When Expression of _______ Is Turned Off in Small Pre-B

question 31

Multiple Choice

When expression of _______ is turned off in small pre-B cells,the result is the presence of P nucleotides but an absence of N nucleotides in around 50% of light-chain genes.

• A)Kit
• B)CD19
• C)TdT
• D)Pax-5
• E)RAG-1 and RAG-2.

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Definitions:

Isoprene Unit

A five-carbon hydrocarbon unit, C5H8, that is the basic building block of natural rubber and other terpenes.

Pseudomonas Aeruginosa

A species of gram-negative, aerobic, rod-shaped bacteria associated with opportunistic infections, notably resistant to antibiotics and capable of biofilm formation.

Liverwort

A type of small, non-vascular plant from the Marchantiophyta class, often found in moist habitats.

Isoprene Rule

A rule stating that terpenes are assembled from isoprene units, reflected in their structure.