Related Questions
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.
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
Failure of spindle fibers to attach correctly to the kinetochores can result in:
Normal cell division
Apoptosis
Nondisjunction
Interphase arrest
In a submetacentric chromosome, the shorter arm is designated as:
p
q
m
s
In which type of chromosome does the centromere lie exactly at the midpoint?
Acrocentric
Metacentric
Submetacentric
Telocentric
A researcher isolates chromatin fibers and treats them with a nuclease that specifically cleaves linker DNA. Following this treatment, what would be the approximate size distribution of the DNA fragments observed?
Approximately 200 bp
Approximately 1000 bp
Approximately 50 bp
A wide range of sizes from 200 bp to several thousand bp
Spindle fibres attach on to:
Telomere of the chromosome
Kinetochore of the chromosome
Centromere of the chromosome
Kinetosome of the chromosome
Nucleosomes help to:
Translate DNA
Replicate DNA
Package DNA into a compact structure
Transport DNA out of the nucleus
In which stage of mitosis do spindle fibers begin to attach to kinetochores?
Prophase
Metaphase
Anaphase
Prometaphase
In eukaryotes, the fundamental repeating unit of chromatin is called a:
Solenoid
Chromatid
Centromere
Nucleosome
