What is the percentage of guanine in a DNA sample containing 20% thymine?
20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.
How much adenine guanine and cytosine are present if a DNA strand contains 20% thymine?
Thus, if a double-stranded DNA has 20% cytosine, it has 20% guanine. Thus, C + G makes 40% of the total bases. The remaining 60% includes both adenine and thymine which are in equal amounts. So, the percentage of adenine is 30%.
What percentage would make up thymine?
What percentage of the nucleotides in this sample will be thymine?
Why does the DNA double helix have a uniform?
The major and minor grooves, which wrap around the entire molecule, are apparent as the spaces between the sugar-phosphate backbones. The diameter of the DNA double helix is 2 nm and is uniform throughout. Only the pairing between a purine and pyrimidine can explain the uniform diameter.
Which list gives the steps of DNA replication in the correct order?
There are three main steps to DNA replication: initiation, elongation, and termination. In order to fit within a cell’s nucleus, DNA is packed into tightly coiled structures called chromatin, which loosens prior to replication, allowing the cell replication machinery to access the DNA strands.
What is the order of DNA replication?
Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
What enzymes are needed for DNA replication?
During DNA replication, one new strand (the leading strand) is made as a continuous piece. The other (the lagging strand) is made in small pieces. DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.
What do the molecules labeled a C G and T represent in this DNA helix?
The DNA molecule actually consists of two such chains that spiral around an imaginary axis to form a double helix (spiral.) In DNA, Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).
What are the 4 base pairs of DNA?
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T).
What 4 bases make up DNA molecules?
Figure 2: The four nitrogenous bases that compose DNA nucleotides are shown in bright colors: adenine (A, green), thymine (T, red), cytosine (C, orange), and guanine (G, blue).
Is the five carbon sugar found in DNA?
Components of DNA DNA is a polymer. The monomer units of DNA are nucleotides, and the polymer is known as a “polynucleotide.” Each nucleotide consists of a 5-carbon sugar (deoxyribose), a nitrogen containing base attached to the sugar, and a phosphate group.
What is the 5 carbon sugar called?
Which sugar is found in DNA?
What is the five-carbon sugar found in DNA called?
Where in a cell can DNA be found?
What are the 3 structures of DNA?
The Building Blocks of DNA DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine.
Why is DNA called the blueprint of life?
DNA is called the blueprint of life because it contains the instructions needed for an organism to grow, develop, survive and reproduce. Proteins do most of the work in cells, and are the basic unit of structure and function in the cells of organisms.
What are the similarities and differences between RNA and DNA?
The DNA and RNA Structures Nucleotides simply refer to nitrogenous bases, pentose sugar together with the phosphate backbone. Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine).