Is DNA found in the cytoplasm of a cell?
Is DNA found in the cytoplasm of a cell?
It is now known that small circular chromosomes, called extranuclear, or cytoplasmic, DNA, are located in two types of organelles found in the cytoplasm of the cell. The cells of several groups of organisms contain small extra DNA molecules called plasmids.
Is DNA found in cytoplasm prokaryotic or eukaryotic?
Figure 23.1B. 1: Cellular location of eukaryotic and prokaryotic DNA: Eukaryotic DNA is stored in a nucleus, whereas prokaryotic DNA is in the cytoplasm in the form of a nucleoid.
How can DNA identify a person?
How can DNA be used to identify a person? DNA is useful to identify an individual because everyone’s genetic code (their genome) is thought to be unique, unless they have an identical twin. The string of chemical letters in a person’s DNA can therefore act like a unique bar code to identify them.
What can damage a DNA sample?
Ultraviolet and other types of radiation can damage DNA in the form of DNA strand breaks. This involves a cut in one or both DNA strands; double-strand breaks are especially dangerous and can be mutagenic, since they can potentially affect the expression of multiple genes.
Can you be framed by your own DNA?
Yes you can be framed by your own DNA!
What destroys touched DNA?
Environmental factors, such as heat and humidity, can also accelerate the degradation of DNA. For example, wet or moist evidence that is packaged in plastic will provide a growth environment for bacteria that can destroy DNA evidence.
Does bleach destroy DNA evidence?
Yes, if you know what you’re doing. Knox and Sollecito were on the right track: Bleach contains sodium hypochlorite, an extremely corrosive chemical that can break the hydrogen bonds between DNA base pairs and thus degrade or “denature” a DNA sample.
Does cooking destroy DNA?
No. Eating GM food will not affect a person’s genes. Most of the food we eat contains genes, although in cooked or processed foods, most of the DNA has been destroyed or degraded and the genes are fragmented. Our digestive system breaks them down without any effect on our genetic make-up.
Can too much luminol destroy DNA?
Luminol has been widely used in the field of crime scene investigations to detect latent blood; however, luminol has the tendency to destroy DNA evidence. Fluorescein, an alternative to luminol for detecting latent blood at a crime scene, does not destroy DNA evidence.
Does Luminol ruin DNA?
Our findings indicated that luminol had no destructive effect on species tests as well as on elution method for the detection of blood group antigens and does not have an adverse effect on subsequent DNA typing using PCR.
Does bleach affect luminol?
Chlorine bleaches can remove a Bloodstain to the naked eye but fortunately, forensics experts can use the application of substances such as luminol or phenolphthalein to show that haemoglobin is present. With oxygen bleach, the bleach has an oxidising agent, which could be a substance such as hydrogen peroxide.
Is DNA destroyed by heat?
There is little literature regarding the effect of fire and extreme heat on blood and the detection of blood. Blood and DNA are believed to be no longer traceable after exposure to a temperature of 1000 °C.
Can luminol be fooled?
Luminol is not a fool-proof method. While it reacts with the hemoglobin present in blood to cause the glowing reaction, it can also react with other substances giving a false positive result. Using Luminol in open air environments is not possible with no way to make the area dark and use the ultraviolet light.
Which type of DNA is easiest to collect?
Mitochondrial DNA