Which of the following statements about rna is true
Which of the following statement is true about RNA?
It contains adenine paired to thymine.
What are 5 facts about RNA?
There are several types of RNA, including transfer RNA (tRNA), messenger RNA (mRNA), and ribosomal RNA (rRNA). RNA performs many functions in an organism, such as coding, decoding, regulating, and expressing genes. About 5% of the weight of a human cell is RNA. Only about 1% of a cell consists of DNA.
Is RNA shorter than DNA?
In addition, because they are copied from only a limited region of the DNA, RNA molecules are much shorter than DNA molecules. A DNA molecule in a human chromosome can be up to 250 million nucleotide-pairs long; in contrast, most RNAs are no more than a few thousand nucleotides long, and many are considerably shorter.
Does RNA contain Deoxyribose?
Unlike DNA, RNA is usually single-stranded. Additionally, RNA contains ribose sugars rather than deoxyribose sugars, which makes RNA more unstable and more prone to degradation. RNA is synthesized from DNA by an enzyme known as RNA polymerase during a process called transcription.
What is unique about RNA?
RNA is a unique polymer. … It can also bind specific proteins or small molecules, and, remarkably, RNA can catalyze chemical reactions, including joining amino acids to make proteins. All the RNA in cells are themselves copies of DNA sequences contained in the genes of a cell’s chromosomes.
What are characteristics of RNA?
RNA consists of ribose nucleotides (nitrogenous bases appended to a ribose sugar) attached by phosphodiester bonds, forming strands of varying lengths. The nitrogenous bases in RNA are adenine, guanine, cytosine, and uracil, which replaces thymine in DNA.
Which of the following statements is not true about RNA *?
Unlike DNA, RNA is not a double-helical structure. RNA is never meant to live long. It has the same template as that of the DNA which is further taken to the ribosomes where the protein transcription is exchanged. RNA is the template of DNA that can be used and then disintegrated.
How does RNA differ from DNA quizlet?
RNA is different from DNA is three ways: (1) the sugar in RNA is ribose not dioxyribose; (2) RNA is generally single-stranded and not double-stranded; and (3) RNA contains uracil in place of thymine. … The DNA stays safely in the nucleus, while the RNA goes to the protein-building sites in the cytoplasm — the ribosomes.
What is true for DNA but not for RNA?
Where DNA has thymine, RNA has uracil. So the structural component that is found in DNA but not in RNA is thymine. Deoxyribose sugar, too.
Which of the following statement is false about RNA polymerase?
The RNA polymerase is going to enter the gene through the promoter option. Business, it synthesizes marinating a 3 to 5 direction within the DNA strand 5 to 3. And this is false.
Which of the following is not about RNA?
Uracil is present in the RNA whereas in the DNA we see thymine instead of Uracil. Thus thymine is absent from the RNA. Hence the correct option is option B, Thymine. of a cell consists of DNA.
Which of the following statements is not true about the structure of DNA?
The correct option: The structure which is not true for a DNA molecule is B. Single-stranded. The structure of a DNA molecule is formed with the…
Which is true about prokaryotic bacterial RNA polymerase?
Which is true about prokaryotic (bacterial) RNA polymerase? It is used during transcription. It does not require a primer. It has a detachable subunit, sigma factor, which recognizes the promoter.
Which of the following is correct about RNA in eukaryotes?
Exons appear, but introns do not appear in the mature RNA is correct about mature RNA in eukaryotes.
Which of the following statement is incorrect about SnRNA?
9. Which of the following statement is Incorrect about SnRNA? Explanation: SnRNA is small nuclear RNA mainly found in the nucleus of eukaryotic cells. It takes part in RNA splicing and always remain associated with other proteins and referred to as snurps or snRNP.
What is true about RNA polymerase?
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
Which is true of bacterial plasmids?
A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell’s chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes. Often, the genes carried in plasmids provide bacteria with genetic advantages, such as antibiotic resistance.
Which of the following statements is true regarding transcription and translation?
The statement regarding transcription and translation that is true is A: During transcription, an mRNA molecule is created from the DNA molecule.
What is true about DNA replication?
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
What is true about nucleotides?
Which is true of nucleotides? They are the building blocks of DNA. They carry chemical energy in their bonds.
What is the role of RNA polymerase in transcription quizlet?
What is RNA polymerase? an enzyme that binds to DNA during transcription and separates or unwinds the DNA strands.