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.
There are exactly 52.1428571429 weeks in the year 2015. This is equivalent to 52 weeks and 1 extra day, since there are 365 total days in 2015. Most years have 365 days, but a leap year has 366 days. That adds up to 52 weeks (where each week is exactly 7 days) PLUS 1 or 2 additional days.The year 2015 has exactly 365 days. Now if the year starts on a week in a non-leap year, you end up with 53 weeks. Or if either of the first two days lands on a week during a leap year, then you can also get 53 weeks.hat adds up to 52 weeks (where each week is exactly 7 days) PLUS 1 or 2 additional days. The year 2015 has exactly 365 days. Now if the year starts on a week in a non-leap year, you end up with 53 weeks.