MCB Exam 1 Review Questions And Answers Latest Top Score.
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MCB
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MCB
MCB Exam 1 Review Questions And Answers Latest Top Score.
1. Highly condensed chromatin that is transcriptionally inactive is called - correct answer. Heterochromatin
1. If you were to make a synthetic form of DNA in which the phosphate group is substituted by a chemical group e...
MCB Exam 1 Review Questions And
Answers Latest Top Score.
1. Highly condensed chromatin that is transcriptionally inactive is called - correct
answer. Heterochromatin
1. If you were to make a synthetic form of DNA in which the phosphate group is
substituted by a chemical group exhibiting a net positive charge, the resulting synthetic
DNA" - correct answer. Would likely not be packaged by histones
The major structural proteins in human chromatin are known as - correct answer.
histones
The main function of the centromere is to - correct answer. Allow the proper
distribution of chromosomes to daughter cells during mitosis
1. The extent of chromatin condensation does not varies during the life cycle of the cell -
correct answer. True
"In Saccharomyces cerevisiae, functional centromeres have been shown to consist of a
sequence spanning about 125 bp" - correct answer. False
"In mammalian cells, the phenomenon of RNA interference is mediated by " - correct
answer. mIRNAa
1. "In most normal cells in our body, the fraction of DNA that appears to remain as
heterochromatin during interphase is about" - correct answer. 10%
1. "During this stage of the cell cycle chromosomes reach their maximum level of
condensation" - correct answer. Metaphase
1. "If you were to take all the chromosomes from a single human cell, open them up and
place them down fully extended one next to the other, the full length that would be
covered by them would be about" - correct answer. 2 meters
, 1. The thickness of the structure produced by DNA packed around histones in the form
of beads-on-string is approximately - correct answer. 10nm
1. The core histones are - correct answer. H2A, H2B, H3, H4
Centromeres are present throughout the entire cell cycle - correct answer. True
"The only histone that is NOT considered to be a core histone is H1, which is
characterized - correct answer. by being about twice as large and having at least
20% more positively-charged amino acids than the other histones
The centromere-associated protein structure that provides an anchoring surface to the
mitotic spindle is known as - correct answer. Kinetochore
"In humans, a defining characteristic of centromeric regions is the present of" - correct
answer. a variant form of histone H3 known as CENP-A
Further coiling of the basic beads-on-a-string chromatin fiber generates a thicker fiber
whose thickness is about - correct answer. 30 nm
The level of condensation of a gene is an important factor dictating whether the gene
will be well expressed or not - correct answer. True
Human chromosomes are a linear molecule of double stranded DNA - correct answer.
True
Human chromosomes are a linear molecule of single stranded DNA - correct answer.
False
_________carry within their sequence a region coding for reverse transcriptase -
correct answer. LINEs
Gene duplication by _________ usually yields an inactive gene copy called a processed
pseudogene - correct answer. Reverse transcriptase
The human genome contains approximately __________ protein coding genes -
correct answer. 21,000
From an evolutionary point of view ________ could be considered to be both the most
successful and the most damaging sequences present in our genome - correct answer.
Retrotransposons
The presence of ______ allows for the synthesis of __________ - correct answer.
Introns; different proteins from a single gene
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