Molecular Biology Exam questions and answers graded A+

Molecular Biology Exam questions
and answers graded A+
Short micro RNAs (miRNAs) - ANS✅✅are involved in regulation of gene expression



In eukaryotes, tandemly repeated genes encode - ANS✅✅rRNAs



All the following statements about heterochromatin except:

All the following statements about heterochromatin except:

It is a dark-staining area of a chromosome.

It is usually transcriptionally active.

It is often simple sequences of DNA.

It is a region of condensed chromatin. - ANS✅✅it is usually transcriptionally active



The less condensed form of chromatin is and the inactive form of chromatin is -
ANS✅✅Euchromatin/ Heterochromatin



If DNA structure is described as "beads-on-a-string," a "bead" is a [A]. - ANS✅✅nucleosome core
particle



Histone modifications play integral roles in chromatin condensation and function. Which of the
following is not considered to be a histone modification?

acetylation

methylation

phosphorylation

prenylation - ANS✅✅prenlyation



All of the following can be found in chromatin except:

DNA

RNA

histones

transcription factors - ANS✅✅RNA