what is the difference between helicase and rna polymerase?
310105
The enzyme DNA helicase breaks the hydrogen bonds between the bases in a specific region of the DNA molecule. This causes the two strands to separate and unwind, exposing nucleotide bases. The enzyme RNA polymerase binds to the template strand of DNA at the beginning of the sequence to be copied.
1006079
Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
1230697
['Helicase. Uses the hydrolysis of ATP to "unzip" or unwind the DNA helix at the replication fork to allow the resulting single strands to be copied.', "Primase. Polymerises nucleotide triphosphates in a 5' to 3' direction. ... ", 'DNA Polymerase III. ... ', 'DNA Polymerase I. ... ', 'Ligase. ... ', 'Telomerase. ... ', 'Nuclease. ... ', 'Topoisomerase.']
788264
-DNA is double-stranded, RNA is single-stranded. - DNA contains a pentose sugar Deoxyribose, RNA contains the pentose sugar Ribose. A pentose is a 5-carbon sugar molecule. - DNA is limited to the nucleus, RNA is made in the nucleus, but can travel outside of it.
1311930
The enzyme RNA polymerase binds to the template strand of DNA at the beginning of the sequence to be copied. Transcription can be explained easily in 4 or 5 simple steps, each moving like a wave along the DNA. RNA polymerase unwinds/"unzips" the DNA by breaking the hydrogen bonds between complementary nucleotides.
1060152
RNA polymerase II holoenzyme is a form of eukaryotic RNA polymerase II that is recruited to the promoters of protein-coding genes in living cells. It consists of RNA polymerase II, a subset of general transcription factors, and regulatory proteins known as SRB proteins.
136
Transcription copies the DNA into RNA, while replication makes another copy of DNA. Both processes involve the generation of a new molecule of nucleic acids, either DNA or RNA; however, the function of each process is very different, with one involved in gene expression and the other involved in cell division.
1386963
RNA polymerase. ... a small RNA that can catalyze a specific chemical reaction. Transcription and replication are alike in that both. are guided by complementary base pairing.
890780
DNA uses thymine and deoxyribose sugar, while RNA uses uracil and ribose sugar. While DNA is usually molded into a double-stranded helix, RNA is usually single-stranded, which allows for the binding of anticodons during translation.
680249
Both DNA replication and transcription involve binding complementary nucleic acids to DNA, yielding a new strand of either DNA or RNA. Both processes can lead to errors if an incorrect nucleotide is incorporated.
65084
['Helicase (unwinds the DNA double helix)', 'Gyrase (relieves the buildup of torque during unwinding)', 'Primase (lays down RNA primers)', 'DNA polymerase III (main DNA synthesis enzyme)', 'DNA polymerase I (replaces RNA primers with DNA)', 'Ligase (fills in the gaps)']
839487
Transcription by RNA polymerase. An RNA strand is synthesized in the 5′ → 3′ direction from a locally single stranded region of DNA.
1149129
RNA-dependent RNA polymerase. The RdRp catalyzes the synthesis of RNA using an RNA template. Two features have made this enzymic activity difficult to study. First, it is usually associated with membrane structures in the cell and, on isolation, the enzyme(s) often become(s) unstable.
745834
RNA polymerase I. RNA polymerase 1 (also known as Pol I) is, in higher eukaryotes, the polymerase that only transcribes ribosomal RNA (but not 5S rRNA, which is synthesized by RNA polymerase III), a type of RNA that accounts for over 50% of the total RNA synthesized in a cell.
1116977
The RNA primers are made by RNA primase, and the Okazaki fragments are joined by DNA ligase. DNA polymerase is the enzyme that carries in the daughter nucleotides, and DNA helicase is the one that unwinds the double helix to open the replication fork.
472622
DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. ... DNA is a double-stranded molecule, while RNA is a single-stranded molecule. DNA is stable under alkaline conditions, while RNA is not stable. DNA and RNA perform different functions in humans.
546416
First, the enzyme reverse transcriptase uses the mRNA template to produce a complementary single-stranded DNA strand called cDNA in a process known as reverse transcription. Next, DNA polymerase is used to convert the single-stranded cDNA into double-stranded DNA.