CGIs a 30-Year-Old Retired Stockbroker Who Has Developed Possible Skin

question 7

Multiple Choice

C.G.is a 30-year-old retired stockbroker who has developed possible skin cancer while sailing in Polynesia.A skin biopsy is analyzed for cyclin-dependent kinase activity at different concentrations of the cosubstrate adenosine triphosphate (ATP) .The results are shown in Figure 4.7. The apparent effect of the drug on C.G.'s kinase activity is to:

• A)Reduce the Vmax of the enzyme.
• B)Increase the Vmax of the enzyme.
• C)Reduce the Km of the enzyme.
• D)Increase the Km of the enzyme.
• E)Allosterically activate the kinase.

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Definitions:

Vestibular Senses

The sensations generated by receptors in the semicircular canals of the inner ear that inform us about the head’s orientation and movements.

Olfaction

The sense of smell, which is the ability to detect and interpret airborne molecules.

Vestibular Receptors

Sensors located in the inner ear that provide the brain with information about motion, head position, and spatial orientation; critical for maintaining balance.

Inner Ear

The deepest part of the ear, containing the cochlea and vestibular system, responsible for hearing and balance.