Explanation:

DNA is a double-stranded helix. The 2 sugar-phosphate backbones are connected by hydrogen bonds the for between nitrogenous bases. The DNA bases space adenine (A), thymine (T), cytosine (C), and guanine (G). In DNA, adenine always pairs through thyine and also cytosine always pairs through guanine. These pairings occur since of geometry of the base,s permit hydrogen bond to type only between the "right" pairs. Adenine and also thymine will kind two hydrogen bonds, vice versa, cytosine and guanine will kind three hydrogen bonds. This hydrogen bonding brings security to the DNA. 


Report one Error

Example concern #42 : Dna


The double-helix framework of DNA was discovered using X-ray crystallography (Rosalind Franklin) and also elucidated by Watson and also Crick. Before this discovery, it to be previously recognized that DNA is consisted of of 4 nucleotide bases: adenine, thymine, guanine, and also cytosine. Adenine always binds to thymine, if guanine always binds come cytosine.

You are watching: Which of these bases form a true complementary pair?


You analysis a double-helix and also determine that 17% the the helix is comprised of the nucleotide adenin (A). What percent of the exact same helix should be consisted of of the nucleotide guanine (G)?


Possible Answers:

*


*



*


*


Correct answer:


Explanation:

Nucleotides the bind with each other will always be existing in equal amounts in a sample that DNA. This rule is recognized as Chargaff"s rule. Essentially, the percentage of adenine will be same to the percent of thymine, while the percentage of guanine will be equal to the portion of cytosine.

Together, every one of the percentages must add up come 100%.

We understand that the sample is 17% adenine, which method it is likewise 17% thymine.

We deserve to use this equation to settle for the portion of guanine.

Guanine and also cytosine pair together, which method they will be current in same amounts. To find the percentage of guanine, we deserve to simply division by 2.

You can examine your prize if needed:


Report one Error

Example question #43 : Dna


In complementary base pairing that DNA, guanine always pairs through __________ and adenine constantly pairs with __________.


Possible Answers:

guanine . . . Adenine


thymine . . . Cytosine


cytosine . . . Uracil


cytosine . . . Thymine


Correct answer:

cytosine . . . Thymine


Explanation:

The 4 nitrogenous bases the DNA space thymine, adenine, guanine, and also cytosine. Guanine and also cytosine are bound together by 3 hydrogen bonds; whereas, adenine and thymine room bound together by 2 hydrogen bonds. This is well-known as complementary basic pairing. In RNA, the nucleotide thymine is replaced by the nucleotide uracil.


Report an Error

Example inquiry #11 : Dna framework


Which kind of shortcut is responsible because that holding complementary basic pairs together?


Possible Answers:

Single covalent bond


Double covalent bond


Ionic bond


Hydrogen bond


Correct answer:

Hydrogen bond


Explanation:

DNA (Deoxyribonucleic acid) is a chain of 2 strands that nucleotide the are attached to one an additional through hydrogen bonding and arranged right into a structure known as a double-helix. Nucleotides room molecular materials of DNA that are composed of a deoxyribose sugar, a nitrogenous base, and also a phosphate group. The backbone that DNA consists of phosphodiester bonds made up of interchanging phosphate groups and deoxyribose sugars. The 4 nitrogenous bases that DNA room thymine, adenine, guanine, and cytosine. Guanine and cytosine are bonded together by three hydrogen bonds; whereas, adenine and also thymine space bonded together by two hydrogen bonds. This is well-known as complementary basic pairing. One strand that the DNA twin helix will be in a 5’

*
 3’ direction in relationship to the –OH team on the deoxyribose sugar. The various other strand is oriented in the 3’
*
 5’ direction.


Report one Error

Example inquiry #45 : Dna


The orientation the the two strands the the DNA molecule are thought about to be __________.


Possible Answers:

antiparallel


parallel


perpendicular


transverse


Correct answer:

antiparallel


Explanation:

DNA is a chain of two strands that nucleotides that are connected to one another through hydrogen bonds and arranged into a structure recognized as a double-helix. Nucleotides room molecular components of DNA that are composed that a deoxyribose sugar, a nitrogenous base, and also a phosphate group. The backbone the DNA is composed of phosphodiester bonds comprised of interchanging phosphate groups and also deoxyribose sugars. The 4 nitrogenous bases the DNA room thymine, adenine, guanine, and cytosine. Guanine and cytosine space bound together by three hydrogen bonds; whereas, adenine and thymine space bound together by 2 hydrogen bonds. This is known as complementary base pairing. One strand that the DNA dual helix will be in a 5’

*
 3’ direction in relationship to the
*
 group top top the deoxyribose sugar. The various other strand is oriented in the 3’
*
 5’ direction. This is why DNA is thought about antiparallel.


Report an Error

Example question #46 : Dna


You analysis a double-helix and also determine that 17% the the helix is comprised of the nucleotide adenine (A). What percent of the very same helix need to be consisted of of the nucleotide guanine (G)?


Possible Answers:
Correct answer:


Explanation:

Nucleotides that bind together will constantly be present in equal quantities in a sample the DNA. This principle is recognized as Chargaff"s rule. Essentially, the percent of adenine will be same to the percent of thymine, when the percentage of guanine will be same to the percentage of cytosine.

Together, all of the percentages must add up to 100%.

We know that the sample is 17% adenine, which means it is additionally 17% thymine.

We have the right to use this equation to resolve for the percentage of guanine.

Guanine and cytosine pair together, which way they will certainly be existing in same amounts. To uncover the portion of guanine, we have the right to simply division by 2.

You can check your prize if needed:


Report an Error

Example inquiry #21 : Dna framework


DNA polymerase is offered to crate a new DNA strand based on the following template strand.

5"-GCCTCATGA-3"


Which the the adhering to shows the exactly complementary strand?


Possible Answers:

5"-CGGAGTACT-3"


5"-TCATGAGGC-3"


5"-UCAUGAGGC-3"


5"-AGTACTCCG-3"


Correct answer:

5"-TCATGAGGC-3"


Explanation:

When identify the safety strand, remember the it will be composed in the contrary direction that the layout strand. This means that the new strand"s 5" end will start at the 3" finish of the design template strand. The complementary strand will additionally be written of the nucleotides that complete the base pairs uncovered in DNA (A-T and also C-G).

Template: 5"-GCCTCATGA-3"

Answer: 5"-TCATGAGGC-3"

To check out these pairs match up, the 3" end of the answer need to align with the 5" end of the template.

Template: 5"-GCCTCATGA-3"

Answer (3"-5"): 3"-CGGAGTACT-5"


Report one Error

Example inquiry #22 : Dna structure


Which of the following bases room purines?


Possible Answers:

Guanine and also cytosine


Adenine, thymine, and uracil


Adenine and also thymine


Adenine and guanine


Cytosine, thymine, and also uracil


Correct answer:

Adenine and also guanine


Explanation:

There are two great of bases in DNA and also RNA: purines and pyrimidines. The difference between these classes is the framework of the base. Purines have actually two rings in your structure, when pyrimidines have only one. Purines will certainly pair through pyrimidines.

The purines room adenine and guanine, and also the pyrimidines are thymine, cytosine, and uracil. You have the right to remember that the bases that contain a "y" room pyrimidines (thymine and cytosine).


Report an Error

Example question #41 : Dna


What is a usual feature of every the nucleotides in DNA?


Possible Answers:

They space all supplied in equal quantities in a strand of DNA


They space bound to a sugar backbone


Each the the nucleotides deserve to bind to any type of of the other ones


They contain the same atoms in various structures


They room the same nucleotides supplied in RNA


Correct answer:

They room bound come a street backbone


Explanation:

There are 4 nitrogenous bases in DNA: adenine, guanine, cytosine, and thymine. A nucleotide is composed of one of these bases bound come a deoxyribose sugar and also a phosphate group. Polymers of nucleotides type strands the DNA, i m sorry adhere to one another by hydrogen bonding between the bases.

Each strand the DNA is unique and may contain any type of ratio the the nitrogenous bases, but strands of DNA will always be complementary to one another. The framework of the bases requires that adenine bind to thymine and also cytosine tie to guanine to preserve the structural integrity of the DNA molecule. RNA does not contain thymine, and instead offers uracil.


Report an Error

Example concern #50 : Dna


The DNA that a eukaryotic cell is found to contain 30% cytosine. The DNA additionally contains __________.


Possible Answers:

30% thymine


20% guanine


20% adenine


30% adenine


Correct answer:

20% adenine


Explanation:

There are four bases in DNA: adenine, thymine, guanine, and cytosine. Adenine constantly pairs v thymine, therefore the number of adenine residues constantly equals the number of thymine residues. Guanine always pairs v cytosine, which method they are constantly present in equal amounts as well. If one strand includes three cytosine bases and also five thymine bases, climate the the contrary strand need to contain three guanine bases and five adenine bases.

The trick come this problem is remembering that the amount of all four bases through percentage need to be 100%.

*

We recognize that 30% the the bases room cytosine. Due to the fact that cytosine pairs through guanine, over there is additionally 30% guanine.

*

*

That leaving us v 40% of the bases gift thymine and also adenine.

*

Since adenine and also thymine will be equal, each will stand for 20% of the DNA composition.

See more: Solved How Many Moles Of Ammonium Ions Are In 6.955 G Of Ammonium Carbonate? ?

*

*


Report one Error
← vault 1 2 3 4 5 6 7 8 9 following →
see Tutors
Pamela Certified tutor
USF, Bachelor in Arts, Interdisciplinary organic Sciences.
check out Tutors
Megan Certified tutor
Saint Marys college of California, Bachelor that Science, Biology, General. Old ascendancy University, master of Science, Biology...
see Tutors
Sidra Certified guardian
American college of Beirut, Bachelor the Science, Biology, General.

All High college Biology sources


10 Diagnostic tests 247 practice Tests concern of the work Flashcards find out by concept
Popular Subjects
LSAT Tutors in Phoenix, mathematics Tutors in Houston, French Tutors in Houston, reading Tutors in Philadelphia, biological Tutors in Denver, biologic Tutors in Dallas fort Worth, SSAT Tutors in Phoenix, MCAT Tutors in Philadelphia, SSAT Tutors in Seattle, French Tutors in Boston
Popular courses & Classes
ACT process & class in Seattle, LSAT process & classes in mountain Francisco-Bay Area, SAT courses & classes in Denver, Spanish process & classes in Chicago, ACT courses & classes in Denver, GMAT process & great in Miami, MCAT process & great in Houston, SAT process & great in Philadelphia, MCAT courses & great in Chicago, GRE process & classes in Dallas fort Worth
Popular check Prep
MCAT test Prep in Philadelphia, GRE test Prep in Boston, MCAT check Prep in Boston, ISEE test Prep in Philadelphia, GMAT test Prep in mountain Francisco-Bay Area, GRE test Prep in san Francisco-Bay Area, LSAT check Prep in Philadelphia, sat Test prep in Phoenix, ISEE check Prep in Los Angeles, GRE test Prep in Houston
Report an problem with this inquiry

If you"ve found an concern with this question, you re welcome let united state know. V the help of the neighborhood we can proceed to enhance our educational resources.


Do no fill in this field
* her Name:
* worry Description:
DMCA complaint

her Infringement an alert may it is in forwarded come the party the made the content obtainable or to 3rd parties such as ChillingEffects.org.

please follow these actions to record a notice:

friend must encompass the following:

Send your complaint to our designated certified dealer at:

Charles Cohn Varsity Tutors llc 101 S. Hanley Rd, Suite 300 St. Louis, MO 63105