Explanation:

DNA and RNA share many kind of qualities. They are both created of nucleotide monomers and are check out in the 5"-to-3" direction. They also share the exact same complementary base pairs, other than RNA uses uracil in place of thymine; both contain adenine.

You are watching: Which structural characteristic is seen in rna but not in dna?

RNA does not current in a dual helix structure, and is typically single stranded.


A area of mRNA is composed of 28% guanine bases. What portion of the RNA strand also is cytosine bases?


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Explanation:

Remember that mRNA is not a dual helix like DNA; RNA is only one single strand also of nucleotides. This implies that we are unable to say that tright here are just as many type of cytosine bases as guanine bases, even though they would certainly be able to form nucleotide pairs in DNA. For all we recognize, tbelow can be zero cytosine bases! More indevelopment is required before we can make a conclusion as to just how many type of cytosine bases are in the RNA section.


Correct answer:

The sugar molecule in RNA has an additional hydroxyl group than the sugar molecule in DNA


Explanation:

The just correct statement here is the one regarding the types of sugar in the two molecules. RNA means "ribonucleic acid," which is a straightforward way to remember that it consists of the sugar ribose. DNA, on the various other hand also, means "deoxyribonucleic acid." Its sugar is deoxyribose, which is the same to ribose except it is lacking a hydroxyl (-OH) group on its second carbon. In full, RNA consists of 3 hydroxyl groups, while DNA consists of only 2.

In RNA, uracil replaces thymine, not guanine. DNA is primarily double-stranded and also RNA is generally single-stranded (though both can exist in either form). Prokaryotes contain both DNA and RNA. Finally, DNA is transcribed to RNA in a lot of biological organisms, but RNA deserve to be reverse transcribed to DNA by the protein reverse transcriptase, which is discovered in some virsupplies.


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Example Question #1 : Dna And Rna Structure


Which of the adhering to statements is false?


Possible Answers:

DNA is a polyanion, while RNA is a not


DNA offers thymine, while RNA provides uracil


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


DNA is frequently double-stranded, while RNA is generally single-stranded


Correct answer:

DNA is a polyanion, while RNA is a not


Explanation:

Both DNA and RNA are polyanions. This is simply a sophisticated method of saying that they are polymers of negatively charged molecules. The phosphate groups in the sugar-phosphate backbone account for this, as phosphate groups mainly bring a charge of negative three.

DNA uses thymine and deoxyribose sugar, while RNA provides uracil and ribose sugar. While DNA is commonly molded right into a double-stranded helix, RNA is commonly single-stranded, which allows for the binding of anticodons during translation.


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Example Question #5 : Dna And Rna Structure


Which of the following is characteristic of RNA?


Possible Answers:

RNA is frequently double-stranded


RNA is a long-term molecule in a lot of cells


RNA is much less secure than DNA


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


Correct answer:

RNA has a hydroxyl team on the 2’ carbon of ribose


Explanation:

RNA and DNA are incredibly comparable in complace, yet differ in framework and feature. DNA is used to code for hereditary product, while RNA is supplied to geneprice protein products. Due to the fact that DNA has a irreversible goal of storing information and also RNA has actually a short-term goal of raising production, it provides feeling that DNA is a permanent molecule and also RNA is transient. Soon after translation, mRNA is degraded by ribonuclease (RNase). The transient nature of RNA is likewise linked to its stcapacity. DNA have to be exceptionally steady to protect against troubles through gene storage. DNA is double-stranded to assist boost stability. In comparison, RNA have the right to afford to be much less stable and is easily degraded, partially because of its single-stranded structure.

Another essential difference in between DNA and also RNA is the sugar component of the nucleic acid backbone. DNA supplies deoxyribose, which lacks a hydroxyl (-OH) group on the 2" carbon. RNA offers ribose, in which this hydroxyl team is current on the 2" carbon.


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Example Question #6 : Dna And Rna Structure


Which of the adhering to is not a true characteristic of an RNA molecule?


Possible Answers:

It can be double stranded


It have the right to be single stranded


It includes deoxyribose sugar


It includes the nucleotide uracil


Correct answer:

It includes deoxyribose sugar


Explanation:

RNA molecules are a lot of commonly found in a single stranded create (e.g. mRNA), yet they can likewise be found in a double stranded form (e.g. viruses). It has 4 base pairs—uracil, adenine, guanine, and cytosine—and also a ribose sugar-phosphate backbone. DNA molecules contin a deoxyribose sugar in their sugar-phosphate backbone; for this reason, this answer is incorrect.


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Example Question #7 : Dna And Rna Structure


Which of the complying with forms of RNA is double stranded?


Possible Answers:

tRNA


mRNA


rRNA


Viral RNA


Correct answer:

Viral RNA


Explanation:

Many kind of types of RNA exist within cells, some are single stranded and others are double stranded. The following are among the forms of single stranded RNA: mRNA (messenger RNA), tRNA (transfer RNA), and rRNA (ribosomal RNA). Messenger or mRNA carries genetic indevelopment from DNA to ribosomes for protein synthesis. Transfer or tRNA carries amino acids to ribosomes that complement through mRNA codons. Last, ribosomal or rRNA codes for ribosomes, which are important for protein synthesis. An instance of a twin stranded RNA molecule is viral RNA. Viral RNA is the hereditary material of many kind of virsupplies and also has a structure of two complementary strands.


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Example Question #8 : Dna And Rna Structure


Which of the adhering to options is an aspect prevalent to both DNA and RNA molecules?


Possible Answers:

Both are often single-stranded


They can both be found in the nucleus


There is deoxyribose sugar in both of their sugar-phosphate backbones


Both contain the nucleotide uracil


Correct answer:

They have the right to both be discovered in the nucleus


Explanation:

DNA is a macromolecule that has a twin helical create. It has actually 4 nitrogenous base pairs (thymine, adenine, cytosine, and guanine) and a deoxyribose-phosphate backbone. The 2 strands of the helix are joined by hydrogen bonds. On the various other hand also, RNA molecules have the right to be double-stranded (e.g. viruses) or single-stranded (e.g. mRNA), however RNA a lot of commonly exists in a single-stranded form. RNA has four base pairs (uracil, adenine, cytosine, and guanine) and a ribose sugar-phosphate backbone. Despite their distinctions, these molecules share one similarity: both DNA and also RNA molecules deserve to be uncovered in the nucleus. DNA molecules reside exclusively within the nucleus. RNA is transcribed in the nucleus and, as soon as targeted and also post-transcriptionally modified, can leave by means of nuclear pores.


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Example Question #9 : Dna And Rna Structure


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


Possible Answers:

RNA signals DNA to activate protein production


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


RNA encodes the indevelopment for the assembly of ribosomes, which are the sites of protein production


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


Correct answer:

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


Explanation:

DNA encodes indevelopment for the manufacturing of messenger RNA which then interacts via the cell"s protein-manufacturing machinery to develop proteins. Ribosomes are the sites of polypeptide synthesis yet are not coded for by RNA. The central dogma of biology is DNA 

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 RNA 
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 protein


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Example Inquiry #10 : Dna And Rna Structure


Which of the adhering to are properties of RNA?


Possible Answers:

Deoxyribose, uracil, and also a globular structure


Deoxyribose, thymine, and a linear structure


Deoxyribose, ribose, and uracil


Ribose, uracil, and also a straight structure


Ribose, thymine, and also a linear structure


Correct answer:

Ribose, uracil, and also a direct structure


Explanation:

Remember that the sugar for DNA is deoxyribose, and also that for RNA is ribose. The nitrogenous bases adenine, guanine, and cytosine in DNA and also RNA are the very same. However, DNA which consists of thymine and also RNA that includes uracil. The structure of DNA is a double helix. Tbelow are 3 various structures of RNA: direct, clover-leaf, and globular. Also note that RNA is single stranded and DNA is double stranded


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