Gene expression begins with transcription and occurs in the <u>nucleus.</u> To create an <u>RNA molecule,</u> the DNA sequence of a gene must be copied. <u>RNA polymerases, </u>which join nucleotides to create an RNA strand, carry out transcription (using a DNA strand as a template).<u> Initiation, elongation, and termination</u> are the three phases of transcription.
- RNA polymerase is the enzyme responsible for constructing the messenger RNA transcript from the template DNA.
- The synthesis of mRNA always proceeds in a 5’ to 3’ direction. In eukaryotes, the nucleus is the site of mRNA synthesis, whereas, in prokaryotes, mRNA is formed in the cytoplasm. The process of transcription has three stages:
Initiation stage – RNA polymerase begins the synthesis by recognizing the gene present at the beginning of the template strand.
The polymerase binds to the specific sequence, which at present at the initial end of the template. These are called consensus sequences. Specific transcription factors facilitate the recognition and binding of the consensus sequence with RNA polymerase.
Elongation stage – the RNA polymerase copies the mRNA complementary to the coding strand. The process of elongation continues till the RNA polymerase reaches the terminal sequence. Certain factors facilitate the elongation process called extension factors.
Termination stage – RNA polymerase, upon reaching the termination sequence, stops the transcription. At this point, no more elongation is carried out. The nascent mRNA is released from the transcription bubble by either of the two processes:
- By formation of a hair loop structure that pulls the mRNA from the transcription complex or,
- A protein called Rho utilizes ATP to break the bonds and release the nascent mRNA.
learn more about transcription here: brainly.com/question/25703686
#SPJ4
Organisms decompose additional quickly after they square measure up-to-date with element. ... once Associate in Nursing organism is buried quickly, there's less decay and also the higher the prospect for it to be preserved. The arduous components of organisms, like bones, shells, and teeth have an improved probability of turning into fossils than do softer components.
Answer:
a. solar energy to chemical energy
Answer:
B.) The energy a spring has by being compressed
Explanation:
yessir