General Knowledge

Below is a competitive-exam focused set on Sound, emphasizing everyday applications such as echo, SONAR, ultrasound, echolocation, noise control, megaphones, stethoscopes and Doppler effect. 1. An echo is produced mainly due to: (A) Refraction of sound(B) Reflection of sound(C) Absorption of sound(D) Diffraction of sound Answer: (B) Reflection of soundExplanation: An echo is the repetition … Read more

1. The angle of incidence is equal to the angle of reflection when light is reflected from a plane mirror. This is known as: (A) Law of refraction(B) Law of reflection(C) Law of dispersion(D) Law of diffractionAnswer: (B) Law of reflectionExplanation: According to the law of reflection, the angle of incidence equals the angle of … Read more

Five-Kingdom Classification 1. The five-kingdom classification was proposed by: (A) Carl Linnaeus(B) R.H. Whittaker(C) Charles Darwin(D) Gregor MendelAnswer: (B) R.H. Whittaker 2. Which of the following is not one of the five kingdoms? (A) Monera(B) Protista(C) Fungi(D) ArchaeaAnswer: (D) Archaea 3. Bacteria are generally placed in the kingdom: (A) Protista(B) Monera(C) Fungi(D) PlantaeAnswer: (B) Monera … Read more

1. Genetic engineering involves: (A) Natural selection of organisms(B) Direct manipulation of an organism’s genetic material(C) Only the study of fossils(D) Production of energy from foodAnswer: (B) Direct manipulation of an organism’s genetic material 2. Which molecule is usually manipulated in genetic engineering to introduce a desired trait? (A) DNA(B) Lipid(C) Starch(D) WaterAnswer: (A) DNA … Read more

Natural Selection & Darwin’s Theory 1. Who is most closely associated with the theory of evolution by natural selection? (A) Gregor Mendel(B) Charles Darwin(C) Louis Pasteur(D) Robert HookeAnswer: (B) Charles Darwin 2. Darwin proposed that organisms evolve primarily through: (A) Natural selection(B) Photosynthesis(C) Artificial fertilization(D) Binary fissionAnswer: (A) Natural selection 3. Natural selection occurs because: … Read more

Ecosystem 1. An ecosystem consists of: (A) Only living organisms(B) Only non-living components(C) Living organisms and their physical environment(D) Only plants and animalsAnswer: (C) Living organisms and their physical environmentExplanation: An ecosystem includes biotic components and abiotic factors such as water, soil, air, light and temperature. 2. Which of the following is an abiotic component … Read more

Asexual & Sexual Reproduction 1. Reproduction in which a single parent produces offspring without the fusion of gametes is called: (A) Sexual reproduction(B) Asexual reproduction(C) Fertilization(D) Cross-pollinationAnswer: (B) Asexual reproductionExplanation: Asexual reproduction involves a single parent and generally produces genetically similar offspring. 2. Which of the following is an example of asexual reproduction? (A) Fertilization … Read more

DNA & RNA 1. The hereditary material in most living organisms is: (A) Protein(B) DNA(C) Lipid(D) CarbohydrateAnswer: (B) DNAExplanation: DNA stores and transmits genetic information in most organisms. 2. The basic unit of DNA is called: (A) Amino acid(B) Nucleotide(C) Chromosome(D) GeneAnswer: (B) Nucleotide 3. Which nitrogenous base is present in DNA but not in … Read more

You can also check: MPSC PYQs for General Science Photosynthesis 1. Photosynthesis mainly takes place in which organelle of a plant cell? (A) Mitochondria(B) Chloroplast(C) Ribosome(D) Golgi apparatusAnswer: (B) ChloroplastExplanation: Chloroplasts contain chlorophyll and are the primary sites of photosynthesis. 2. Which gas is absorbed by green plants during photosynthesis? (A) Oxygen(B) Nitrogen(C) Carbon dioxide(D) … Read more

Carbohydrates, Proteins & Fats 1. Which nutrient is the body’s main immediate source of energy? (A) Protein(B) Fat(C) Carbohydrate(D) VitaminAnswer: (C) CarbohydrateExplanation: Carbohydrates are generally the body’s primary and readily available energy source. 2. Which of the following is a simple sugar? (A) Glucose(B) Starch(C) Cellulose(D) GlycogenAnswer: (A) Glucose 3. The storage form of carbohydrate … Read more