Explanation:

DNA and RNA share numerous characteristics. They room both created of nucleotide monomers and are review in the 5"-to-3" direction. They also share the same complementary base pairs, except RNA provides uracil in location of thymine; both contain adenine.

You are watching: Which of the following is not true regarding the structure of rna?

RNA does not current in a twin helix structure, and is typically solitary stranded.


A ar of mRNA is written of 28% guanine bases. What portion of the RNA strand is cytosine bases?


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Explanation:

Remember the mRNA is no a double helix choose DNA; RNA is just one single strand the nucleotides. This method that we are unable to say that there are simply as many cytosine bases together guanine bases, also though they would be maybe to kind nucleotide bag in DNA. Because that all us know, there can be zero cytosine bases! more information is needed before we have the right to make a conclusion as to how countless cytosine bases space in the RNA section.


Correct answer:

The sugar molecule in RNA has one more hydroxyl group than the sugar molecule in DNA


Explanation:

The only correct statement right here is the one regarding the types of sugar in the two molecules. RNA represents "ribonucleic acid," i beg your pardon is a simple means to remember the it consists of the sugar ribose. DNA, top top the various other hand, means "deoxyribonucleic acid." Its sugar is deoxyribose, i m sorry is identical to ribose except it is absent a hydroxyl (-OH) group on its second carbon. In total, RNA includes three hydroxyl groups, when DNA includes only two.

In RNA, uracil replace instead instead thymine, not guanine. DNA is normally double-stranded and RNA is normally single-stranded (though both have the right to exist in either form). Prokaryotes contain both DNA and RNA. Finally, DNA is transcribed to RNA in most organic organisms, however RNA deserve to be turning back transcribed to DNA by the protein turning back transcriptase, which is discovered in part viruses.


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Example inquiry #1 : Dna and also Rna structure


Which that the complying with statements is false?


Possible Answers:

DNA provides thymine, when RNA offers uracil


DNA is commonly double-stranded, if RNA is generally single-stranded


DNA and also RNA utilize different sugars in their sugar-phosphate backbones


DNA is a polyanion, if RNA is a not


Correct answer:

DNA is a polyanion, when RNA is a not


Explanation:

Both DNA and RNA space polyanions. This is simply a fancy means of saying the they room polymers the negatively charged molecules. The phosphate teams in the sugar-phosphate backbone account because that this, as phosphate teams generally lug a charge of negative three.

DNA uses thymine and also deoxyribose sugar, if RNA offers uracil and also ribose sugar. When DNA is commonly molded right into a double-stranded helix, RNA is generally single-stranded, which permits for the binding that anticodons during translation.


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Example question #1 : Dna and Rna framework


Which of the following is properties of RNA?


Possible Answers:

RNA has a hydroxyl group on the 2’ carbon that ribose


RNA is commonly double-stranded


RNA is a long-term molecule in most cells


RNA is less stable than DNA


Correct answer:

RNA has actually a hydroxyl group on the 2’ carbon the ribose


Explanation:

RNA and DNA are very similar in composition, yet differ in structure and function. DNA is provided to password for hereditary material, when RNA is offered to generate protein products. Because DNA has actually a long-term goal of save information and RNA has a momentary goal of increasing production, it makes sense that DNA is a permanent molecule and RNA is transient. Quickly after translation, mRNA is degraded by ribonuclease (RNase). The transient nature that RNA is additionally linked to its stability. DNA should be an extremely stable to avoid problems with gene storage. DNA is double-stranded to help enhance stability. In contrast, RNA can afford to be less stable and also is conveniently degraded, partially because of its single-stranded structure.

Another vital difference between DNA and RNA is the sugar component of the nucleic mountain backbone. DNA provides deoxyribose, i beg your pardon lacks a hydroxyl (-OH) team on the 2" carbon. RNA uses ribose, in which this hydroxyl group is current on the 2" carbon.


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Example question #1 : Dna and also Rna structure


Which that the adhering to is no a true characteristic of an RNA molecule?


Possible Answers:

It consists of deoxyribose sugar


It deserve to be twin stranded


It can be solitary stranded


It consists of the nucleotide uracil


Correct answer:

It contains deoxyribose sugar


Explanation:

RNA molecules are most frequently found in a single stranded kind (e.g. MRNA), yet they can also be found in a double stranded type (e.g. Viruses). The has 4 base pairs—uracil, adenine, guanine, and cytosine—and a ribose sugar-phosphate backbone. DNA molecule contin a deoxyribose sugar in your sugar-phosphate backbone; thus, this answer is incorrect.


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Example inquiry #1 : knowledge Differences between Dna and also Rna


Which that the following types of RNA is dual stranded?


Possible Answers:

rRNA


Viral RNA


mRNA


tRNA


Correct answer:

Viral RNA


Explanation:

Many types of RNA exist in ~ cells, some are single stranded and others are dual stranded. The following are amongst the types of solitary stranded RNA: mRNA (messenger RNA), tRNA (transfer RNA), and rRNA (ribosomal RNA). Messenger or mRNA carries genetic information from DNA come ribosomes for protein synthesis. Move or tRNA carries amino acids to ribosom that match v mRNA codons. Last, ribosomal or rRNA codes because that ribosomes, i beg your pardon are vital for protein synthesis. An instance of a double stranded RNA molecule is viral RNA. Famous RNA is the hereditary material of plenty of viruses and also has a structure of 2 complementary strands.

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Example concern #1 : Dna and Rna framework


Which the the following options is an facet common come both DNA and also RNA molecules?


Possible Answers:

There is deoxyribose street in both of your sugar-phosphate backbones


They can both be uncovered in the nucleus


Both save the nucleotide uracil


Both are often single-stranded


Correct answer:

They have the right to both be uncovered in the nucleus


Explanation:

DNA is a macromolecule that has a double helical form. The has 4 nitrogenous basic pairs (thymine, adenine, cytosine, and guanine) and a deoxyribose-phosphate backbone. The 2 strands that the helix room joined by hydrogen bonds. On the various other hand, RNA molecules can be double-stranded (e.g. Viruses) or single-stranded (e.g. MRNA), but RNA most commonly exists in a single-stranded form. RNA has four basic pairs (uracil, adenine, cytosine, and guanine) and also a ribose sugar-phosphate backbone. In spite of their differences, these molecules re-publishing one similarity: both DNA and RNA molecules have the right to be found in the nucleus. DNA molecule reside exclusively within the nucleus. RNA is spelling in the cell nucleus and, as soon as targeted and also post-transcriptionally modified, can leave via nuclear pores.


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Example concern #2 : Dna and also Rna structure


Which of the following are correct regarding the main dogma that biology?


Possible Answers:

DNA directs the synthetic of mRNA, which subsequently directs the manufacturing of polypeptides


RNA assists through the replication that DNA which encodes information for proteins


RNA encodes the details for the assembly of ribosomes, which are the web page of protein production


RNA signal DNA come activate protein production


Correct answer:

DNA directs the synthetic of mRNA, which subsequently directs the production of polypeptides


Explanation:

DNA encodes details for the production of messenger RNA which then interacts with the cell"s protein-synthesizing machine to develop proteins. Ribosomes space the sites of polypeptide synthesis yet are no coded because that by RNA. The central dogma of biology is DNA 

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 RNA 
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 protein


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Example concern #1 : knowledge Differences in between Dna and Rna


Which of the complying with are properties of RNA?


Possible Answers:

Ribose, thymine, and also a straight structure


Ribose, uracil, and a straight structure


Deoxyribose, thymine, and a straight structure


Deoxyribose, ribose, and uracil


Deoxyribose, uracil, and a globular structure


Correct answer:

Ribose, uracil, and a straight structure


Explanation:

Remember that the sugar for DNA is deoxyribose, and that because that RNA is ribose. The nitrogenous bases adenine, guanine, and also cytosine in DNA and RNA are the same. However, DNA which consists of thymine and RNA that includes uracil. The structure of DNA is a twin helix. There room three different structures that RNA: linear, clover-leaf, and also globular. Likewise note the RNA is single stranded and DNA is double stranded


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