Science MCQs

General science MCQs with Answers  1) Identify the vector quantity from the following : A) Heat B) Angular momentum  C) Time D) Work 2) Potassium permanganate is used to purify water as it is - A) Sterilizing  B) Oxidizing   C) Reducing  D) Leaching  3) Which can bind O₂ molecules? A) Red blood cells   B) White blood cells  C) Vitamin B₁₂ D) Vitamin E 4) LPG is a mixture of - A) Methane and butane  B) Propane and butane  C) Ethane and propane  D) Ethane and butane  5) Find the odd one out - A) Zoology  B) Physiology  C) Botany  D) Philosophy   6) The scale used for measuring the intensity of the earthquake is: A) Metric scale  B) Quake scale  C) Richter scale   D) Epicenter scale  7) Plants receive nutrients from - A) Atmosphere  B) Chlorophyll  C) Soil D) Light 8) Which one is a fertilizer? A) N₂ B) O₂ C) P₂ D) NaNO₃ 9) The speed of an ant is 75 cm/sec.The ant travels in a day ...

   1) India has the largest deposits of __?__ in the world. Ans: Mica 2) The gases used in different types of welding would include — Ans: Oxygen and Acetylene 3) Fathometer is used to measure — Ans: oceans depth  4) India's integrated missile development programme was started in — Ans: 1983 5) Grand Central Terminal, Park Avenue, New York is the world's largest — Ans: railway station 6) International tiger day celebration in — Ans: July 29 7) World forestry day is celebrated at — Ans: 21st march 8) Durand cup is associated with — Ans: Football  9) Which of the following metals form an amalgam with other metals? Ans: Mercury  10) Who was Guru Govinda Singh? Ans: 10th Sikh guru and the founder of Khalsa the inner council of Sikhs in 1699  11) Fuel used in thermal powerplants is — Ans: Fossil fuels 12) The powerplant which converts pose potential energy of falling water into electricity is — Ans: Hydroelectric powerplants  13) Which are two main alcohols...

Enzyme :  Enzymes are proteins that act as biological catalysts (biocatalysts). Catalysts accelerate chemical reactions.  Substrates and products :   The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.  An enzymatic reaction in a living cell First discovered enzyme:   In 1833 Anselme Payen discovered the first enzyme Diastase, which is any one of a group of enzymes that catalyses the breakdown of starch into maltose. Different parts of enzymes:   The main two parts of enzymes are apoenzyme and cofactor.   1) Apoenzyme    Apoenzyme is the protein part of an enzyme.  2) Cofactor   A cofactor is the protein less part of the enzyme.  I) Organic part of cofactors:  I-a) Prosthetic group  When the protein less part of the enzyme is tightly attached with protein then it is called a prosthetic group.  I-b) Coenzyme ...