What Are the Mechanisms by Which Bacteria Preferentially Take Up

question 19

Multiple Choice

What are the mechanisms by which bacteria preferentially take up DNA from individuals of the same species? Check all that apply.

• A) A specific sequence in the species DNA allows for uptake of DNA fragments that carry that sequence.
• B) Proteins that are secreted by the bacteria must reach a threshold level that is correlated to the number of individuals of the same species being present.
• C) Some species require a specific calcium level for uptake and the levels of calcium are correlated with the number of bacteria in localized area.

---

Definitions:

Sectional Views

Drawings that show the interior of an object or structure through a hypothetical cutting plane, revealing internal features.

Counterbore

A cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create such a hole, often to hide the head of a bolt or screw.

Level Seating Surface

A flat or contoured surface designed to support a component securely and evenly, ensuring proper alignment and function.

Fastener

A hardware device that mechanically joins or affixes two or more objects together.