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DNA molecules have a consistant width of about 2.5 nanometers (a nanometer is one billionth of a meter; human hair has a thickness of roughly 20,000 nm to 180,000 nm), but the length of DNA molecules varies greatly. Scientists usually describe the length of DNA using a unit called kb or kbp. One kb is 1000 base pairs, the base pair being the basic repeating nucleotide unit of the DNA chain. Each base pair has a length of 0.33 nm. Plasmid DNA might have a length of 1-200 kb, or 0.33 nm to 66 nm. Bacterial chromosomal DNA length would be perhaps 3800 kb, or 1300 nm (1.3 microns). The length of human chromosome number 1 DNA is 200,000 kb, or 67,000 nm (67 microns). Of course, within the cell, DNA is coiled into a ball much smaller than its length.
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DNA molecules that are produced by combining DNA from different sources are called?
The word you're looking for may be "recombinant".
Which of the nucleotides occurs in DNA molecules but not in RNA molecules?
Thymine is a nucleotide that occurs in DNA molecules but not in RNA molecules. In RNA, thymine is replaced by uracil.
What enzyme is responsible for cutting DNA molecules?
The enzyme responsible for cutting DNA molecules is called a restriction enzyme.
Enzymes used to cut DNA molecules in recombinant DNA researsh are?
Restriction enzymes are used to cut DNA molecules in recombinant DNA research. These enzymes recognize specific DNA sequences and cleave the DNA at those sites, allowing scientists to splice DNA fragments from different sources together to create recombinant DNA molecules.
What are the two parts of the backbone of DNA?
The two parts of the backbone of DNA are sugar and phosphate molecules. These molecules alternate in a pattern, forming the structure of the DNA double helix.
What are the smaller units that DNA are made of?
Molecules. DNA is a big molecule made by smaller molecules. http://en.wikipedia.org/wiki/DNA
DNA replications begins in areas of DNA molecules called what?
DNA replication begins in areas of DNA molecules are called origins of replication.
What makes of the sides of the ladder of a DNA molecule?
The sides of the DNA ladder are alternating deoxyribose (sugar) molecules and phosphate molecules. The DNA bases attach to the sugar molecules.
What molecules are found in chromosomes?
DNA molecules.
DNA molecules that are produced by combining DNA from different sources are called?
The word you're looking for may be "recombinant".
How does DNA molecules differ from daughter DNA molecules?
DNA molecules contain genetic information in a double-stranded helical structure, while daughter DNA molecules are formed during DNA replication and consist of two identical copies of the original DNA molecule. Daughter DNA molecules are produced through a semi-conservative process where one strand of the original DNA molecule is conserved in each daughter molecule.
How are 2 double stranded DNA molecules created?
Two double stranded DNA molecules are created by the process of DNA replication.
What is The number of DNA molecules present in a duplicated chromosome is?
2 DNA molecules College Biology Chapter 9
Which molecules carry genetic information from one generation to the next?
They are DNA molecules. They are stored in chromosomes
Which of the nucleotides occurs in DNA molecules but not in RNA molecules?
Thymine is a nucleotide that occurs in DNA molecules but not in RNA molecules. In RNA, thymine is replaced by uracil.
What type of molecules are in DNA?
DNA is a molecule. There are also a bunch of proteins/molecules called histones that organise the DNA molecule into a condensed state.
Does DNA have large molecules?
no but has many small molecules
