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All of the above statements are wrong!!
When the cell undergoes mitolia, during the S1 and S2 phases of the interphase, the cell synthesizes the relevant proteins, and then the nucleus will have mRNA synthesis to synthesize the protein, so that there is temporarily more RNA than the RNA in the cytoplasm
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Since this kind of cell has a nucleus, it must use DNA as genetic material (only viruses can use RNA as genetic material, and most viruses also have DNA, see for details.)
RNA is the most abundant RNA in cells, accounting for about 82% of the total amount of RNA. There is only a small amount of mRNA transcribed in the nucleus, and it can't be compared to the rRNA in the cytoplasm, so I don't think there is such a time as you are talking about!
Downstairs, you may not know that mRNA is very small in number, and it is easily hydrolyzed so that the nucleus can easily control the rate of protein synthesis by manipulating mRNA.
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You are mistaken, it can't be, ribosomes have a lot of RRNA, and there must be more in the cytoplasm than in the nucleus.
Unless you define the RNA as mRNA. This should happen when dormant spores or seeds germinate.
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When an organism uses RNA as its genetic material.
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When you get the answer wrong.
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If there is RNA in the nucleus, it is messenger RNA (i.e., mRNA), and the DNA in the nucleus is transcribed into mRNA, which is translated into protein through the nuclear pore and into the cytoplasm. Therefore, there is a lot of mRNA in the nucleus that is being transcribed and mRNA that is still in the nucleus.
The nucleus is the control center of the cell, and it is generally said that eukaryotic cells die soon after losing their nucleus, but red blood cells can live for 120 days after losing their nucleus; Plant sieve tube cells, after losing their nucleus, can live for several years.
1.A place where genetic material is stored and reproduced. From the structure of the nucleus, it can be seen that the most important structure in the nucleus is chromatin, and the components of chromatin are protein molecules and DNA molecules, which in turn are the main genetic material.
When genetic material is passed on to offspring, it must be replicated in the nucleus. So, the nucleus is where genetic material is stored and replicated.
2.The control center of cytogenetic and cellular metabolic activity. Genetic material can be passed on to offspring after replication, and the genetic material must also express the characteristics of the biological traits it controls, and the vast majority of these genetic material is present in the nucleus.
Therefore, the nucleus is the control center of cell heritability and cellular metabolic activity. For example, the British cloned sheep "Dolly" is to remove the nucleus of a ewe egg cell, and then, in this enucleated egg cell, transplant into the nucleus of another ewe mammary cell, and finally develop from this egg cell. Dolly has the same genetic traits as the ewes that provide the nucleus.
This example fully illustrates the important role of the nucleus in controlling the hereditary and metabolic activities of the cell.
Therefore, a more comprehensive description of the function of the nucleus should be: the nucleus is a repository of genetic information and the control center of cell metabolism and heredity.
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Yes. Ribonucleic acid, abbreviated as RNA, is a carrier of genetic information found in biological cells and some viruses and viroids. RNA is made up of ribonucleotides condensed by phosphodiester bonds to grow into chains. A ribonucleotide molecule is made up of phosphoric acid, ribose sugar, and bases.
RNA is made up of ribonucleotides condensed by phosphodiester bonds to grow into chains. RNA is a single strand formed by transcription based on the principle of base complementarity and pairing, and its main function is to realize the expression of genetic information on proteins, and is a bridge in the process of transformation of genetic information to phenotype. In this process, the transfer RNA carries the amino acid residues corresponding to the triplet codon and binds to the mRNA undergoing translation, and then the ribosomal RNA connects the individual amino acid residues into peptide chains through peptide bonds to form protein molecules.
RNA is made up of ribonucleotides condensed by phosphoester bonds to form a long chain molecule. A ribose huliang wide nucleotide molecule is made up of phosphoric acid, ribose sugar, and bases. There are 4 main bases of RNA, namely A adenine, G guanine, C cytosine, and Uracil.
Among them, Uuracil replaces T thymine in DNA and becomes the characteristic base of RNA.
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DNA is mainly distributed in the nucleus, in addition to a small amount of mitochondria and chloroplasts in the cytoplasm, there is also a small amount of DNA in the nucleolus of the cell to make laughing nucleus, and RNA is ribonucleic acid.
Deoxyribonucleic acid, abbreviated as DNA, is one of the four biological macromolecules contained in biological cells. DNA carries the genetic information necessary for the synthesis of RNA and proteins, and is an essential biological macromolecule for the development and proper functioning of organisms.
Ribonucleic acid, abbreviated as RNA, is a carrier of genetic information found in biological cells and some viruses and viroids. RNA is made up of ribonucleotides condensed by phosphodiester bonds to grow into chains.
Due to the differences in chemical composition and molecular structure between DNA and RNA, they react differently to different dyes. Therefore, according to this difference in response, the distribution of DNA and RNA in cells can be studied, with DNA mainly distributed in the nucleus and RNA mainly distributed in the cytoplasm.
Both nucleic acid molecules, DNA and RNA, are multimers, but they differ in the degree of polymerization. The degree of DNA polymerization is high, and it is easy to bind methyl green; The degree of RNA polymerization is low, and it is easy to bind to pyroxinant. Therefore, when pyroxin is mixed with methyl green as a dye, pyroxin selectively binds to RNA in nucleolus and cytoplasm, thus showing red; Methyl green selectively binds to DNA in chromatin, thus showing green color.
In summary, RNA has a strong affinity for pyroxain and is dyed red; DNA has a strong affinity for methyl green and is dyed green or hu.
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In eukaryotes:
DNA is mainly distributed in the nucleus, mitochondria (mitochondrial DNA), chloroplasts (chloroplast DNA in plants). RNA is mainly distributed in the cytoplasmic matrix (mRNA, tRNA), ribosomes (RRNA), and some RNA is also found in the nucleus.
In prokaryotic cells:
DNA is mainly distributed in nucleoids, but plasmids (small circular DNA in the cytoplasm) also contain plasmids (mRNA, tRNA) and ribosomes (RRNA) that are mainly distributed in the cytoplasmic matrix.
If there is any omission, please feel free to ask.
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Eukaryotic cells: DNA is mainly in the nucleus and RNA is mostly in the cytoplasm.
Prokaryotic cells: DNA in nucleoid, RNA in nucleus.
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In animal and plant cells, there is both DNA and RNA in the nucleus, mitochondria, and chloroplasts, as well as RNA in the cytoplasm and ribosomes
The nucleoid region in the prokaryotic cell has a large nucleic acid which is DNA, and the plasmid in the cytoplasm is a small DNA loop with RNA in the plasma
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Experiment with the distribution of 3D DNA and RNA in cells.
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Answer]: mRNA only accounts for 3% of the total RNA in the cell 5% There are two reasons: first, due to the large amount of ribosomal RNA and its need for a constant tRNA pool, mRNA synthesis is less than that of other RNAs; Second, due to autodegradation by endonucleases or exonucleases, mRNA has a very short half-life (prokaryotic 2 15 min) and eukaryotic medium (4 24 h).
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No, DNA is mainly distributed in the nucleus.
RNA seems to be distributed in the nucleus (transcription of DNA), 2, DNA is distributed in large amounts in the nucleus, a small amount in the cytoplasm, RNA is only distributed in the cytoplasm, 2, no! The DNA on the eukaryotic chromosomes is in the nucleus, and there are some DNA stored in the ** chondria (plants, animals, fungi) and chloroplasts (part of the cell of plants, and some plant cells also have no chloroplasts, such as root hair cells) and the prokaryotes have no nucleus at all, only nucleoids, so the prokaryotic DNA exists in the nucleoid! 2. There is also DNA in the cytoplasm, such as mitochondria and chloroplasts, and some cells with phagocytic function or infected by viruses and bacteria also have DNA in the cytoplasm
RNA is transcribed in the nucleus, so there is RNA in the nucleus, and some microRNAs in the nucleus also have the ability to regulate DNA transcription, thereby regulating gene expression, 1, DNA is distributed in the nucleus, mitochondria, and chloroplasts.
RNA is distributed in the nucleus (rRNA, mRNA), mitochondria, chloroplasts, ribosomes, cytoplasm.
For prokaryotes, DNA is distributed in the cytoplasm. RNA is distributed in the cytoplasm and ribosomes. ,1,Of course not pulling There are also a small amount of DNA and RNA in mitochondria and chloroplasts Oh what you say is only the main one,0,DNA is mainly distributed in the nucleus, followed by ** in the chondria, chloroplasts.
RNA is distributed in ribosomes in the cytoplasm. , 0, DNA is distributed in the nucleus, mitochondria, chloroplasts, because mitochondria and chloroplasts are semi-autonomous organelles that can carry out transcriptional translation work independently.
RNA is distributed in the nucleus (rRNA, mRNA), mitochondria, chloroplasts, ribosomes, cytoplasm. ,0,
Absolutely. There are chromosomes in the nucleus, and there is DNA on the chromosomes, and DNA is the genetic material.
There are two main differences.
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Yes, nucleolus.
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