Use the Following to Answer Questions

question 48

Multiple Choice

Use the following to answer questions
In the nematode worm C. elegans loss-of-function ced-3 mutations lead to more cells than normal due to a defect in apoptosis. Loss-of-function mutations in ced-9 cause embryonic lethality due to ectopic cell deaths. The phenotype of ced-9; ced-3 double mutants is the same as ced-3 single mutants; that is, there are more cells than normal due to a defect in apoptosis. Genes ced-3 and ced-9 are known to act in the same genetic pathway.
-Which of the following statements might be TRUE about the genes ced-3 and ced-9? (Select all that apply.)

• A) ced-3 encodes a caspase.
• B) ced-9 encodes a caspase.
• C) ced-9 encodes a functional homolog of the Drosophila gene reaper.
• D) ced-3 stimulates phagocytosis of a cell in which it is expressed.
• E) ced-9 activity leads to DNA degradation.

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Definitions:

Total Annual Fixed Costs

The sum of all consistent, non-variable expenses that a company incurs over the course of a year.

Demand Curve

A graph showing the relationship between the price of a good or service and the quantity demanded by consumers, typically sloping downward from left to right.

Sales Price

The amount of money for which a product or service is sold to the customer.

Quantity Sold

The total number of units of a product or service sold during a specific period.