In an Organism Such as a Sea Urchin, Administration of Actinomycin

question 22

Multiple Choice

In an organism such as a sea urchin, administration of actinomycin D prevents all mRNA synthesis. However, early development up to gastrula formation can take place in the presence of actinomycin D but gastrulation cannot. This implies that _________.

• A) actinomycin D is part of the normal environment of a sea urchin and serves as a developmental signal molecule
• B) maternal effect genes regulate development until gastrulation
• C) mRNA synthesis is not required after gastrulation
• D) development beyond gastrulation requires actinomycin D
• E) immature sea urchin embryos produce actinomycin D to regulate further development

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Definitions:

Direct Labor-Hours

A measure of the total hours worked directly on the production of goods.

Budget Variances

The difference between budgeted and actual figures for revenues or expenditures, indicating under or overspending.

Underapplied

A situation where the allocated manufacturing overhead costs are less than the actual overhead costs incurred, leading to underestimation of product costs.

Overapplied

A condition where the allocated amount of indirect costs exceeds the actual amount incurred.