"All genes are encoded by DNA and the DNA is present in the chromosomes in the cell nucleus and telomeres, they are the ends of the chromosomes and they have an important function to protect the chromosomes and maintain the integrity of the chromosomes."

VOA: special.2009.10.07

One of the most obvious things about a red blood cell is it doesn't have nucleus, it has no nucleus.

红细胞最为明显的不同就是,它是无核的,它没有细胞核

耶鲁公开课 - 生物医学工程探索课程节选

Many steroid hormones act because they bind to cellulars - to receptors that are deep within the cell, often inside the nucleus.

许多类固醇激素能够起效是因为,其与存在于细胞内部的受体相结合,这类受体通常在细胞核内

耶鲁公开课 - 生物医学工程探索课程节选

Vitamin D works inside the cell nucleus as a basic building block to help turn genes on or off.

FORBES: Magazine Article

It also cuts the lines of communication between any receptors which are still activated and the cell nucleus, so that the nucleus cannot take instructions from the hormone.

ECONOMIST: Treating prostate cancer

In reality, DNA is twisted and folded up inside the cell nucleus, with the result that bits of the molecule that seem far apart on a map are actually next to each other in the nucleus.

ECONOMIST: Genomics has not yet delivered the drugs, but it will