While Observing a Special Monitor, a Physician Tells an Expectant

question 142

Multiple Choice

While observing a special monitor, a physician tells an expectant mother, "As you can see, the legs and arms have just begun to emerge." From this description, you should realize that the two are looking at a(n)

• A) zygote.
• B) fetus.
• C) embryo.
• D) germ disc.

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Definitions:

Guanine Cap

A modified form of guanine nucleotide added to the 5' end of eukaryotic mRNA, playing a critical role in RNA stability and the initiation of translation.

Posttranscriptional Control

The regulation of gene expression at the RNA level, after the process of transcription, affecting mRNA splicing, transportation, stability, and translation efficiency.

Tumor-suppressor Genes

Genes that help regulate cell growth and division, and can prevent the development of tumors by inhibiting cell proliferation.

Anti-oncogenes

Anti-oncogenes, also known as tumor suppressor genes, are genes that help regulate cell growth and division, preventing the uncontrolled cell growth that contributes to cancer formation.