Paramecia contain two types of nuclei: a large macronucleus and as many as 80 micronuclei. The micronuclei are typical eukaryotic nuclei, essential for genetic recombination. The macronucleus
A) is important in sexual recombination (conjugation).
B) contains several micronuclei.
C) contains many copies of the genetic information.
D) contains DNA that is not transcribed.
E) contains DNA that is transcribed but not translated.

Question

Quizplus · Accepted Answer

The macronucleus contains many copies of the genetic information, which allows for high levels of gene expression and enables the paramecium to carry out its metabolic and physiological functions. The DNA in the macronucleus is transcriptionally active, but it undergoes extensive rearrangement and amplification during development and is not directly involved in genetic recombination.

Paramecia Contain Two Types of Nuclei: a Large Macronucleus and as Many