In bone-conduction testing, both cochleae are stimulated because:

Explain how speech audiometry can be used to estimate a patient’s communicative function in everyday listening environments.

Consider the experiment of taking this exam. Suppose we model your score for this exam as Y=5X, where X is a discrete uniform random variable over {0,1,…,N}, and N is the total number of questions. Note that X represents a random variable which is the total number of questions you get right. Find

Discuss the complete procedure for conducting air- and bone-conduction pure-tone audiometry, including patient instructions, clinician responsibilities, and methods for threshold determination. Make sure you add information on each of these aspects. 

You analyze the genome of an organism and measure the percentage of adenine (A) at 20%. What can you safely conclude about the percentages of the remaining nucleotides?

Pathogenic Streptococcus pneumoniae produce a polysaccharide capsule that helps them evade phagocytosis by host phagocytes, allowing them to multiply, resulting in pneumonia. S. pneumoniae that lack the capsule do not cause disease as they are readily destroyed by host phagocytes. When a mixture of living nonencapsulated and heat-killed encapsulated S. pneumoniae are injected into a mouse, the mouse dies, and living capsulated bacteria can subsequently be isolated from the mouse. Which of the following best explains this result?

Pure-tone audiometry measures hearing sensitivity across which range of frequencies?

Which speech-audiometric measure best estimates communicative function in noise?

Which term refers to the lowest intensity level at which speech can just be detected?  

Imagine you create an E. coli mutant in which you replace the lacY gene of the lac operon that codes for the lac permease with a green fluorescent protein (GFP) reporter gene. GFP fluoresces green upon exposure to UV light. You inoculate your mutant into a glucose salts broth with added lactose and measure its growth with a spectrophotometer, and you occasionally shine a low level (not harmful to growth) UV light on your culture. You would expect your culture to ______.