Structure of Haemoglobin: Haemoglobin is an aggregation of four globular proteins (typically two alpha and two beta subunits), each with an embedded haeme group. Each haeme group allows the binding of an oxygen molecule.
Here's another intriguing case from the Guinness World Records. In 1964, a 17-year-old high school student named Randy Gardner beat the world record for sleep deprivation by staying awake for 264 hours (11 days) without using any stimulants.
1. Guess how much sleep would be adequate-for most adults it would be 8 hours. 2. For a week (7 full days), set your alarm clock for the same time each day. 3. Go to bed at an hour that would let you get the number of hours you think you need. 4. Record when you go to bed and when you wake up. 5.