Which of the following is associated with the synthesis of secretory proteins?
Balbiani rings
Nucleolus
Centromere
Telomere
Related Questions
Balbiani rings are prominent structures found in:
Polytene chromosomes
Lampbrush chromosomes
Meiotic chromosomes
Mitotic chromosomes
Failure of spindle fibers to attach correctly to the kinetochores can result in:
Normal cell division
Apoptosis
Nondisjunction
Interphase arrest
The shorter and longer arms of a submetacentric chromosome are referred to as
S – arm and l – arm respectively
p – arm and q – arm respectively
q – arm and p – arm respectively
m – arm and n – arm respectively
In which type of chromosome are Balbiani rings observed?
Polytene
Metacentric
Submetacentric
Acrocentric
Histone H1 plays a crucial role in the structure of chromatin. Which of the following statements regarding its interaction and function is INCORRECT?
H1 binds to the linker DNA between nucleosomes.
H1 helps to compact chromatin structure.
H1 interacts with the core histones within the nucleosome octamer.
H1 stabilizes the interaction of DNA with the nucleosome.
Which of the following correctly describes the arms of a submetacentric chromosome?
Shorter arm is 'p' and longer arm is 'q'
Both arms are equal in length
Shorter arm is 'q' and longer arm is 'p'
Shorter arm is 'm' and longer arm is 'l'
Which of the following is associated with the synthesis of secretory proteins?
Balbiani rings
Nucleolus
Centromere
Telomere
Certain histone modifications are associated with actively transcribed genes. Which of the following combinations is MOST likely to be found in the nucleosomes of such genes?
Methylation of H3K9 and H3K27; Deacetylation of H3 and H4
Phosphorylation of H2AX; Trimethylation of H3K9
Acetylation of H3 and H4; Trimethylation of H3K4
Ubiquitination of H2A; Trimethylation of H3K27
In an experiment, a researcher selectively removes histone H4 from chromatin. Which of the following is the MOST likely immediate consequence?
Increased condensation of the chromatin fiber.
Enhanced binding of RNA polymerase to promoter regions.
Specific activation of a subset of genes.
Significant destabilization of the nucleosome core and loss of DNA wrapping.
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
