The most prevalent negative charge on DNA deserve to be discovered on i beg your pardon of the complying with molecular components?


Explanation:

The phosphate backbone of DNA is negatively charged because of the binding created in between the phosphorous atoms and the oxygen atoms. Each phosphate group consists of one negatively fee oxygen atom, thus the whole strand of DNA is negatively charged because of repeated phosphate groups. 


Explanation:

Nitrogen is important to produce all the nucleic acids, and phosphorous is important to produce phospholipids (an obvious choice), ATP and ADP (they space the same course of molecule, and also the P represents phosphate), and DNA (for the phosphate-sugar backbone).

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Explanation:

DNA is a polymer composed of nucleotide monomers. Each nucleotide is created from a deoxyribose sugar, a phosphate, and also a nitrogenous base. There are two species of nitrogenous bases: purines and also pyrimidines. The purines room adenine and guanine, while the pyrimidines space thymine and cytosine (and uracil). Adenin will always bind thymine and cytosine will constantly bind guanine. Uracil is only found in RNA, and also is absent from DNA.

During DNA replication and synthesis, nucleotides align so that the nitrogenous bases are appropriately paired. The bases bind to one various other via hydrogen bonding come secure the nucleotide come the design template strand. The protein DNA ligase then fuses the sugar-phosphate teams of nearby nucleotides to create the DNA backbone. This bonds are recognized as phosphodiester bonds.

The only false statement comes to the identity of bonding in between nitrogenous bases. Bases are held together by hydrogen bonds, and the DNA backbone is hosted together through phosphodiester bonds.


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Example inquiry #1 : knowledge The street Phosphate Backbone


A __________ bond in between the sugar of one nucleotide and also the phosphate the an adjacent nucleotide stabilizes the backbone of the DNA. 


Possible Answers:

metallic


covalent


ionic


hydrogen


weak


Correct answer:

covalent


Explanation:

The link formed in between the sugar of one nucleotide and also the phosphate that an adjacent nucleotide is a covalent bond. A covalent shortcut is the share of electrons in between atoms. A covalent bond is stronger than a hydrogen shortcut (hydrogen bonds host pairs the nucleotides together on the opposite strands in DNA). Thus, the covalent link is critical to the backbone the the DNA. 


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Example inquiry #22 : Dna and Rna framework


Which of the adhering to nitrogenous bases is provided to create RNA, however not DNA?


Possible Answers:

Adenine


Thymine


Guanine


Uracil


Correct answer:

Uracil


Explanation:

Uracil is tied to adenin in the production of RNA, when thymine is provided in its location in the production of DNA. Adenine, guanine, and also cytosine are all offered in the manufacturing of both RNA and DNA.


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Example inquiry #21 : Dna and Rna framework


How many full hydrogen bonds would there be in between base bag of a item of DNA if the sequence of one side to be CGTTTGAC?


Possible Answers:

*


*


*


*



Correct answer:


Explanation:

Cytosine and also guanine form three hydrogen bonds between each other, when tyrosine and adenine form two hydrogen bonds. We merely need to counting how countless of each base we have and also multiple cytosine and guanine by three, and also thymine and also adenine through two.

CGTTTGAC has 2 cytosine, 2 guanine, 3 thymine, and also 1 adenine.

*


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Example inquiry #21 : Dna and Rna framework


What element would girlfriend NOT uncover in either DNA, or RNA?


Possible Answers:

Phosphorus


Nitrogen


Hydrogen


Potassium


Carbon


Correct answer:

Potassium


Explanation:

DNA and RNA room made of nucleotides, which contain oxygen, hydrogen, nitrogen, carbon, and also phosphorus. The nucleic mountain backbone is comprised of sugars, made of carbon, hydrogen, and oxygen, and also phosphate groups, do of phosphorus, hydrogen, and also oxygen. The backbone binds to bases, which contain a nitrogen element.

Potassium is not discovered in nucleic mountain structure, and is provided in other parts the the body favor muscles and nerves for signal propagation.


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Example concern #21 : Dna and Rna framework


What space the components of a nucleoside?


Possible Answers:

A ribose or deoxyribose sugar and a phosphate


A nitrogenous base, a ribose or deoxyribose sugar, and also a phosphate group


A nitrogenous base and a ribose or deoxyribose sugar


A nitrogenous base and a phosphate


Correct answer:

A nitrogenous base and also a ribose or deoxyribose sugar


Explanation:

This inquiry is mostly about the differentiations between a nucleoside and a nucleotide. A nucleoside is composed of a nitrogenous base and also a ribose or deoxyribose sugar. A nitrogenous base, a ribose/deoxyribose sugar, and a phosphate explain a nucleotide. Remember the nucleosides are incomplete nucleotides, and lack a phosphate group.


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Example inquiry #21 : Dna and Rna structure


Which the the complying with is a factor that cytosine pairs an ext favorably through guanine than thymine or adenine?


Possible Answers:

Ionic interactions in between the bases


A covalent shortcut is formed


Maximized variety of hydrogen bonds


Bond power is maximized


Correct answer:

Maximized variety of hydrogen bonds


Explanation:

Cytosine and guanine, as soon as base paired, have three hydrogen bonds in between them. Adenine and also thymine only have actually two. This extra hydrogen shortcut helps make the cytosine-guanine pair favorable due to the fact that it boosts stability, and reduces bond energy.

Ionic and also covalent bonds do not occur in between nitrogenous bases in DNA. Covalent binding are found in the DNA backbone (known together phosphodiester bonds).

 


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Example concern #26 : Dna and Rna structure


Chargaff is attributed with i m sorry of the adhering to discoveries about DNA base pairs?


Possible Answers:

The proportion of adenin to thymine is close come  and the proportion of guanine come cytosine is nearby to 


The ratio of adenin to cytosine is close to

*
 and the proportion of guanine to thymine is near to 
*


The ratio of adenin to guanine is nearby to 

*
 and the proportion of cytosine to thymine is nearby to 
*


Correct answer:

The proportion of adenine to thymine is close come  and the ratio of guanine to cytosine is near to 


Explanation:

Due come DNA"s double-helical structure, the nucleotide bases are paired. Adenine is paired through thymine and also guanine is paired v cytosine. Chargaff uncovered that over there is commonly an equivalent variety of adenine and also thymine bases, and an equivalent number of guanine and also cytosine bases. In a offered sample the DNA, all adenine residues will have thymine counterparts top top the safety strand, and also all cytosine residues will have actually complementary guanine counterparts. Together a result, there will certainly be same numbers of each residue the the base pair in any sample that double-stranded DNA.


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