Cultures of Two Different Cell Types Are Exposed to the Same

question 45

Multiple Choice

Cultures of two different cell types are exposed to the same signaling ligand.Analysis of gene expression shows that only one of the cell types responded to the ligand.Which of the following may account for this difference?

• A) The ligand was only bioavailable to one of the cell types.
• B) Only one of the cell types contained accessible target gene DNA sequences.
• C) Only one cell type contained DNA.
• D) The ligand could only pass through the membrane of one of the cell types.

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Definitions:

Kruskal-Wallis Test

A non-parametric statistical test used to compare three or more independent samples to determine if they come from the same distribution.

Wilcoxon Tests

A nonparametric statistical test used to compare two paired groups to assess whether their population mean ranks differ.

Assembly Time

The duration required to assemble a product or system from its components.

Blocked Experiment

An experimental design in which units are grouped (blocked) based on similar attributes before randomly assigning treatments within blocks to reduce variability and improve accuracy.