Using Mice,a Biologist Studying the Cycle of Protein Interactions in Muscle

question 67

Multiple Choice

Using mice,a biologist studying the cycle of protein interactions in muscle contraction has induced a mutation in one of the genes encoding proteins involved in this cycle.She finds that the muscle fibers expressing this mutation are not able to contract.Upon further investigation,she finds that calcium release into the sarcoplasm is normal,and calcium binding to protein filaments is normal.Which hypothesis could explain this mutation?

• A) The mutation occurs at the site on actin where myosin binds.
• B) The mutation occurs in a region of tropomyosin that undergoes conformational change to expose the myosin-binding site on actin.
• C) The mutation occurs in the myosin tail region,preventing titin binding to myosin.
• D) The mutation occurs in myosin and prevents release of inorganic phosphate from the ATP binding site.
• E) All of the above

Understand the phases and processes involved in the cognitive-behavioral approach.

Identify and differentiate between dysfunctional schemas and how they relate to specific personality disorders.

Recognize the use and importance of functional analysis in cognitive-behavioral therapy.

Know key models and their developers within cognitive and behavioral therapies.

---

Definitions:

Contribution Margin

The difference between sales revenue and variable costs, indicating how much revenue is available to cover fixed costs and generate profit.

Variable Cost

Costs that change in proportion to the level of activity or volume of production, such as materials and labor.

Cost of Goods Sold

The total cost directly associated with producing the goods sold by a business during a specific period, including labor, materials, and manufacturing overhead.

Product Costs

The costs directly associated with producing goods, including direct materials, direct labor, and manufacturing overhead.