Many So-Called Temperature-Sensitive Mutations Have Been Discovered in a Wide

question 26

Essay

Many so-called temperature-sensitive mutations have been discovered in a wide variety of organisms.These are proteins that are non-functional at higher temperatures,while,at lower temperatures (often just a few degrees lower),they function normally.For example,the coloration patterns in Siamese Cats arise from a temperature-sensitive mutation.An enzyme required for the synthesis of dark pigment is unable to function in areas close to the body where normal physiological temperatures prevail.However,at the tips of the ears,paws,the tip of the tail and other extremities where the temperature is slightly lower,the enzyme works correctly and dark pigment is produced.What is happening at the molecular level that explains this?

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Definitions:

Activity-Based Costing

A method of costing that identifies activities in an organization and assigns the cost of each activity to all products and services according to the actual consumption.

Batch Setup

Batch setup refers to the process and the activities involved in preparing equipment or a production area for manufacturing a specific batch of products.

Activity Rate

The cost driver rate used in activity-based costing to allocate costs to products or services based on their consumption of activities.

Activity-Based Costing

A costing method that assigns overhead and indirect costs to specific activities related to the production of goods or services.