures, refer to the following link:

link

These injuries occur from a big accident.

Explanation:

I conclude that the person received these injuries from a big accident because the individual has many broken bones and this will happen only when a person experience a big accident such as hit by the truck or car etc. It is also possible that the person was killed by someone and before killing he beat the individual very badly as a result its bones were broken.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the correct answer is b