The many prevalent negative charge ~ above DNA can be found on i beg your pardon of the following molecular components?


Explanation:

The phosphate backbone the DNA is negative charged because of the bond created in between the phosphorous atoms and the oxygen atoms. Every phosphate group includes one negatively fee oxygen atom, therefore the entire strand of DNA is negative charged due to repeated phosphate groups. 


Explanation:

Nitrogen is necessary to create all the main point acids, and phosphorous is essential to create phospholipids (an evident choice), ATP and ADP (they space the same course of molecule, and the P stands for phosphate), and DNA (for the phosphate-sugar backbone).

You are watching: How many bonds between adenine and thymine


Explanation:

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

During DNA replication and synthesis, nucleotides align so the the nitrogenous bases are properly paired. The bases tie to one various other via hydrogen bonding come secure the nucleotide come the layout strand. The protein DNA ligase climate fuses the sugar-phosphate groups of adjacent nucleotides to create the DNA backbone. These bonds are well-known as phosphodiester bonds.

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


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Example inquiry #4 : understanding The street Phosphate Backbone


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


Possible Answers:

ionic


metallic


weak


covalent


hydrogen


Correct answer:

covalent


Explanation:

The bond formed in between the street of one nucleotide and also the phosphate of an nearby nucleotide is a covalent bond. A covalent link is the sharing of electrons between atoms. A covalent shortcut is stronger than a hydrogen link (hydrogen bonds host pairs of nucleotides with each other on the contrary strands in DNA). Thus, the covalent link is an essential to the backbone the the DNA. 


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Example question #1 : knowledge Nucleotides and also Base pairs


Which that the complying with nitrogenous bases is provided to develop RNA, but not DNA?


Possible Answers:

Uracil


Thymine


Adenine


Guanine


Correct answer:

Uracil


Explanation:

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


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Example inquiry #2 : understanding Nucleotides and also Base bag


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


Possible Answers:

*



*


*


*


Correct answer:


Explanation:

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

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

*


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Example question #3 : understanding Nucleotides and also Base pairs


What facet would girlfriend NOT uncover in one of two people DNA, or RNA?


Possible Answers:

Hydrogen


Carbon


Potassium


Phosphorus


Nitrogen


Correct answer:

Potassium


Explanation:

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

Potassium is not uncovered in nucleic acid structure, and is offered in other parts the the body choose muscles and nerves for signal propagation.


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Example concern #4 : expertise Nucleotides and also Base pairs


What are the contents of a nucleoside?


Possible Answers:

A nitrogenous base and a phosphate


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


Correct answer:

A nitrogenous base and a ribose or deoxyribose sugar


Explanation:

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


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Example concern #5 : expertise Nucleotides and Base bag


Which of the adhering to is a reason that cytosine pairs an ext favorably through guanine 보다 thymine or adenine?


Possible Answers:

Ionic interactions between the bases


A covalent bond is formed


Maximized variety of hydrogen bonds


Bond energy is maximized


Correct answer:

Maximized number of hydrogen bonds


Explanation:

Cytosine and guanine, as soon as base paired, have actually three hydrogen bonds in between them. Adenine and thymine only have two. This extra hydrogen link helps make the cytosine-guanine pair favorable since it increases stability, and reduces link energy.

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

 


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Example question #6 : understanding Nucleotides and Base bag


Chargaff is credited with which of the following discoveries about DNA base pairs?


Possible Answers:

The ratio of adenin to guanine is nearby to 

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


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


The ratio of adenin to cytosine is close come

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


Correct answer:

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


Explanation:

Due to DNA"s double-helical structure, the nucleotide bases are paired. Adenine is paired through thymine and guanine is paired through cytosine. Chargaff found that over there is typically an equivalent variety of adenine and also thymine bases, and also an equivalent number of guanine and also cytosine bases. In a provided sample that DNA, all adenin residues will have actually thymine counterparts on the complementary strand, and also all cytosine residual water will have actually complementary guanine counterparts. As a result, there will be equal numbers of each residue of the base pair in any sample the double-stranded DNA.


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