Due to Their High Transcription Rate, Active Ribosomal RNA (RRNA)

question 36

Multiple Choice

Due to their high transcription rate, active ribosomal RNA (rRNA) genes can be easily distinguished in electron micrographs of chromatin spreads. They have a characteristic "Christmas tree" appearance, where the DNA template is the "trunk" of the tree and the nascent RNA transcripts form closely packed "branches." At the base of each branch is an RNA polymerase extending that branch, while RNA processing complexes at the tip of the branch form terminal "ornaments." The top of the tree represents the ... of the rRNA gene, and the "ornaments" are at the ... end of the nascent rRNA molecules.

• A) end; 3'
• B) end; 5'
• C) beginning; either 3' or 5'
• D) beginning; 3'
• E) beginning; 5'

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Definitions:

Red Bone Marrow

A tissue found within bones that produces new blood cells, including red blood cells, white blood cells, and platelets.

Adult Skeleton

The complete framework of bones in an adult human, typically consisting of 206 bones, providing support and protection for the body's organs.

Epiphyseal Plates

Growth plates located at the ends of long bones, where new bone tissue is generated during childhood and adolescence to enable growth in length.

Mature Adult

An individual in the later stage of adulthood who has reached full physical and psychological development.