The most prevalent an adverse charge ~ above DNA have the right to be found on which of the adhering to molecular components?


Explanation:

The phosphate backbone that DNA is negatively charged due to the binding created in between the phosphorous atoms and the oxygen atoms. Every phosphate group has one negatively charged oxygen atom, thus the entire strand that DNA is negative charged because of repeated phosphate groups. 


Explanation:

Nitrogen is essential to develop all the main point acids, and also phosphorous is necessary to develop phospholipids (an noticeable choice), ATP and ADP (they room the same course of molecule, and the P means phosphate), and DNA (for the phosphate-sugar backbone).

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Explanation:

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

During DNA replication and also synthesis, nucleotides align so that the nitrogenous bases are properly paired. The bases bind to one various other via hydrogen bonding come secure the nucleotide to the theme strand. The protein DNA ligase then fuses the sugar-phosphate teams of adjacent nucleotides to produce the DNA backbone. This bonds are known as phosphodiester bonds.

The just false statement concerns the identity of bonding in between nitrogenous bases. Bases are organized together by hydrogen bonds, and also the DNA backbone is held together by phosphodiester bonds.


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Example concern #4 : expertise The street Phosphate Backbone


A __________ bond in between the street of one nucleotide and the phosphate that an surrounding nucleotide stabilizes the backbone of the DNA. 


Possible Answers:

ionic


metallic


weak


covalent


hydrogen


Correct answer:

covalent


Explanation:

The link formed between the street of one nucleotide and also the phosphate of an nearby nucleotide is a covalent bond. A covalent bond is the sharing of electrons between atoms. A covalent shortcut is more powerful than a hydrogen link (hydrogen bonds hold pairs that nucleotides together on the opposite strands in DNA). Thus, the covalent shortcut is an important to the backbone the the DNA. 


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Example concern #1 : knowledge Nucleotides and also Base pairs


Which of the complying with nitrogenous bases is offered to produce RNA, but not DNA?


Possible Answers:

Uracil


Thymine


Adenine


Guanine


Correct answer:

Uracil


Explanation:

Uracil is tied to adenin in the production of RNA, when thymine is offered in its ar in the production of DNA. Adenine, guanine, and cytosine space all supplied in the production of both RNA and DNA.


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Example inquiry #21 : Dna and also Rna structure


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


Possible Answers:

*


*



*


*


Correct answer:


Explanation:

Cytosine and guanine type three hydrogen bonds between each other, while tyrosine and also adenine type two hydrogen bonds. We simply need to count how plenty of of every base we have and multiple cytosine and also guanine through three, and thymine and also adenine by two.

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

*


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Example concern #3 : understanding Nucleotides and Base pairs


What aspect would friend NOT discover in one of two people DNA, or RNA?


Possible Answers:

Hydrogen


Carbon


Potassium


Phosphorus


Nitrogen


Correct answer:

Potassium


Explanation:

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

Potassium is not uncovered in nucleic mountain structure, and is supplied in other parts the the body prefer muscles and also nerves because that signal propagation.


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Example concern #4 : expertise Nucleotides and Base pairs


What space the components of a nucleoside?


Possible Answers:

A nitrogenous base and a phosphate


A ribose or deoxyribose sugar and also a phosphate


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


A nitrogenous base and also a ribose or deoxyribose sugar


Correct answer:

A nitrogenous base and a ribose or deoxyribose sugar


Explanation:

This concern is mostly about the differentiations between a nucleoside and also 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 describe a nucleotide. Remember that nucleosides space incomplete nucleotides, and lack a phosphate group.


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Example inquiry #22 : Dna and also Rna structure


Which the the adhering to is a reason that cytosine pairs much more favorably with guanine than thymine or adenine?


Possible Answers:

A covalent shortcut is formed


Maximized number of hydrogen bonds


Bond energy is maximized


Ionic interactions between the bases


Correct answer:

Maximized number of hydrogen bonds


Explanation:

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

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

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Example inquiry #6 : understanding Nucleotides and Base pairs


Chargaff is attributed with which of the adhering to discoveries around DNA base pairs?


Possible Answers:

The proportion of adenin to guanine is close to 

*
 and the ratio of cytosine to thymine is near to 
*


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


The proportion of adenine to cytosine is close come

*
 and the ratio of guanine come thymine is nearby to 
*


Correct answer:

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


Explanation:

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


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