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Yes, DNA is necessary for all cells, because it holds the genetic information that the cell needs.
However, some viruses store their information in RNA. Viruses are not large and complicated enough to be classed as cells.
Some scientists believe that RNA was the first substance to store genetic information, and that DNA evolved later.
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoIn order for something to be considered living it needs DNA. DNA, or deoxyribose nulceotide, is a neulic acid that is the blueprint for mRNA, messenger RNA, which codes for amino acids. The expression or coding of these amino acids is known as gene expression. Genes don't just give you physical appearence, they controll everything. If cells did not have DNA they would just just exist as a sac of organelles that dont carry out their jobs.
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Why is an replication of DNA essential in al cells?
DNA replication is necessary as cells constantly divide.
Why are genes longer than the mRNA that is translated?
Eukaryotic genes contain all the information required to make the all proteins that all the cells in the organism will need. However, mRNA in cells only copies the region of DNA (gene) that is necessary for that cell. Hence, selectively copying DNA, leaving out junk DNA, the introns, and only copying necessary regions of the DNA, the exons. Further explanation: In DNA, there are many genes (segments of DNA). Some of these genes may be useful while others may not be useful. For example, for a cell found in the mouth, the gene that codes for insulin is not necessary, but the gene that codes for amylase is necessary. As the DNA in all of our cells are the same, this results in unnecessary genes known as introns. These introns will not be copied by the mRNA. Only the exons (necessary genes) will be copied. Thus resulting in a shorter mRNA as compared to DNA.
What statement is correct regarding the cells and DNA?
all the cells have identical DNA
Is there a cell in humans that don't have DNA?
No. Not all cells have a nucleus, which contains nuclear DNA; but all cells have mitochondria, which have their own DNA, called mitochondrial DNA, or mDNA. In humans, the cells that lack a nucleus and therefore nuclear DNA, are mature red blood cells, but they do have mitochondria and mitochondrial DNA.
What are DNA cells made of?
DNA is not a cell type. DNA (deoxyribonucleic acid) is inside of almost all cells, in the nucleus. It holds the genetic information for the cell.
When does the cell need to copy the DNA-?
DNA ultimately controls all the cell's functions, so it is necessary to have it in all your cells. Every time your cells divide so that you can grow or repair your body, the DNA needs to duplicate so that it can be in each of your cells.
Why is an replication of DNA essential in al cells?
DNA replication is necessary as cells constantly divide.
Would you expect to find DNA in all cells and tissue?
Yes, all cells contain DNA because it is necessary for life. DNA codes the RNA which makes the proteins that determine essentially ever characteristic of an organism and the parts of the cell. Tissues are made of cells, so the individual cells contain DNA. Note: in prokaryotic cells, the DNA is not contained in the nucleus, but they DO have DNA, it just floats around freely in the cytoplasm.
Why is it necessary the cell copies its DNA?
cells must copy their DNA to replicate
How do haploid cells differ from diploid cells?
Haploid cells only have half the necessary amount of DNA (sex cells). Diploid cells have a full set of DNA (body cells).
Do plants cells contain DNA why or why not?
Yes, plant cells contain DNA. They contain it because DNA is necessary to the cells so that they can carry the instructions to carry out life functions and reproduce.Nucleus and chloroplasts
Why are genes longer than the mRNA that is translated?
Eukaryotic genes contain all the information required to make the all proteins that all the cells in the organism will need. However, mRNA in cells only copies the region of DNA (gene) that is necessary for that cell. Hence, selectively copying DNA, leaving out junk DNA, the introns, and only copying necessary regions of the DNA, the exons. Further explanation: In DNA, there are many genes (segments of DNA). Some of these genes may be useful while others may not be useful. For example, for a cell found in the mouth, the gene that codes for insulin is not necessary, but the gene that codes for amylase is necessary. As the DNA in all of our cells are the same, this results in unnecessary genes known as introns. These introns will not be copied by the mRNA. Only the exons (necessary genes) will be copied. Thus resulting in a shorter mRNA as compared to DNA.
What statement is correct regarding the cells and DNA?
all the cells have identical DNA
What types of cells contain RNA and DNA?
Genetic cells
Which cells have DNA as their genetic material?
Haploid cells like sperm cells,ova,bacteria
Why is the nucleus necessary?
The nucleus is necessary because it is the control center of the cell. It contains the hereditary information (DNA) and because of that it controls the reproduction of the cell as well. Not all cells have a nucleus. Cells without a nucleus are called Prokaryotes and they are all unicellular. i hope this was helpful!
Is there DNA in a cell?
No cells are not part of DNA. nucleotide bases make up DNA.
