Polytene chromosomes, found in certain insect tissues, exhibit distinct banding patterns. These bands represent:
Individual genes arranged linearly along the chromosome.
Regions of heterochromatin exclusively.
Regions where DNA replication has been halted prematurely.
Regions of highly condensed chromatin corresponding to inactive genes interspersed with less condensed regions of active genes.
Related Questions
If a chromosome has a centromere positioned so that one arm is noticeably shorter than the other, the chromosome is classified as _____ and the arms are referred to as ____ and ____, respectively.
submetacentric; p; q
metacentric; p; q
acrocentric; p; q
telocentric; p; q
In contrast to the core histones, histone H1's primary function relates to:
Forming the nucleosome core
DNA replication
Higher-order chromatin folding
Transcription initiation
Approximately how many base pairs of DNA are wrapped around a histone octamer in a nucleosome?
20
146
200
1000
Which of these processes is directly influenced by the level of chromatin compaction?
DNA replication
RNA processing
Gene expression
Protein translation
A chromosome with its centromere located precisely in the middle, dividing it into two arms of equal length, is classified as:
Telocentric
Metacentric
Acrocentric
Submetacentric
The large puffs on polytene chromosomes, known as Balbiani rings, are primarily involved in:
RNA synthesis
DNA replication
Protein degradation
Chromosome condensation
Which of the following is associated with the synthesis of secretory proteins?
Balbiani rings
Nucleolus
Centromere
Telomere
In a submetacentric chromosome, the shorter arm is designated as:
p
q
m
s
During cell division, spindle fibers attach to which specific structure on the chromosomes?
Centromere
Telomere
Chromatid
Kinetochore
If the centromere divides a chromosome into two equal halves, what type of chromosome is it?
Metacentric
Submetacentric
Acrocentric
Telocentric
