General Science Questions (MCQs) for Competitive Exam

Correct Answer : A
Explanation :

1. Pancreatic juice contains a lipase enzyme, which decomposes emulsified fats.

2. Lipase: It is an enzyme found in pancreatic juice and responsible for the breakdown of emulsified fats.

Correct Answer : A
Explanation :

Metals are electropositive elements because they tend to lose electrons easily. In chemical reactions, metals readily give away their outer electrons to form positive ions, making them good conductors of electricity and heat. This electron loss leads to the formation of cations, which contribute to the electropositive nature of metals.

Correct Answer : B
Explanation :

Manikya, also known as ruby, and sapphire are gemstones that are forms of the mineral corundum. Corundum is not an oxide but rather a crystalline form of aluminum oxide (Al₂O₃). Both ruby and sapphire are varieties of corundum, with ruby being red due to the presence of chromium impurities, and sapphire coming in various colors, except red (which would be classified as ruby), often due to different trace elements.

Correct Answer : C
Explanation :

An amphoteric oxide is a type of oxide that can act as both an acid and a base. This means it can react with both acids and bases, either accepting or donating protons (H⁺ ions) depending on the pH of the solution. Amphoteric oxides exhibit this dual behavior because they have both acidic and basic properties. Aluminum oxide (Al₂O₃) and zinc oxide (ZnO) are examples of common amphoteric oxides.

Correct Answer : D
Explanation :

All of the following are matched. 

(A) DPT - Vaccine

(B) DOTS - Tuberculosis 

(C) Adrenaline - Hormone

Correct Answer : C
Explanation :

 Protein synthesis takes place in the cell on ribosomes. Ribosomes are cellular structures composed of RNA and proteins, and they are the sites where amino acids are linked together to form proteins, following the instructions encoded in messenger RNA (mRNA) molecules. This process, called translation, is a fundamental cellular mechanism essential for the synthesis of various proteins necessary for the functioning of the cell and the organism as a whole. Ribosomes can be found both in the cytoplasm of the cell and attached to the endoplasmic reticulum in eukaryotic cells.

Correct Answer : C
Explanation :
Agni Neerja disease is caused by the Yellow Vein Mosaic Virus (YUMA). It is not usually sap transmissible, but it has been transmitted by grafting under experimental conditions.

Correct Answer : D
Explanation :

Correct Answer : C
Explanation :

soybeans contain the highest amount of protein. Soybeans are a complete protein, meaning they provide all nine essential amino acids that the human body cannot produce on its own. Other high-protein vegetables include lentils, chickpeas, black beans, and green peas. Including a variety of these plant-based protein sources in your diet can contribute significantly to your protein intake.

Correct Answer : C
Explanation :

The botanical name of the mango is Mangifera indica. It is a species of flowering plant in the sumac and poison ivy family, Anacardiaceae. Mangoes are widely cultivated for their edible fruit and are native to South Asia but are now grown in many parts of the world.