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What part of a DNA molecule contains the instruction of making chromosome packaging proteins?
In prokaryotes the genes directly specify proteins.In eukaryotes the exons within the genes specify proteins, the introns within the genes are noncoding DNA that alternate with exons and are spliced out in the process of transcription to messenger RNA.
Protein synthesis in eukaryotes is similar to the process in prokaryotes in that both eukaryotes and prokaryotes?
Both eukaryotes and prokaryotes use transcription and translation to synthesize proteins. In both processes, the genetic information stored in DNA is converted into RNA molecules, which are then used to assemble amino acids into proteins. However, there are also significant differences between the two processes, such as the presence of introns and exons in eukaryotic genes and the organization of ribosomes during translation.
Regulatory proteins in eukaryotes that are involved in controlling the onset of transcription are called?
Transcription factors are regulatory proteins in eukaryotes that control the initiation of transcription by binding to specific DNA sequences near genes and either activating or repressing their transcription. This binding helps regulate the expression of genes by influencing the binding of RNA polymerase to the promoter region of a gene.
What are the pieces of a split gene called in eukaryotes?
exons - good parts of gene that code for amino acids introns- "junk DNA" that do not code for amino acids of a protein ( before leaving the nucles mRNA must have these removed, then it can travel into the cytoplasm)
Are exposons the portions of DNA molecules that code for the production of proteins?
Exons are what are expressed while introns are spliced out.
What part of a DNA molecule contains the instruction of making chromosome packaging proteins?
In prokaryotes the genes directly specify proteins.In eukaryotes the exons within the genes specify proteins, the introns within the genes are noncoding DNA that alternate with exons and are spliced out in the process of transcription to messenger RNA.
In eukaryotes only exons are translated?
Correct. The mRNA transcibed from the DNA in the nucleus has both exons and introns; the introns are taken out and the exons are left in. The mended exons exit the nucleus and the introns stay in the nucleus. Only the exons are translated at the ribosomes. (In Eukaryotic cells only)
What happens to the introns and exons during transcription?
After transcription, the mRNA is processed by the spliceosome, which splices out the introns (because introns are not part of the coding sequences for protein), and "stitches" the exons together to form the final transcript that is sent to the ribosome for translation.
Where does transcription occurs in eukaryotes?
in the cytoplasm
The process of joining exons together to form an mRNA molecule is called?
Transcription
What kind of organisms use transcription factors?
Eukaryotes
What are three differences between transcription in prokaryotes and transcription in eukaryotes?
In prokaryotes, transcription occurs in the cytoplasm since they lack a nucleus, while in eukaryotes, transcription occurs in the nucleus. Prokaryotic transcription is often coupled with translation, meaning ribosomes can start translating mRNA even before transcription is complete, whereas in eukaryotes, transcription and translation are spatially and temporally separated. Prokaryotic mRNA does not typically undergo extensive processing (such as splicing or capping) after transcription, whereas eukaryotic mRNA is extensively processed before being translated.
Describe how RNA is processed in eukaryotes What is the purpose of each step?
In eukaryotes, RNA is processed in several steps: 1) capping at the 5' end with a modified nucleotide to help with stability and mRNA export from the nucleus; 2) splicing to remove introns and join exons together to create a mature mRNA transcript; 3) adding a poly-A tail to the 3' end to protect the mRNA from degradation and enhance translation efficiency. Each step prepares the mRNA for proper function in protein synthesis.
What are the sense portions of a pre-mRNA strand made in transcription called?
The sense portions of a pre-mRNA strand made in transcription are called exons. Exons contain the coding sequences that will be eventually translated into proteins. Non-coding sequences within the pre-mRNA, called introns, are removed during RNA processing to produce the mature mRNA molecule.
What is the Mrna sequence?
Eukaryotic genes have regions called "introns" and "exons". Exons code for polypeptides (often specific domains or motifs), while introns don't code for anything (that we know of) and are removed. mRNA splicing is the process where an mRNA molecule is cut up (usually by the "spliceosome") to remove the introns from an mRNA message. This is advantageous for us eukaryotes because we can recombine exons in different orders, and even combine exons from different genes to generate many proteins from a smaller number of genes.
Are intron transcribed into the primary transcript?
No. The introns must be cut out of RNA before transcription. This is because a ribosome cannot read introns, and can only read axons. They are cut out and the axons are attached together to go through ribosome.
Protein synthesis in eukaryotes is similar to the process in prokaryotes in that both eukaryotes and prokaryotes?
Both eukaryotes and prokaryotes use transcription and translation to synthesize proteins. In both processes, the genetic information stored in DNA is converted into RNA molecules, which are then used to assemble amino acids into proteins. However, there are also significant differences between the two processes, such as the presence of introns and exons in eukaryotic genes and the organization of ribosomes during translation.
