MICR 3033 Exam 2 Questions with Revised Answers Graded A+
7 views 0 purchase
Course
MICR 3033
Institution
MICR 3033
MICR 3033 Exam 2 Questions with Revised Answers Graded A+
7Q1-How does DNA interact with the core histone nucleosome? - Answer-DNA wraps around the core histone
7Q2-What is the length(fixed)of DNA(in base pairs) that wraps around a core nucleosome? - Answer-147 base pairs
7Q3-What is the 30...
MICR 3033 Exam 2 Questions with
Revised Answers Graded A+
7Q1-How does DNA interact with the core histone nucleosome? - Answer-DNA wraps
around the core histone
7Q2-What is the length(fixed)of DNA(in base pairs) that wraps around a core
nucleosome? - Answer-147 base pairs
7Q3-What is the 30-nm fiber structure in chromatin? - Answer-solenoid
7Q4-What is meant by the terms Chromatin? Euchromatin? and Heterochromatin? -
Answer-Heterochromatin is condensed chromatin which makes it inactive. Euchromatin
is relaxed chromatin which makes it an active chromatin
7Q5-How is DNA configured into chromatin, compacted to heterochromatin and
reversed to chromatin? - Answer-DNA wrap around the histones then are clamped by
H1
7Q6-Describe the double helix nature of DNA. Why is it that DNA is always found as a
double stranded, antiparallel and complementary molecule? - Answer-complementary,
antiparallel, DNA replication
7Q7-What are histones and the structural components(DNA/proteins)of a nucleosome?
- Answer-proteins in chromatin that DNA wrap around, 4 proteins found in histone (2,
2B, 3, 4)
7Q8-Ponder on how you would describe the structure of histones and DNA in a
nucleosome? Please consider all relevant structural information contained in histones
that relate to DNA packaging. - Answer-proteins form histone, histones form histone
core, DNA wraps around histone core to form nucleosome
7Q9-What are the five classes of histones found in nucleosomes?Why are only four
histones found in the core histone nucleosome? - Answer-H1, H2A, H2B, H3, H4
H1 clamps and is not part of the core histone
7Q10-What is the role of histone H1? - Answer-H1 clamps the DNA to the histone core
7Q11-Which histones are found in the core nucleosome, and how do they interact? -
Answer-H2, H2B, H3, H4
H2 interacts with H2B and
, H3 interacts with H4 to form dimers and then tetramer the tetramers then form a core
histone
7Q12-A nucleoid in prokaryotes is different from a nucleus in eukaryotes because? -
Answer-
7Q13-How are genes organized on a DNA molecule? Consider prokaryotes and
eukaryotes for gene organization strategies at the DNA level. - Answer-coding region
and regulatory
7Q14-Besides of ORFs (which encode the amino acid sequence of a given protein)
what other features are encoded and stored in DNA? - Answer-Micro RNAs,
transposons, centromeres, telomeres, ORI
7Q15-Why is it possible that genes are transcribed from both DNA strands
(parallel/antiparallel)? - Answer-RNA polymerase can transcribed both strands in both
directions continuous and semi continuous
7Q16-Why is telomerase a ribozyme? Explain? - Answer-Adding a little piece of DNA,
nonsense sequence that repeats itself many times
7Q17-in trying to define a centromere, what DNA and protein components you think we
should play attention to? - Answer-
7Q18-Why are origins of replication (ORI) populated by that many protein complexes? -
Answer-They depend on sequence and number of proteins that bind to that region
7Q19-How can microRNAs interfere with gene expression (mRNA abundance)of a
target gene? - Answer-mRNA will no longer be able to make a protein which will not
create the protein or expres the gene
8.1Q1-What is the Central Dogma of Molecular Biology? Speaking of Informational
Pathways which paths are "2-way streets" and which ones are not? - Answer-DNA to
DNA (2 way) DNA to RNA (2 way) RNA to protein (1 way)
8.1Q2-What are the key structural differences between RNA and DNA? - Answer-Uracil
nucleic acid instead of Thymine
8.1Q3-What is meant by the DNA double-helix being "anti-parallel"? - Answer-Run in
opposite directions
8.1Q4-Why is the double-helical structure of DNA an excellent mechanical solution in
DNA replication? - Answer-DNA polymerase replicates both strands in both directions
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Perfectscorer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
