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प्रश्न
In a DNA strand the nucleotides are linked together by ______.
विकल्प
phosphodiester bonds
glycosidic bonds
peptide bonds
hydrogen bonds
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उत्तर
In a DNA strand, the nucleotides are linked together by phosphodiester bonds.
Explanation:
A phosphodiester bond is created between the 5’ phosphate group of one nucleotide and the 3’-OH group of another when nucleotides are integrated into DNA. Each strand of DNA has a phosphate-sugar-phosphate-sugar-phosphate “backbone” in this fashion.
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संबंधित प्रश्न
Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.
If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.
Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.
A nucleoside differs from a nucleotide. It lacks the ______.
While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29%, Guanine = 17%, Cytosine = 32%, Thymine = 17%. Considering the Chargaff’s rule it can be concluded that ______.
What is the nature of the strands of the DNA duplex?
How far is each base pair from the next one in DNA double helix model?
H-bonds between Cytosine and Guanine are ______.
DNA is made of two chains that twist about one another in the shape of a ______.
Which of the following is a structural subunit of DNA?
A short piece of DNA, having 20 base pairs, was analyzed to find the number of nucleotide bases in each of the polynucleotide strands. Some of the results are shown in the table.
| Number of nucleotide bases | ||||
| Adenine | Cytosine | Guanine | Thymine | |
| Strand 1 | 4 | 4 | ||
| Strand 2 | 5 | |||
How many nucleotides containing Adenine were present in strand 2?
Polymerase chain reaction (PCR) amplifies DNA following the equation.
A nucleotide is the monomer unit of a nucleic acid. Which of the following correctly identifies the three components of a nucleotide?
Which of the following nitrogenous bases is classified as a purine with a double-ring structure?
The phosphate group in a nucleotide is attached to which carbon of the pentose sugar?
What type of bond connects a nitrogenous base to the pentose sugar in a nucleotide?
Which end of a polynucleotide chain contains a free phosphate group?
The backbone of a polynucleotide chain is formed by which components?
In a DNA double helix, what is the spatial relationship between the two polynucleotide strands?
What is the significance of the 2′-OH group in ribose compared to deoxyribose?
A nucleotide is the monomer unit of a nucleic acid. Which of the following correctly identifies the three components of a nucleotide?
What structural difference exists between the pentose sugar found in DNA and the pentose sugar found in RNA?
What type of bond connects a nitrogenous base to the pentose sugar in a nucleotide?
What is the significance of the 2′-OH group in ribose compared to deoxyribose?
Why is the name 'deoxyribonucleic acid' appropriate for DNA?
Pyrimidines differ from purines in their basic structural feature. Which statement is correct?
