Which Represents a Strand of Rna Bases

Which Represents a Strand of Rna Bases

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Which of the post-obit choices displays complementary Dna strands?

Correct answer:

3′-ATTGC-5’

v’-TAACG-iii’

Explanation:

When determining complementary strands, in that location are a few important points to consider. First, remember that uracil is only found in RNA. Nosotros can eliminate any answer choices that contain uracil. Second, remember that Dna is anti-parallel. This ways that the 3′ end of the template strand must friction match upwardly with the 5′ terminate of the complementary strand. Flip any answers that have both 3′ ends together. Finally, make sure that the bases marshal correctly. Adenine and thymine should always pair and cytosine and guanine should e’er pair.

Template strand: three’-ATTGC-five’

Complementary strand is antiparallel: 5′-_ _ _ _ _-3′

Complementary strand must have correct base pairs: 5′-TAACG-3′

An alternating way of writing this answer would be iii’-GCAAT-v’. This reply would still exist right! Information technology would simply need to be flipped, as in the second step outlined above.

Which of the following could exist a segment of DNA?

Possible Answers:

5′-CTCGTG-3′

3′-AATGTA-five’

5′-CTAGAG-iii’

iii’-GATCTC-5′

5′-CTCGTG-3′

three’-GATCTC-5′

5′-AGATAG-3′

3′-GATCTC-v’

five’-GTCGAT-3′

3′-GATCTC-5′

Correct answer:

5′-CTAGAG-3′

3′-GATCTC-5′

Caption:

DNA is a double stranded molecule that is antiparallel, significant the v’ end of one strand matches upwards with the 3′ end of the other strand. Nitrogenous bases hold the strands together via hydrogen bonding. These bases are adenine (A), thymine (T), guanine (G), and cytosine (C). Adenine (A) tin only pair with thymine (T), and guanine (Chiliad) can only pair with cytosine (C).

The correct answer presents two strands that are antiparallel and show proper binding patterns.

five’-CTAGAG-3′

3′-GATCTC-v’

All other answers have an fault in base pairing or ordering.

Which of the following describes the components of a nucleotide?

Possible Answers:

A phosphate group, a hexose carbohydrate, and a nitrogenous base

A phosphate group, a pentose sugar, and a nitrogenous base

ATP, a pentose saccharide, and a nitrogenous base

ATP, a hexose saccharide, and an amino acrid

A phosphate group, a pentose saccharide, and an amino acid

Right reply:

A phosphate grouping, a pentose carbohydrate, and a nitrogenous base

Caption:

Nucleic acids are one of the primary biological macromolecules, and include DNA and RNA. A nucleotide is a Dna monomer, while a ribonucleotide is an RNA monomer. Numerous nucleotides are bonded together by phosphodiester bonds to course a single molecule of Deoxyribonucleic acid. The pattern of nucleotides is used to store and transmit hereditary information. A nucleotide is composed of a phosphate group, a nitrogenous base of operations, and a pentose sugar (deoxyribose).

Which of the following DNA primers has the lowest melting point?

Possible Answers:

GCGGATGTGTCC

GCCACAGGTGGA

TGACAAACTTGT

CATGCGTAGATC

AGGTGGACACCG

Correct answer:

TGACAAACTTGT

A section of double-stranded Dna is equanimous of 35% adenine bases. What is the percentage of cytosine bases in the section of DNA?

Possible Answers:

More information is needed in order to answer the question

Correct answer:

Explanation:

Since we know that 35% of the bases in the section of DNA are adenine, we can conclude that 35% of the bases are thymine. This is because adenine will ever pair with thymine, then there will exist simply every bit many thymine bases as adenine bases. Together, adenine and thymine etch 70% of the segment.

This means that 30% of the section is equanimous of guanine-cytosine pairs.

Since these two bases will exist equal in quantity, 15% of the Dna section will be cytosine bases.

In a sample of DNA, 30% of the bases are found to exist guanine. What percentage of the bases in the sample are thymine?

Right reply:

Explanation:

Guanine will pair with cytosine. From this knowledge, we tin can presume that there will be an equal number of guanine and cytosine residues in the sample. Each guanine must have a cytosine analogue.

The total composition of the Dna sample must be accounted for by the sum of all the bases.

Utilize the known values for guanine and cytosine to find the sum of adenine and thymine.

Like cytosine and guanine, adenine and thymine must be present in equal amounts in gild to class proper base pairs. We can reasonably assume that one-half of the remaining DNA will consist of each rest.

An analysis of a DNA sample indicates it contains 35% adenine. What percent of the sample would exist cytosine?

Correct answer:

Explanation:

There are four nitrogenous bases found in Deoxyribonucleic acid: adenine, thymine, cytosine, and guanine. Adenine e’er binds with thymine, and cytosine always binds with guanine.

Since certain bases ever announced in pairs, they will have equal percentages of the DNA composition. The percent of adenine volition equal the percent of thymine, and the percent of cytosine will equal the pct of guanine. Together, these percentages volition add to 100%.

We know that the sample is 35% adenine, which tells us that it is too 35% thymine.

Nosotros know that cytosine and guanine pair together and will be present in equal amounts, so we tin can divide this final total by 2 to detect our answer.

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The sample is 35% adenine, 35% thymine, xv% guanine, and 15% cytosine.

A strand of DNA was measured to contain 22% adenine. What is the Dna’due south composition of the other bases?

Possible Answers:

22% Adenine, 22% Cytosine, 28% Guanine, 28% Thymine

22% Adenine, 22% Guanine, 28% Cytosine, 28% Uracil

22% Adenine, 22% Uracil, 28% Cytosine, 28% Guanine

22% Adenine, 22% Guanine, 28% Cytosine, 28% Thymine

22% Adenine, 22% Thymine, 28% Cytosine, 28% Guanine

Right reply:

22% Adenine, 22% Thymine, 28% Cytosine, 28% Guanine

Explanation:

We can utilize Chargaff’s rule to find the remaining compositional percentages. Adenine always pairs with thymine, so their percentages volition be equal. Cytosine always pairs with guanine, so their percentages will also exist equal. The sum of all four percentages must equal 100%.

We know that the sample is 22% adenine; this tells u.s. it is also 22% thymine.

Since cytosine and guanine are present in equal amounts, we can simply divide their sum by ii.

The last composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine.

Uracil is merely found in RNA.

A strand of RNA is equanimous of 20% adenine and thirty% guanine.

What is the strand’south composition of the other bases?

Possible Answers:

twenty% Adenine, 30% Guanine, 30% Thymine, twenty% Cytosine

20% Adenine, 30% Guanine, 20% Uracil, 30% Cytosine

Cannot determine from the given information

20% Adenine, xxx% Guanine, xxx% Uracil, xx% Cytosine

twenty% Adenine, 30% Guanine, 20% Thymine, 30% Cytosine

Right answer:

Cannot make up one’s mind from the given information

Explanation:

Chargaff’southward dominion only applies to Dna. RNA is single-stranded, and thus, no base pairing occurs.

Think of a strand of Dna. Each base pairs with a specific partner, allowing united states to determine their percentages: adenine and thymine are always equal, and cytosine and guanine are always equal. In RNA, with this pairing absent, there is no correlation between the base of operations percentages. A strand could be 20% adenine, 30% guanine, five% cytosine, and 45% uracil; nosotros only cannot depict any conclusions.

What are the monomers of Deoxyribonucleic acid?

Possible Answers:

Nucleotides

Phosphate-sugar backbone

Deoxyribose sugars

Nitrogen atoms

Correct answer:

Nucleotides

Caption:

A polymer is a macromolecule that is fabricated up of subunits that are repeated or very similar. These subunits are called monomers. DNA is a polymer fabricated upwardly of monomer units called nucleotides. Nucleotides are made up of a phosphate group, a 5-carbon sugar (deoxyribose, in the case of DNA), and a variable nitrogenous base of operations. In that location are four dissimilar nucleotides that make up the polymer of DNA: thymine, cytosine, adenine, and guanine. These 4 nucleotides vest to two different classes based on structure. Adenine and guanine are purines that take two carbon-nitrogen rings. Thymine and cytosine are pyrimidines that have simply one carbon-nitrogen band.

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Which Represents a Strand of Rna Bases

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