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Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Structure of cholesterol and steroid hormones derived from cholesterol Structure of cholesterol and steroid hormones derived from cholesterol
Synthesis and major functions of the chief steroid hormones in animals. Synthesis and major functions of the chief steroid hormones in animals.
Regular Ways to Fold the Polypeptide Chain Regular Ways to Fold the Polypeptide Chain
Adding fiber to the diet Adding fiber to the diet
A gene encodes an RNA, which can encode a polypeptide. A gene encodes an RNA, which can encode a polypeptide.
Polypeptide Structure Polypeptide Structure
Video: Role of transport in a cell

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