14) Why are telomeres so important in eukaryotic organisms: A) Without telomeres, important DNA could be lost every time the cell divides. B) They cap the mRNA, allowing it to pass through the nuclear membrane to the cytoplasm translation. C) They provide a repetitive DNA sequence needed by primers to recognize the beginning a transcription. D) They remain relatively undamaged from environmental stress and toxins.

Heterochromatin consists of a) region of euchromatin devoid of histones. b) an AT-rich region occurs every 200 base pairs. c) decondensed, transcriptionally active chromatin. d) highly condensed, transcriptionally inactive chromatin

Which is the expected outcome following the deacetylation of histones? a) Coiling of chromatin, preventing it from being accessed by transcriptional machinery b) Coiling of chromatin, allowing it to be accessed by transcriptional machinery c) Uncoiling of chromatin, preventing it from being accessed by transcriptional machinery d) Uncoiling of chromatin, allowing it to be accessed by transcriptional machinery

Which of the following among A-Cis not needed for bacterial transcription Y A) O core RNA polymerase function B) Oa promoter C) O signma factor D) OA-C are all required for transcription

Which of the following is not a reason that gene transcription is selective (occurs on specific segments of DNA)?Group of answer choices a) in eukaryotes, transcribed mRNA is processed to add a poly-A tail b) sigma factors direct RNA polymerase where to bind the DNA template c) promoters differ from gene to gene

According to the histone-code hypothesis, what is one way that cell specialization occurs? a) Differential DNA methylation patterns b) Variation in enhancers in different cells c) TFII transcription factors binding to different histones in a cell-specific manner d) Differential expression of histone modifying enzymes e) Different histones are expressed in different cells

Histone H1: a) makes up the core particle  b) associates with linker DNA c) is not present in the 30 nm fiber  d) none of the above