The many prevalent an adverse charge top top DNA deserve to be found on which of the following molecular components?


Explanation:

The phosphate backbone of DNA is negatively charged because of the bonds created between the phosphorous atoms and also the oxygen atoms. Each phosphate group includes one negatively fee oxygen atom, therefore the entire strand that DNA is negatively charged because of repeated phosphate groups. 


Explanation:

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

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Explanation:

DNA is a polymer written of nucleotide monomers. Every nucleotide is developed from a deoxyribose sugar, a phosphate, and a nitrogenous base. There room two types of nitrogenous bases: purines and also pyrimidines. The purines are adenine and guanine, while the pyrimidines are thymine and cytosine (and uracil). Adenine will constantly bind thymine and cytosine will always bind guanine. Uracil is only discovered in RNA, and is absent from DNA.

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

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


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Example inquiry #4 : knowledge The street Phosphate Backbone


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


Possible Answers:

ionic


metallic


weak


covalent


hydrogen


Correct answer:

covalent


Explanation:

The bond formed between the street of one nucleotide and the phosphate of an surrounding nucleotide is a covalent bond. A covalent link is the share of electrons between atoms. A covalent shortcut is stronger than a hydrogen bond (hydrogen bonds organize pairs the nucleotides together on opposite strands in DNA). Thus, the covalent link is crucial to the backbone of the DNA. 


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Example concern #1 : knowledge Nucleotides and also Base bag


Which the the adhering to nitrogenous bases is offered to produce RNA, but not DNA?


Possible Answers:

Uracil


Thymine


Adenine


Guanine


Correct answer:

Uracil


Explanation:

Uracil is bound to adenine in the manufacturing of RNA, if thymine is used in its location in the manufacturing of DNA. Adenine, guanine, and also cytosine room all offered in the production of both RNA and also DNA.


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Example question #2 : knowledge 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 to be CGTTTGAC?


Possible Answers:

*



*


*


*


Correct answer:


Explanation:

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

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

*


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Example concern #3 : understanding Nucleotides and Base pairs


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


Possible Answers:

Hydrogen


Carbon


Potassium


Phosphorus


Nitrogen


Correct answer:

Potassium


Explanation:

DNA and RNA are made of nucleotides, which contain oxygen, hydrogen, nitrogen, carbon, and phosphorus. The nucleic mountain backbone is consisted of of sugars, made of carbon, hydrogen, and also oxygen, and also phosphate groups, made of phosphorus, hydrogen, and oxygen. The backbone binding to bases, i m sorry contain a nitrogen element.

Potassium is not discovered in nucleic acid structure, and also is supplied in various other parts the the body like muscles and also nerves for signal propagation.


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Example question #4 : knowledge 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 a phosphate


A nitrogenous base, a ribose or deoxyribose sugar, and 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 in between a nucleoside and also a nucleotide. A nucleoside is created 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 the nucleosides room incomplete nucleotides, and also lack a phosphate group.


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Example concern #5 : understanding Nucleotides and also Base bag


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


Possible Answers:

Ionic interactions in between the bases


A covalent link is formed


Maximized variety of hydrogen bonds


Bond power is maximized


Correct answer:

Maximized variety of hydrogen bonds


Explanation:

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

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

 


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Example question #6 : knowledge Nucleotides and also Base bag


Chargaff is credited with which of the complying with discoveries around DNA basic pairs?


Possible Answers:

The proportion of adenine to guanine is near to 

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


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


The proportion of adenin to cytosine is close to

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


Correct answer:

The proportion of adenin 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. Adenin is paired with thymine and also guanine is paired v cytosine. Chargaff found that over there is generally an equivalent variety of adenine and also thymine bases, and an equivalent variety of guanine and cytosine bases. In a offered sample of DNA, all adenine residues will have actually thymine counterparts ~ above the complementary strand, and also all cytosine residual water will have complementary guanine counterparts. Together a result, there will certainly be equal numbers of each residue that the base pair in any kind of sample the double-stranded DNA.

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