Green = lac repressor Red = DNA, operator region Blue = part of the operator (not a hairpin loop, its double stranded DNA) Repressor = a dimer and when it binds to the operator, it creates a loop to make it impossible for polymerase to get through In the lac operon, the beta galactoside bond…
What is an avalanche? , well it’s a large mass of snow and ice or of earth or rock sliding down a mountain side or a cliff. And how does an avalanche occur, well mainly they happen by vibrations caused by movement of the earth such as an earthquake, gunfire, rainy weather, and many more.…
Imagine if this article was written like this: Dyslexia is wehn yuor midn gets wodrs mixde pu. The word dyslexia is derived from the Greek “dys” (meaning poor or inadequate) and “lexis” (word or language). Dyslexia is a learning disability characterized by problems in expressive or receptive, oral or written language. It is characterized by…
Jonas Edward Salk was born to Polish-Jewish immigrants, Daniel B. and Dora Salk, on October 28, 1914. Dr. Salk was born in upper Manhattan, but then moved to the Bronx where he went to school. “His first spoken words were, ‘Dirt, dirt,’ instead of the conventional, uninspired ‘No, no’ or ‘Momma.’ He was a responsive…
Gone are the days when people sent children outside to play to get a little color in their cheeks. They know too much about the dangers of unprotected sun exposure and the threat of skin cancer. Or do they? Despite the fact that 58% of parents remembered hearing about the importance of protecting their children…
Corynebacteria are Gram-positive, aerobic, nonmotile, rod-shaped bacteria related to the Actinomycetes. They do not form spores or branch as do the actinomycetes, but they have the characteristic of forming irregular shaped, club-shaped or V-shaped arrangements in normal growth. They undergo snapping movements just after cell division which brings them into characteristic arrangements resembling Chinese letters.…
In modern society when a person gets sick with the flu or a cold they will usually go about their normal routine with the exception of a sneeze or a cough throughout the day. Sometimes things can be more than what they appear to be. The symptoms start out like the flu with coughing, fever,…
Huntington’s disease, or Huntngton’s chorea, is a genetic disease that causes selective neural cell death, which results in chorea, or irregular, jerking movements of the limbs caused by involuntary muscle contractions, and dementia. It can cause a lack of concentration and depression. It also may cause atrophy of the caudate nucleus, a part of the…
Multiple sclerosis is one of the most misunderstood diseases of this century. Since it’s discovery, there is still no known causes, no proven treatments, and no known cure, yet it affects possibly five hundred thousand people in the United States alone. People need to learn more about this disease so it can be brought to…
Mumps is a disease caused by a virus and occurs only in human beings. Mumps is found all over the world. Mumps is a contagious disease when the salivary glands, on one or both sides of the jaw, swells. Mumps usually occurs in school age children, but young adults may catch the disease. Everyone born…
Osteoporosis is a significant health problem that affects more than 25 million women in the United States and potentially 200 million worldwide. This disease is characterized by diminishing the structure of the skeleton (particular the “spongy” bone). This results in an increased risk of fracture. Osteoporosis develops silently over a period of years, eventually progressing…
Premature babies, otherwise known as preterm babies, or preemies, are babies that are born earlier than the full-term of thirty-eight to forty-two weeks of pregnancy. These babies are generally born between the twentieth and thirty-eighth week. Almost 250,000 babies, nearly seven percent of newborns, are premature(Golant 4). Prematurity, even with all the advances in technology,…
Small pox, which was once the most feared disease known by mankind started out in the days of Christopher Columbus. The disease set out to change the lives of the people in the worse way. It became known as an epidemic disease that ended up killing hundreds of people. Small pox started out in Hispaniola…
Reye Syndrome is an extremely rare, non-contagious disease thought to be triggered by aspirin use. The actual origin of the disease is unknown. Reye’s Syndrome, occasionally called Reye-Jacobsen’s Syndrome, is known to follow any viral infection. Two of the most common viral infections it precedes is influenza, “the flu”, and chicken pox. A now-familiar warning…
Relaxation is what is expected at Toledo Bend, but this beautiful reservoir is full of surprises. From old fisherman on the lake or jet skiing, this lake is the place to be. Spectacular fishing spots are located by guides on the many tour boats. Hundreds of shallow beaches are open to the public along this…
Ritalin (Methylphenidate) is a mild CNS stimulant. In medicine, Ritalin’s primary use is treatment of Attention Deficit /Hyperactive Disorder (ADHD). The mode of action in humans is not completely understood, but Ritalin presumably activates the arousal system of the brain stem and the cortex to produce its stimulant effect. Recently, the frequency of diagnosis for…
Throughout history marijuana has been used to serve various purposes in many different cultures. The purposes have changed over time to fit in with the current lifestyles. This pattern is also true in American history. The use of marijuana has adapted to the social climate of the time. Marijuana, whose scientific name is cannabis sativa,…
While many drugs speed up or depress the central nervous system, there is a class of drugs that distorts how we feel, hear, see, smell, taste, and think. Called hallucinogens because users often hallucinate, or experience nonexistent sensations, these drugs are also known as psychedelic, or mind-bending, drugs. Some hallucinogens come from natural sources; others…
LSD or lysergic acid diethylamide is a commonly used drug of teens. LSD is a hallucinogenic drug which affects the nervous system. The drug is ingested in many different ways, absorbed through the skin, taken orally or absorbed through the eye or ear. This drug was originally developed by the government of the United States…
On the rocky plateau of Giza, rise three great pyramids, each built during the lifetime of a pharaoh. Together, these pyramids constitute the most celebrated group of monuments in the world. While the pyramids at Giza were built in the Fourth Dynasty (2615-2500 BC), the first pyramid was actually built in Saqqara during the reign…