What are the 2 steps of gene expression?
The process of gene expression involves two main stages: Transcription: the production of messenger RNA (mRNA) by the enzyme RNA polymerase, and the processing of the resulting mRNA molecule….Translation involves four steps:
- Post-translation processing of the protein.
What are the 2 parts of a gene?
Every gene consists of several functional components, each involved in a different facet of the process of gene expression (Figure 2-1). Broadly speaking, however, there are two main functional units: the promoter region and the coding region.
What are the 2 major steps of protein synthesis?
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus.
What is the correct sequence of the following events of protein synthesis?
The correct sequence of events in protein synthesis is transcription then translation. First, during transcription DNA is copied to mRNA in the nucleus. Then, mRNA is edited, processed and exported to the cytoplasm. Next, translation occurs.
What is the site of protein synthesis in the cell?
Which organelle is important for protein synthesis?
How are proteins made in a cell?
Proteins are the key working molecules and building blocks in all cells. They are produced in a similar two-step process in all organisms – DNA is first transcribed into RNA, then RNA is translated into protein.
What is the relationship between DNA RNA and protein?
Functionally, DNA maintains the protein-encoding information, whereas RNA uses the information to enable the cell to synthesize the particular protein.
What is the relationship between protein and DNA?
DNA carries the genetic information for making proteins. The four bases A, T, C and G make up the genetic code. The base sequence determines amino acid sequence in protein.
What is the difference between DNA and protein?
DNA contains the genetic information of all living organisms. Proteins are large molecules made up by 20 small molecules called amino acids. All living organisms have the same 20 amino acids, but they are arranged in different ways and this determines the different function for each protein.
What comes first DNA or protein?
One possible solution is the so-called RNA World approach, in which RNA came before either proteins or DNA. This solution is attractive because RNA combines some of the features of proteins and DNA. RNA can catalyze chemical reactions just like proteins, and it can store genetic information just like DNA.
What comes first RNA or DNA?
It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene. However, single-stranded RNA is rather unstable and is easily damaged by enzymes.
How does DNA and RNA work together?
Cells make RNA messages in a process similar to the replication of DNA. The DNA strands are pulled apart in the location of the gene to be transcribed, and enzymes create the messenger RNA from the sequence of DNA bases using the base pairing rules. 3. RNA molecules made in a cell are used in a variety of ways.