In Escherichia Coli, Replication of DNA Can Occur Throughout the Cell

question 19

Short Answer

In Escherichia coli, replication of DNA can occur throughout the cell cycle while the cell is also actively transcribing its genes. This means collisions between replication forks and RNA polymerases are inevitable. Depending on the orientation of the genes, collisions can be rear-end (when both machines are traveling in the same direction) or head-on (when they are traveling in opposite directions). In the following paragraph, match each of the letters (A to D) to one appropriate number below. Do not use a number more than once. Your answer would be a four-digit number composed of digits 1 to 5 only, e.g. 1253.
"Typically, in a rear-end collision, the (A) of RNA polymerase collides with the (B) in the replication fork. In contrast, in a head-on collision, the (C) of RNA polymerase hits the (D) in the fork."
1. front edge (of RNA polymerase)
2. rear edge (of RNA polymerase)
3. DNA helicase
4. leading-strand DNA polymerase
5. lagging-strand DNA polymerase

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Definitions:

Occipital lobe

The rearmost lobe in each cerebral hemisphere of the brain, primarily responsible for processing visual information.

Visual stimuli

Objects or aspects within the environment that are perceived visually and can influence behavior and cognitive processes.

Brain

The organ located in the skull responsible for central nervous system functions, including thought, memory, and regulation of the body.

Parietal lobe

A region of the cerebral cortex, located at the upper back area of the skull, involved in processing sensory information and spatial orientation.