bio1030 final prep
A new nucleotide can only be added to the ____ end of a growing DNA strand. DNA therefore always grows in the ____ direction
3' and 5' to 3'
The leading strand is the daughter strand that has its ____ end pointed toward the replication fork abd is therefore synthesized ______
3' and continuously
In DNA replication, each individual parent strand acts as a ____ strand for the synthesis of a ____ strand
template and daughter
The enzyme that caralyzes the addition of new nucleotides to a growing DNA strand is _____
DNA polymerase
As a piece of linear DNA is replicated, the leading strand will have ____ RNA primer(s) and the lagging strand will have ___ RNA primer(s)
one and many
The enzyme responsible for joining Okazaki fragments together during DNA replication is _____
DNA ligase
Consider the end of a DNA strand in a double stranded molecule that has become shorter as a result of DNA replication. this end will further be shortened after how many rounds of replication?
every round of replication
The enzyme ____ compensates for chromosomes shortening at the tips after each round of DNA replication?
Telomerase
We say that DNA is semi-conservative which means ____
When DNA is replicated each new double helix contains one parental strand and one newly synthesized daughter strand
What is the name of the enzyme complex that forms at the start if the transcription?
RNA polymerase
If you made a change in the promoter sequence in the DNA that inactivates the promtor, what would happen at the RNA level?
The RNA polymerase would not be able to recognize and bind the DNA, so no RNA would be made
In eukaryotes, where do general transcription initiation factors bind?
Promoters
What are the purines?
Adenine and guanine
pyrimidines are ____
cytosine and thymine