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MCB Exam 2 Rats Questions and Answers 100% Solved | Already Graded A+ Extensive digestion of chromatin with micrococcal nuclease was found to yield particles called nucleosome core particles that appear as beads when viewed by electron microscopy. Which of the following is not found in the nu...

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  • October 22, 2024
  • 64
  • 2024/2025
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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

MCB Exam 2 Rats Questions and

Answers 100% Solved | Already Graded

A+


Extensive digestion of chromatin with micrococcal nuclease was found to

yield particles called nucleosome core particles that appear as beads when

viewed by electron microscopy. Which of the following is not found in the

nucleosome core particle?



a. Two molecules of H2A protein



b. Two molecules of H3 protein



c. Two molecules of H4 protein



d. One molecule of H1 protein - ✔✔d. One molecule of H1 protein

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

The transfer of information from parent to progeny that is not based on

DNA sequences is known as



a. epigenetic inheritance.



b. non-Mendelian genetics.



c. sex-linked inheritance.



d. Mendelian genetics. - ✔✔a. epigenetic inheritance.

In the chromatin around centromeres, nucleosomes are present that have a

unique structure in which the core protein _______ is replaced by _______,

and this variant of the nucleosome is required for protein assembly at the

kinetochore.



a. histone H3; CENP-A



b. histone H3; histone H5

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

c. histone H1; CENP-A



d. histone H1; histone H5 - ✔✔a. histone H3; CENP-A

During metaphase in actively dividing cells, DNA is in



a. heterochromatin.



b. nucleoli.



c. chromosomes.



d. euchromatin. - ✔✔c. chromosomes.

A centromere is a



a. region of euchromatin devoid of histones.



b. sequence at the end of chromatids.



c. region where proteins bind to form kinetochores.

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.



d. specific, repeated DNA sequence. - ✔✔c. region where proteins bind to

form kinetochores.

Heterochromatin gets its name from the fact that it contains a mixture of

active and inactive genes.



True or False - ✔✔False

The function of telomeres is to



a. condense the chromosomes in preparation for mitosis.



b. ensure chromosome replication and maintenance.



c. hold the sister chromatids together and bind the spindle during mitosis.



d. provide a binding site for DNA polymerase to initiate replication. - ✔✔b.

ensure chromosome replication and maintenance.

Interaction between the finger-like projections of histones with DNA is

based on a charge attraction

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