• Biology,  Human anatomy

    What is the function of Earwax in the Human Body?

    The earwax is very useful substance which keeps our ears healthy and is produced naturally in the ear. This wax is found not only in humans, but also in animals. It cleans, protects and lubricates the ears. Let us study through this article about earwax, its function etc. Important facts about Earwax 1. The scientific name of the earwax is cerumen. It is formed in the outer part of our ear canal where there are thousands of glands. It is sticky and shiny substance. It coats the ear to moisturize it and fight against infection.2. Earwax also prevents from dust, dirt, and insects from entering the ear.3. It also works like a natural antibiotic,…

  • Biochemistry,  Biology,  Cell biology

    CARBOHYDRATES

    Micromolecules – Monosaccharides and Oligosaccharides (Including Disaccharides) Macromolecules – Polysaccharides The micromolecules have the molecular weight of < 1000 Daltons whereas the macromolecules have > 1000 Daltons as molecular weight. The average carbohydrate requirement in an adult is ~ 400g per day which provides about 50-70% of total energy. Essential elements in the constitution of carbohydrate – C. H. O General Formula – *Cx (H2O)y (Containing more than one-OH groups). The polyhydroxy aldehydes or ketones can also be called as saccharides 80% of the dry weight of the plant is carbohydrate. There are 3-categories/classes  of carbohydrates: Monosaccharides Oligosaccharides Polysaccharides Monosaccharides They are simplest carbohydrates, with 3 to 7 carbon atoms.…

  • Biology,  Q & A,  Zoology

    Explain the excretory system in insects?

    Excretion Excretion is the process whereby an organism eliminates metabolic wastes and unwanted chemicals from its system. Metabolism is  the sum total of all the chemical reactions occurring in the cells and body. Some products of these metabolic reactions are toxic  and so must be processed or eliminated from the body. Others are simply materials that are present in excess and so must be  eliminated as waste. The process of excretion is quite different to defecation, which is the removal of undigested food wastes from  the gut. However, the gut of many animals also has a role in excretion as some materials may be excreted into the gut and  eliminated…

  • Biology,  Zoology

    SIGHT IN FISH

    While water is a better medium for the transmission of sound than air it is a much worse medium for the transmission of light. Basically, water absorbs light. This means that the further a ray of light travels through the water the weaker, or more attenuated it becomes. While we who live in the air can often see for several kilometres, sometimes even more than 20 km, a fish is lucky if it can see for 50 metres and generally it can see for far less than this. In muddy, algified or turbulent water visibility can often be measured in mere centimetres. Furthermore, because water absorbs light, the amount of…

  • Biology,  Botony,  MCQ

    MCQs ON KINGDOM FUNGI

    1. Lichens indicate SO2 pollution because of they (A) show association between algae and fungi (B) grow faster than others (C) are sensitive to SO2 (D) flourish in SO2 rich environment. Answer and Explanation: 1. (C): Lichens are found in Artie Tundra region where no other plant can grow. Lichens prefer to grow in pollution free environment. They are often used as an indicator of pollution and also they are very sensitive to SO2. They are first to die in a polluted environment (more SO2). 2. Absorptive heterotrophic nutrition is exhibited by (A) Algae (B) Fungi (C) Bryophytes (D) Pteridophytes Answer and Explanation: 2. (B): The true fungi or the eumycetes are special…

  • Biology,  MCQ

    BIOTECHNOLOGY

    Q1. Rules to explain “The phenomenon of inheritance of biological characteristics” was formulated by: A) T.H.Morgan  B) Gregor Johann Mendell C) Rudolf Virchow D) Bateson  E) Lamark Q2. Genetic research was activated and a revolution in modern biology occurred in the year: A) 1951-53 B) 1961-63 C) 1971-73 D) 1975-71 E) 1981-83 Q3. Genetic engineering  usually utilizes cells and plasmids of: A) Bacteria B) Viruses C) Algae D) Fungi E) Parasites Q4. “rDNA” is: A) Ribosomal DNA B) Riorazion DNA C) Resolution DNA D) Regenerate DNA E) Recombinant DNA Q5. DNA molecule into which a gene is inserted to construct a recombinant DNA molecule is: A) Activator  B) Initiator  C)…

  • Biology,  MCQ

    CELL BIOLOGY MCQ

    Q1: The diameter of most animal cells ranges from  A) 1.0 to 10 µm. B) 0.01 to 0.1 µm. C) 10 to 100 µm. D) 100 to 1000 µm. E) 0.1 to 1.0 µm. Q2: Which of the following is a feature found in BOTH prokaryotic and eukaryotic cells? A) extensive array of intermediate filaments B) multiple linear chromosomes in each cell C) ribosomes that accomplish protein synthesis D) mitotic spindles that partition chromosomes into the daughter cells E) All of the above are found in both types of cells. Q3. Knowing what you know about phospholipid bilayers; if you wanted to build your own membrane protein, what would your…

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