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In 1953,JAMES WATSON and FRANCIS CRICK porposed the model for the structure of DNA. According to them DNA molecule consist of two polynucleotide strands which are twisted around each other in the form of DOUBLR HELIX. The double helic looks like spiral staircase of uniform diameter. The two poly nucleotide strands held in their helical configuration by the hydrogen bonds present between them. ADDENINE always pair up with guanine and thymine is always pair up with cytosine.HYDROGEN BONDS are present between the ADDENINE and GUANINE , CYTOSINE and THYMINE. Two hydrogen bonds are present between the ADDENINE and GUANINE while three hydrogen bonds are present between CYTOSINE and THYMINE. Due to these hydrogen bonds DNA keeps its shape.
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What must be broken for the DNA strand to separate?
Hydrogen bonds between the nitrogenous bases need to be broken for the DNA strand to separate during replication or transcription.
How are nucleotides in a single strand of a DNA molecule linked together?
Nucleotides in a single strand of a DNA molecule are linked together by strong chemical bonds called phosphodiester bonds. These bonds connect the sugar and phosphate groups of adjacent nucleotides, forming a long chain that makes up the DNA molecule.
In a DNA double helix an adenine of one strand always pairs with an?
In a DNA double helix, an adenine of one strand always pairs with a thymine of the complementary strand via hydrogen bonds.
How does DNA polymerase III add nucleotides during the process of DNA replication?
DNA polymerase III adds nucleotides during DNA replication by attaching them to the growing DNA strand in a specific order that matches the complementary bases on the template strand. This enzyme catalyzes the formation of phosphodiester bonds between the nucleotides, creating a new strand of DNA that is identical to the original template strand.
What is the molecule that seals the gaps between the pieces of DNA in the lagging strand is?
The molecule that seals the gaps between the pieces of DNA in the lagging strand is DNA ligase. DNA ligase is an enzyme that catalyzes the formation of phosphodiester bonds between adjacent DNA fragments, joining them together to create a continuous strand.
A bonds with what?
Adenine bonds with thymine in a DNA strand, however, in an RNA strand, Adenine bonds with uracil.
What does a bond with?
Adenine bonds with thymine in a DNA strand, however, in an RNA strand, Adenine bonds with uracil.
What is a strand of DNA composed of?
hydrogen bonds
What must be broken for the DNA strand to separate?
Hydrogen bonds between the nitrogenous bases need to be broken for the DNA strand to separate during replication or transcription.
What must be broken for DNA strand to be separate?
Hydrogen Bonds
What enzyme links DNA nucleotides to a growing daughter strand?
DNA polymerase is the enzyme that links DNA nucleotides to a growing daughter strand during DNA replication. It catalyzes the formation of phosphodiester bonds between adjacent nucleotides on the new DNA strand.
How many total hydrogen bonds would exist between the dna strand and its complementary strand 5'ACTCTAG 3'?
There would be 13 hydrogen bonds formed between the DNA strand 5'ACTCTAG 3' and its complementary strand. Each adenine forms two hydrogen bonds with thymine, and each cytosine forms three hydrogen bonds with guanine.
What bonds are broken in order the unzip the DNA strands?
The hydrogen bonds are broken in order to unzip the DNA strand. This all occurs during the DNA replication process.
What types of linkage joins the nucleotides a within a single DNA strand and b between two single DNA strands?
a. Phosphodiester bonds link nucleotides within a single DNA strand. b. Hydrogen bonds link complementary base pairs between two single DNA strands.
What does Adenine A bond with?
Adenine bonds with thymine in DNA and uracil in RNA.
How are nucleotides in a single strand of a DNA molecule linked together?
Nucleotides in a single strand of a DNA molecule are linked together by strong chemical bonds called phosphodiester bonds. These bonds connect the sugar and phosphate groups of adjacent nucleotides, forming a long chain that makes up the DNA molecule.
What is the kind of covalent linkage which joins adjacent nucleosides in the same strand of DNA?
Adjacent nucleosides in DNA are joined by phosphodiester bonds, which are covalent bonds between the phosphate group of one nucleoside and the sugar group of another nucleoside. These bonds create the sugar-phosphate backbone of the DNA strand.
