Test : Biology - 4 - NDA MCQ

Oncogenes were first discovered as cancer-causing viruses, they also are found in all normal cells. The original, unmutated wild-type allele of an oncogene is known, strictly, as the proto-oncogene. The mutant versions are the cancer-causing oncogenes.

Panthera Tigris is the scientific name of Tiger.

The skull consists of 8 cranial bones and 14 facial bones.

Halophytes are plants adapted to saline soils, and occur naturally in environments ranging from maritime estuaries to remnant salt lakes in arid zones.

Prothrombin, responsible for clotting of blood is released by Blood Platelets.

Quinine is a major drug used to treat malaria. Quinine is extracted from the bark of Cinchona tree.

Lycopene pigment, which is a red color carotene, is responsible for the redness of tomato.

The law of Inheritance was discovered by Gregor Johann Mendel. He is known as the father of genetics.

The acid produced by ants is called formic acid. Chemically it is a simple carboxylic acid.

Viticulture is the science, production, and study of grapes.

Cro-Magnon is a common name that has been used to describe the first early modern humans.  However, recent research suggests that the physical dimensions of so-called “Cro-magnon” are not sufficiently different from modern humans to warrant a separate designation.

Chillies are valued principally for their high pungency and colour. Pungency in chillies is due to the active constituent “Capsaicin” an alkaloid which is extracted from chillies and is used to the medicine.

Chloroplast is considered as cell within a cell because it contains its own DNA. Hence, it is a semiautonomous organelle. It helps in photosynthesis.

Encephalitis virus is the causing factor of Japanese encephalitis.

Near-sightedness or myopia as it is medically termed is a vision condition in which close objects are seen clearly, but objects faraway appear blurred. It can be corrected by wearing concave or divergent lenses.

The small intestine consists of three parts. The first part, called the duodenum, connects to the stomach. The middle part is the jejunum. The third part, called the ileum, attaches to the colon.

Necrosis is the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.

Platelets are tiny cell fragments that are found within our blood. Whenever there is a cut the activated platelets continue to arrive on the scene through the bloodstream. They stick together and become caught in the web of fibrin. Platelets are compulsory for blood coagulation.

Copper Sulphate is a fungicide used to control bacterial and fungal diseases of fruit, vegetable, nut and field crops. It is chemical used for destroying fungi in water tanks.

Parthenocarpy is the natural or artificially induced production of fruit without fertilization of ovules, which makes the fruit seedless. Banana is a parthenocarpic fruit.