Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
What Unwinds and "unzips" the double-stranded DNA
|
helicase
|
|
|
What keeps the strands separated to await replication?
|
single stranded Binding Proteins
|
|
|
What attaches a short Segment of RNA to the DNA template strand?
|
Primase
|
|
|
What enzyme positions and joins new complementary DNA nucleotides
|
DNA Polymerase
|
|
|
What seals any breaks in the sugar-phosphate backbone?
|
Ligase
|
|
|
Describe the difference between DNA Polymerase and Primase
|
Primase: RNA nucleotides
DNA Polymerase: DNA nucleotides |
|
|
Why are two strands of DNA anti parallel?
|
The nitrogenous bases form in opposite directions and never hit each other
|
|
|
Why is the over all replication of DNA 5 to 3?
|
Goes 5 to 3 because DNA Polymerase can only attach new nucleotides to the open 3 end
|
|
|
If Helicase was not present for DNA replication what would happen to the DNA strand?
|
it would stay wound
|
|
|
Name the process of writing DNA into mRNA.
|
Transcription
|
|
|
Name three differences between DNA and RNA
|
-RNA has an extra oxygen compared with DNA
-RNA has Uracil and not Thymine -RNA is single stranded |
|
|
Name the enzyme used in writing DNA into RNA
|
RNA Polymerase
|
|
|
How many amino acids are there in the human species
|
20
|
|
|
How many nucleotides on mRNA does it take to code for an amino acid?
|
3
|
|
|
What is the mRNA triplet called on the mRNA strand?
|
codon
|
|
|
The process of cutting Introns out of the pre-mRNA strand is called
|
RNA processing
|
|
|
The type of RNA used to form ribosomes is called what?
|
rRNA
|
|
|
The type of RNA that brings amino acids to the ribosomes is called what?
|
tRNA
|
|
|
The first codon in mRNA sequence is what?
|
start
|
|
|
The last codon in a mRNA sequence is what?
|
stop
|
|
|
Name the sequence of sites on the ribosomes in which a tRNA places its self.
|
A, P, and E
|
|
|
What is the triplet of RNA nucleotides found on the tRNA strand that base pair with the codon
|
Anti-codon
|
|
|
What process does not take the energy in the elongation of a polypeptide strand?
|
peptide bond
|
