Exam (elaborations)
MICROBIOLOGY210 EXAM 2 QUESTIONS AND ANSWERS
- Course
- Institution
MICROBIOLOGY210 EXAM 2 QUESTIONS AND ANSWERS...
[Show more]
Content preview
The three basic parts of a DNA nucleotide are: - ANSWER phosphate,deoxyribose sugar, nitrogenous base
The two strands of DNA are joined together by: - ANSWER hydrogen
bonding
The specific point on the DNA where replication begins is the: -
ANSWER origin of replication
Early in the process of DNA replication, the enzyme ___________
separates the two strands. - ANSWER helicase
DNA polymerase requires what? - ANSWER a template for the synthesis
of DNA
If an organism lost the ability to make primase, what would it be unable
to do? - ANSWER Add a short sequence of complementary RNA to the
existing DNA strand.
Two different mechanisms for copying the DNA strands are used
because? - ANSWER The strands are oriented in opposite directions
What strand of DNA is transcribed? - ANSWER 5' to 3' direction or
"leading strand"
What reads codons? - ANSWER tRNA
What occurs during DNA replication? - ANSWER Duplicates the DNA
molecule so its encoded information can be passed on to the next
generation
, Define the purpose of transcription - ANSWER Copies the information
from DNA into RNA
Define the purpose of translation - ANSWER interprets the information
carried by RNA to synthesize the encoded protein
List the three types of RNA required for gene expression - ANSWER 1.
tRNA
2. mRNA
3. rRNA
How many replication forks occur during DNA replication? - ANSWER 2
Replication is _________ and begins at the ______ of replication -
ANSWER Replication is semiconservative and begins at the origin of
replication
DNA gyrase - ANSWER Enzyme that temporarily breaks the strands of
DNA, relieving the tension caused by unwinding the two strands of the
DNA helix
DNA ligase - ANSWER Enzyme that joins two DNA fragments together
by forming a covalent bond between the sugar and phosphate residues
of adjacent nucleotides
DNA polymerases - ANSWER Enzymes that synthesize DNA; use one
strand of DNA as a template; synthesis always occurs in the 5' to 3'
direction
Helicases - ANSWER Enzymes that unwind the DNA helix at the
replication fork
Origin of Replication - ANSWER Distinct region of DNA molecule at
which replication is initiated
Primase - ANSWER Enzyme that synthesizes small fragments of RNA to
serve as primers for DNA synthesis
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 Boostertips. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80630 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now