The shape of a bacterium is governed by its rigid cell wall.

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#Unit 6. System Physiology – Plant

Mitochondria is an respirosome, so it can avail oxygen out of complex IV and the oxygen used in the ETS without complex IV, always get converted into ROS.

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#Unit 5. Developmental Biology

The boundaries of the acron and telson are defined by the product of the torso gene, which is activated at the

tips of the embryo.

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#Unit 3. Fundamental Processes

The DNA of the inactive X also becomes methylated at most of its CpG island promoters. Specialized histone octamers in which histone H2A is replaced by a paralog of H2A called macroH2A also become associated with the inactive X.

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#Unit 3. Fundamental Processes

This is equivalent to nick translation, except that the new DNA replaces a stretch of RNA rather than a segment of DNA.

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#Unit 2. Cellular Organization

H3.3 is often referred to as a “replacement” histone.