You boil an enzyme, combine it with a substrate and test for the enzyme activity in 20 min. After 20 minutes,  enzyme appears inactive. What is the most probable explanation for this result?

The table below reflects results of an experiment looking at enzymatic activity using iodine test:  Tubes Contents and conditions Color of the tube after 30 min incubation (with iodine added) Tube 1 5 drops starch + 5 drops amylase, room temperature Light brown/amber Tube 2 5 drops starch + 1 drop amylase, room temperature Dark brown Tube 3 5 drops starch + 1 drop amylase, 1 drop of HCl, room temperature Black/purple Tube 4 5 drops starch + 1 drop boiled amylase, room temperature Black/purple Which tube(s) would show a negative result (color change) for Benedict’s (sugar) test? Select all that apply.

Imagine your professor has a visual acuity of 20/40 in the left eye. The top number, “20” represents

What are the causes of muscle fatigue?

All cutaneous senses adapt rapidly.

Seeing occurs in the eye.

A single neuron synapsed to many muscle cells allows for precise movements.

Perception occurs in sensory receptors.

After an injury, some of the motor neurons to a muscle are dead.  The surviving motor neurons may form new branches that extend to more muscle cells.  What happened to muscle strength?

What choice best describes why a person with sensory hearing loss in the right ear would not be accurately locate sound?