Biol2300+week1+lecture

Front

Which type of chromatin would you expect to find predominantly in cells with actively transcribed genes and cells with mostly silent genes?

Back

The actively transcribed cell would contain mostly euchromatin, while the silent cell would contain mostly heterochromatin.

Front

What is the most fundamental level of DNA packaging involving DNA and histone proteins?

Back

Nucleosome

Front

What is the primary function of centromeres in DNA packaging?

Back

Serving as the point of attachment for spindle fibers during cell division.

Front

What describes the arrangement of a eukaryotic nucleosome?

Back

DNA complexed with an octamer of eight histone proteins.

Front

During which phase of the cell cycle does chromatin undergo the highest level of compaction to form visible chromosomes?

Back

Prophase

Front

What is the most accurate description of a nucleosome?

Back

A structure composed of DNA wrapped around a histone octamer.

Front

Components found in a eukaryotic nucleosome?

Back

DNA, H1 histone, and a histone octamer composed of two each of H2A, H2B, H3, and H4

Front

What is the primary function of centromeres in DNA packaging?

Back

Serving as the point of attachment for spindle fibers during cell division.

Front

What is the arrangement of a eukaryotic nucleosome?

Back

DNA complexed with an octamer of eight histone proteins.

Front

What is the primary role of the centromere in DNA packaging and chromosome function within eukaryotic cells?

Back

To serve as the site for kinetochore assembly and spindle fiber attachment during cell division.