You have three samples of different enzymes, but somehow, their labels got lost. Your job is to figure out which enzyme is in each tube. Read about the three enzymes that are in the tubes. Then, move on to the next page to carry out your investigation and get those labels back on the right tubes! Salivary amylase is an enzyme component of saliva. The pH of saliva is between 6.5 and 7.5. The temperature in the mouth is close to internal body temperature, about 37°C.

Pepsin is an enzyme released by cells of the stomach. The stomach contents have a pH of 1.5–3.5, and normal internal body temperature.

Thermophilic bacteria thrive in hot springs, with temperatures at or near the boiling point of water (100°C). The pH of the hot springs these bacteria were taken from varies between 6 and 8.

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

Where can dna be found in a prokaryotic cell