Ethidium bromide binds with DNA and slips in between its hydrophobic base pairs and stretches the DNA fragment, removing water molecules from the ethidium cation.The result of this dehydrogenation is an increase in fluorescence of the ethidium (as well as the cell).ence it is useful in visualizing DNA. Unfortunately, ethidium bromide does not distinguish between what DNA it binds to, whether it be ours or our sample's. Hence ethidium bromide is a mutagen, suspected carcinogen and at high concentrations is irritating to the eyes, skin, mucous membranes and upper respiratory tract.
Nearly every 4 years is a Leap Year, and we add a Leap Day, an extra â or intercalary â day on February 29. Leap years have 29 days in February, not 28. Nearly every 4 years is a Leap Year, and we add a Leap Day on February 29. A leap year has 366 days, as opposed to a common year, which has 365.
âºâº Number of days in 2015. 2015 is not a leap year, so there are 365 days in the year. You can also choose any day of the week and count how many times it occurs in 2015. Here are some shortcut links if you'd like to explore: