Roxanita
Forum Senior
Topics: 16
Posts: 108
|
Q-)To start a complimentary DNA synthesis on a parent strand, DNA polymerases require a primer which is:
a)Protein complex enabling DNA polymerase to access parent DNA strands.
b)Short DNA oligonucleotide synthesized on the parent strand.
c)Short RNA oligonucleotide synthesized on the parent strand.
d)An enzyme which initiates DNA synthesis.
___________________
"We all basically have 2 choices in life: Let things stay the way they are or work to make them better"
-Julia Havey
|
| suvi21
Forum Junior
Topics: 6
Posts: 81
|
c) short RNA oligo
|
| rida
Forum Guru
Topics: 109
Posts: 721
|
C i believe
___________________
"If He takes you to it, He'll take you through it."
|
| Roxanita
Forum Senior
Topics: 16
Posts: 108
|
Rp: c)
To initiate synthesis of a complementary DNA on a parent strand...
...All DNA polymerases require a primer: a double-stranded region with a free hydroxyl group on the 3’-end. This is accomplished by a specific enzyme, primase, which synthesizes short stretches of RNA (5 - 60 nucleotides in length).
Using the 3’-hydroxyl group of the RNA primer as the acceptor of the first deoxyribonucleotide, DNA polymerase starts the chain elongation process. The primase molecule is directly linked to DNA helicase forming a multi-subunit protein complex, primosome, on the lagging (not leading) strand. Primase is essential for DNA replication in both in prokaryotic and eukaryotic cells. In contrast to DNA-dependent RNA polymerase, primase is resistant to the antibiotic rifampin.
___________________
"We all basically have 2 choices in life: Let things stay the way they are or work to make them better"
-Julia Havey
|
|
| |
| | | | |
