Practice MCQ Questions and answers on Biology-GK

Guava has a rich source of vitamin C, A and E. Guava is called the super fruit because it is said to contain four times more vitamin C than orange and three times more proteins and four times more fibre than pineapple. It is also said to have more potassium than a banana.

Vitamins are micro nutrients.

Vitamin D is a hormone the kidneys produce that controls blood calcium concentration and impacts the immune system. It is also known as calcitriol, ergocalciferol, calcidiol and cholecalciferol. Of those, calcidiol is the form doctors most commonly focus on when measuring vitamin D levels in the blood.

The water-soluble vitamins include ascorbic acid (vitamin C), thiamin, riboflavin, niacin, vitamin B6 (pyridoxine, pyridoxal, and pyridoxamine), folacin, vitamin B12, biotin, and pantothenic acid.

Lathyrism is a disease caused by eating seeds of species of Lathyrus (the grass pea), mainly L. sativus (the chickpea or khesari).

Vitamin K is necessary for blood clotting.

Structurally, the vast majority of enzymes are proteins. Also RNA molecules have catalytic activity (ribozymes). Coenzymes are small nonprotein molecules that are associated to some enzymes.

The most common cause of rickets is a lack of vitamin D or calcium in a child's diet.

Vitamin B12 act as coenzymes.

Amoeba takes its nutrition through a process called phagocytosis where the entire organism swallows the food it plans on eating up. The mode through which an amoeba engulfs nutrition is known as holozoic nutrition.