Chromatin Quiz

Different parts of interphase chromosomes have a different degree of compaction. Determine the type of chromatin which has an functional importance, a lower density and greater genetic activity.

• euchromatin

• homochromatin

• obligate heterochromatin

• constitutive heterochromatin

• optional heterochromatin

Determine the type of chromatin that is characterized by greater compaction and genetic inertness.

• euchromatin

• homochromatin

• nucleochromatin

• polychromatin

• heterochromatin

Determine the type of chromatin that is characterized by the presence of unique fractions of nucleotide sequences.

• euchromatin

• homochromatin

• obligate heterochromatin

• constitutive heterochromatin

• optional heterochromatin

Determine the type of chromatin that is characterized by the presence of a repetitive fraction of nucleotide sequences.

• nucleochromatin

• euchromatin

• homochromatin

• polychromatin

• heterochromatin

What is the name of the structure in the interphase nucleus, consisting of a complex of DNA with nuclear (histone and non-histone) proteins?

• genome

• nucleoid

• gene pool

• chromatin

• tetramer

Chromatin characterized by functional activity, replication and transcription processes

• euchromatin

• homochromatin

• obligate heterochromatin

• constitutive heterochromatin

• optional heterochromatin

In humans, one of the two X chromosomes is tightly packed and at the interphase stage is located under the nuclear membrane in the form of a Barr's little body. Which of the following chromatin types corresponds to this?

• euchromatin

• homochromatin

• obligate heterochromatin

• constitutive heterochromatin

• facultative heterochromatin

In an electron micrograph, the scientist discovered a structure formed by eight molecules of histone proteins and a section of a DNA molecule that makes approximately 1.75 turns around them. What structure did the researcher find?

• nucleosome

• nucleomeric fibril

• chromonema

• chromatid

• chromosome

A woman turned to a medical genetic consultation on the issue of excluding hereditary pathology. What chromosomes are missing in the normal human karyotype?

• Chromosomes with secondary constrictions

• Metacentric

• Submetacentric

• Acrocentric

• Telocentric

Determine the level of chromatin compaction, which has a solenoid-like structure.

• Beads on a string (1st level)

• Chromatin fibril (2-nd level)

• 3rd level

• 4th level