NEW BIO251 - EXAM 2 ACTUAL EXAM WITH CORRECT ANSWERS GRADE A+
11 views 0 purchase
Course
NEW BIO251
Institution
NEW BIO251
NEW BIO251 - EXAM 2 ACTUAL EXAM WITH
CORRECT ANSWERS GRADE A+
3 main process of DNA replication - -answer-- initiation
- elongation
- termination
Central Dogma - -answer-DNA -> RNA -> Protein
The process by which DNA is used to encode proteins
what some of the characteristics of tra...
NEW BIO251 - EXAM 2 ACTUAL EXAM WITH
CORRECT ANSWERS GRADE A+
3 main process of DNA replication - -answer-- initiation
- elongation
- termination
Central Dogma - -answer-DNA -> RNA -> Protein
The process by which DNA is used to encode proteins
what some of the characteristics of transcription/RNA - -
answer-- Only specific regions are copies
- RNA strands are produced, which do not bind with the DNA
(exist as single strands)
- No proofreading
what are the 5 steps in transcription - -answer-Step 1: RNA
polymerase binds to the promoter (a regulatory region directly
upstream of the gene) and initiates DNA unraveling
Step 2 : RNA polymerase facilitates the assembly of free
ribonucleotides into chains of RNA, using the DNA as a template
Step 3: The RNA polymerase continues along the gene adding to
the RNA chain, which does not permanently pair with the DNA,
but exists as a single strand
Step 4: RNA synthesis continues until the RNA polymerase
encounters a specific region of DNA known as a terminator
,Step 5: Once the terminator is reached, the RNA polymerase
stalls and a rho termination protein facilitates the RNA
polymerase and RNA strand to disassociate from the DNA
The DNA is re-wound and the RNA is free to go on to the next
step
name for groups of 3 base pairs of the mRNA - -answer-codons
how many codons are non-coding or stop codons? - -answer-3
are non-coding or stop codons
only 61 of the 64 encode amino acids
which molecule can bind both RNA and amino acids - -answer-
T-RNA
group of three bases on a tRNA molecule that are
complementary to an mRNA codon - -answer-Anticodon
t-RNA is considered to be "charged" - -answer-when an amino
acid is bound to t-RNA
how many different t-RNA there are - -answer-64, one for each
codon
the study of how the heredity material (DNA and RNA) is
transferred. - -answer-genetics
all genetic material in a cell - -answer-genome
what is the sub division of genome - -answer-- chromosome
- plasmid
,what is the sub division of chromosomes - -answer-genes
(coding region)
non-coding region
what composes the DNA back bone - -answer-sugar
phosphate
which are the 4 nucleotides in DNA - -answer-Adenine
Thymine
Cytosine
Guanine
Uracil (only in RNA)
what is the difference between bacterial and Eukaryota
chromosomes - -answer-Most bacteria have only one circular
chromosome, whereas eukaryotes tend to have multiple linear
chromosomes
Why is DNA semi-conservative? - -answer-When DNA divides,
each copy receives one half of the original DNA and one half new
DNA.
enzyme(s) that uncoiled the DNA - -answer-topoisomerase and
gyrase, and begins at a region called the origin of replication
enzyme that unwinds and begins separating the DNA strands in
both directions - -answer-helicase
enzyme that stabilize the single stranded DNA - -answer-single
strand binding proteins
, what is required for the addition of nucleotides in DNA
replication? - -answer-a free 3' hydroxyl group
enzyme that adds an RNA primer to the strand being replicated -
-answer-primase
enzyme that makes sure the proper nucleotide is bound, and
connects it to the growing DNA strand - -answer-DNA
polymerase
DNA lagging strand - -answer-- DNA is synthesized in pieces
- multiple RNA primers are added
- assembled together by the enzymes DNA -polymerase and
ligase
the structures where protein synthesis (translation) occurs - -
answer-Ribosomes
which are the 2 microbial ribosome subunits - -answer-the 30S
and 50S, which come together to form a functional 70S ribosome
what does the "S" in ribosomal subunits stands for - -answer-
Svedberg units, which measures the rate of sedimentation
during centrifugation
what are the 3 functional domains of the large microbial
ribosome subunit - -answer-Aminoacyl site (A)
site of entry for tRNA's
Peptidyl (P) site
Site of peptide bond formation
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 docciel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.29. You're not tied to anything after your purchase.
