The answer is -Prokaryotic cells have single strands of DNA, and eukaryotic cells have multiple chromosomes.
The main difference between prokaryotic and eukaryotic cells is that eukaryotic cells have long tangled strands of DNA packed in the nucleus, and prokaryotic do not have nucleus and their DNA is short stranded. Since DNA strand are very long in eukaryotic cells, they are organised in chromosomes. The number of chromosomes is different for each species, and 23 chromosomes are characteristic for humans.
¡Hola a ti también! :)
Pido disculpas por si mi discurso le suena extraño; Estoy usando un traductor de Google porque solo sé un poco de español.
Hay muchos libros sobre medicina forense, que incluyen un libro llamado "Medicina forense para tontos", que probablemente sea un buen lugar para comenzar. Si vive cerca de una biblioteca o una librería, entonces debería poder preguntarle a alguien que trabaje allí si puede ayudarlo a encontrar un par de libros para usted. Otra opción sería obtener una aplicación de algún tipo que le permita comprar / leer libros allí. Espero haber ayudado a algunos, o al menos haberles dado algunas ideas nuevas.
The organism under study, which will be used to donate DNA for the analysis, is called the donor organism. The basic procedure is to extract and cut up DNA from a donor genome into fragments containing from one to several genes and allow these fragments to insert themselves individually into opened-up small autonomously replicating DNA molecules such as bacterial plasmids. These small circular molecules act as carriers, or vectors, for the DNA fragments. The vector molecules with their inserts are called recombinant DNA because they consist of novel combinations of DNA from the donor genome (which can be from any organism) with vector DNA from a completely different source (generally a bacterial plasmid or a virus). The recombinant DNA mixture is then used to transform bacterial cells, and it is common for single recombinant vector molecules to find their way into individual bacterial cells. Bacterial cells are plated and allowed to grow into colonies. An individual transformed cell with a single recombinant vector will divide into a colony with millions of cells, all carrying the same recombinant vector. Therefore an individual colony contains a very large population of identical DNA inserts, and this population is called a DNA clone. A great deal of the analysis of the cloned DNA fragment can be performed at the stage when it is in the bacterial host. Later, however, it is often desirable to reintroduce the cloned DNA back into cells of the original donor organism to carry out specific manipulations of genome structure and function.
The answer is A (the sun)
