What enzyme puts together the complementary strand of RNA?

What enzyme puts together the complementary strand of RNA?

RNA polymerase
Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand.

What enzyme is responsible for building the complementary strand?

The primary enzyme involved in this is DNA polymerase which joins nucleotides to synthesize the new complementary strand. DNA polymerase also proofreads each new DNA strand to make sure that there are no errors.

What is the enzyme that builds RNA?

Transcription is the first step in decoding a cell’s genetic information. During transcription, enzymes called RNA polymerases build RNA molecules that are complementary to a portion of one strand of the DNA double helix (Figure 3).

What enzymes make RNA primers?

Primase
Primase is an enzyme that synthesizes short RNA sequences called primers. These primers serve as a starting point for DNA synthesis. Since primase produces RNA molecules, the enzyme is a type of RNA polymerase.

What enzyme replaces RNA with DNA?

DNA polymerase I
RNA primers are removed and replaced with DNA by DNA polymerase I. The gaps between DNA fragments are sealed by DNA ligase.

What enzyme initiates DNA synthesis?

DNA polymerase
The enzyme that synthesizes DNA, DNA polymerase, can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template. An enzyme, DNA polymerase, is required for the covalent joining of the incoming nucleotide to the primer.

What nucleic acids are purines?

The purines in DNA are adenine and guanine, the same as in RNA. The pyrimidines in DNA are cytosine and thymine; in RNA, they are cytosine and uracil.

Which enzyme assembles a complementary strand of RNA on a DNA template?

RNA polymerase the enzyme that assembles a complementary strand of RNA on a DNA template is __ promoter The region of DNA where the production of an RNA strand begins is called the __ exons __ are spliced together in forming messenger RNA genetic code the sequence of bases that serves as the “language of life” anticodon

How do you add nucleotides to DNA polymerase?

DNA polymerase needs an “anchor” to start adding nucleotides: a short sequence of DNA or RNA that is complementary to the template strand will work to provide a free 3′ end. This sequence is called a primer (Figure 4).

What is the role of DNA primase in DNA replication?

In replication, before DNA polymerase iii can begin synthesizing DNA primers must be present on the template generally short segments of RNA synthesized by an enzyme called “ Primases ”. DNA primase has molecular weight 60,000 Dalton and contains only a single subunit, which functions synthesize RNA primers.

What is the enzyme that catalyzes transcription?

The enzymes that perform transcription are called RNA polymerases. Like the DNA polymerase that catalyzes DNA replication (discussed in Chapter 5), RNA polymerases catalyze the formation of the phosphodiester bonds that link the nucleotides together to form a linear chain.