Practice MCQ Questions and answers on Biology-GK

Your stomach has a nifty way of digesting proteins and it's called stomach acid, though you might know it as gastric juice or simply acid. It mainly consists of hydrochloric acid, a potent chemical produced by the cells lining the stomach (parietal cells) and your gastric glands.

Gastrin is a digestive hormone.

Premolar teeth are lacking in herbivorous animal.

The digestive system is made up of the alimentary canal (also called the digestive tract) and other organs, such as the liver and pancreas. Alimentary canal runs from mouth to anus.

The longest part of the alimentary canal, the small intestine is about 3.05 meters (10 feet) long in a living person (but about twice as long in a cadaver due to the loss of muscle tone).

Trypsinogen is the precursor form (or zymogen) of trypsin, a digestive enzyme. It is produced by the pancreas and found in pancreatic juice, along with amylase, lipase, and chymotrypsinogen.

Leprosy is a chronic bacterial infection. It affects the skin and various nervous systems of the body, particularly the peripheral nerves. Leprosy is more common in tropical and subtropical areas. The disease is curable through multi-drug therapy.

The transmission of HIV requires contact with a body fluid that contains the virus or cells infected with the virus. HIV can appear in nearly any body fluid, but transmission occurs mainly through blood, semen, vaginal fluids, and breast milk.

Typhoid is caused by bacteria and spread through faecal matter by houseflies.

Lymphocytes are destroyed in AIDS.