2 DNA molecules
College Biology Chapter 9
gene,chromosome THEN nucleus :) HOPE YOU DO WELL !!
Just before mitosis, a chromosome consists of two sister chromatids joined by a centromere. Each sister chromatid contains one DNA molecule. Therefore, there are two DNA molecules in a chromosome just before mitosis.
Each chromosome contains a single DNA molecule that is highly compacted and coiled around proteins. This single DNA molecule contains all the genetic information for an organism.
The chromosome number after meiosis is denoted as haploid, meaning that the cells have half the number of chromosomes compared to the original cell. In humans, the chromosome number after meiosis is 23.
The number of bromine molecules present in the flask can be calculated using Avogadro's number, which is 6.022 x 10^23 molecules/mol. In this case, there are 0.380 mol of bromine, so the number of bromine molecules present is 0.380 mol x 6.022 x 10^23 molecules/mol.
The subscript in a chemical formula indicates the number of identical molecules present. For example, H2O indicates two molecules of water present.
During cell division, a structure called the mitotic spindle separates the duplicated chromosomes and ensures that each daughter cell receives the correct number of chromosomes. Additionally, checkpoints in the cell cycle regulate the progression of mitosis to ensure that the chromosomes are apportioned correctly and the daughter cells have the proper chromosome number.
To find the number of molecules present in 936 g of glucose, you would first calculate the number of moles of glucose using its molecular weight. Then, you would use Avogadro's number (6.022 x 10^23 molecules/mol) to convert moles to molecules.
gene,chromosome THEN nucleus :) HOPE YOU DO WELL !!
It gives the number of atoms or molecules of a substance which will be present in one mole.
If you meant 1.5*10^23 and not 1.51023 molecules, see below:1.5*10^23 molecules / (6.022*10^23 molecules/mol)= 1.5/6.022 mol=.25 moles, rounded to two significant figures.
If the water is impure, you could remove the impurities. If the water is pure, it's impossible to decrease the number of molecules without changing the number of water molecules, which would be the only kind of molecules present in that case.