nucleic acids and gene expression 1 kahoot Qs Flashcards
During RNA processing what structures are spliced out of the RNA?
Introns
Which of the following is not included in the components of a nucleotide?
A central carbon
DNA nucleotides are very similar to RNA nucleotides accept they lack a ___ bound to their _____.
O, 2’ C
How many rings comprise a Purine?
1
Which of the following is not a pyrimidine?
Guanine
Between what two structures does a Phosphodiester bond form
Pentose sugar (3’ C), phosphate group
DNA is structured similar to a ladder, the vertical sides of a ladder are most similar to what?
Pentose Sugars and Phosphate groups
A phosphate group is bound to which carbon in a Nucleotide?
5’
Cytosine interacts with ___________ and forms ___ Hydrogen bonds
Guanine, 3
Thiamine interacts with _______ and forms ________ H bonds
Adenine, 2
The interaction of a strand of DNA as well as histones represents what level of DNA structure?
4th
A phosphodiester bond represents which level of DNA structure?
2nd
A bond between a Phosphate group and a pentose sugar represents what level of DNA structure?
1st
Why do RNA strands form a hairpin loop?
They lack a complimentary strand
Which of the following best describes the first arrow: DNA->RNA->Protein
Transcription
A gene:
A section of a chromosomes
Sigma factor appears in
Prokaryotes
During initiation of transcription in prokaryotes which is true regarding sigma factor
- Sigma binds to RNA polymerase first
- Sigma binds to the mRNA strand first
- Sigma binds to DNA first
- Sigma binds to acetyl CoA in order to bind to the mRNA strand first
Sigma binds to RNA polymerase first
The mRNA strand is complementary to…
The template strand
The mRNA strand is similar to…..
Coding strand
The coding strand and mRNA strand are very similar, accept the coding strand’s __ are replaced with __
T’s, U’s
The ______ strand is read by RNA polymerase.
Template
Non coding
RNA is synthesized in the ________ direction
5’ to 3’
The first step of transcription in prokaryotes is…..
Sigma binds to RNA polymerase
Next…
Sigma delivers RNA polymerase to the DNA strand
In order for the delivered RNA polymerase to synthesize mRNA what must happen?
The hydrogen bonds in the DNA double helix must break
The mRNA strand is released when RNA polymerase reaches ______.
Arnold, Terminator
Which end of the mRNA is the poly A tail added to?
3’
