Tag: science
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NATIONAL SCIENCE AND MATHS QUIZ PAST QUESTIONS AND ANSWERS-3
NATIONAL SCIENCE AND MATHS QUIZ PAST QUESTIONS AND ANSWERS-3 Find the values of the constants a and b if the straight lines 1. ax + 5y = 3, and 4x + by = 1 intersect at the point (2, -1) ANSWER: a = 4, b = 7 [2a – 5 = 3, 2a = 8,…
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Why do we have sweet tooth?
Looking at your tongue closely in the mirror you will see tiny bumps scattered on the surface. Inside these bumps are small structures called taste buds and inside the taste buds are cells called taste receptors. The taste receptors detect the presence of certain molecules and send messages to your brain about them. The sensed…
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Using Immobilised Enzymes
Enzymes, mainly from microorganisms, have been used indirectly for thousands of years in biotechnologies including brewing, baking, and making cheese and yoghurt. Many biotechnological processes still use whole microorganisms as their enzyme source. More recently they are also being used in isolation. Isolated enzymes Using isolated enzymes instead of whole organisms has some clear advantages.…
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Culturing microorganisms in the laboratory and on an industrial scale.
Culturing microorganisms in the laboratory To investigate microorganisms for the medical diagnosis of disease or scientific experiments you need to culture them. This often involves growing large enough numbers of microorganisms for us to see them clearly with the naked eye. Whenever microorganisms are cultured in the laboratory the correct health and safety procedures must…
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How smartphones work (sending, receiving messages and calls).
When we say phone today a little rectangular object that can connect to the internet and search for information, and contain messaging apps and social networks, comes to mind. But if you ever saw a telephone from the 1970s, you will wonder how it should be used. Before the telephone, there was the telegraph, a…
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The Basics of Analogue and Digital System.
The Basics of Analogue and Digital System. Engineers divide measurements into two kinds analogue and digital. Analogue things come in continuous measures, such as time, space, temperature, or speed. When you measure them, you can express the measurements in decimals. For instance, your body’s normal temperature is 37.5°C, acceleration due to the Earth’s gravity is…
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CHEMICAL ENGINEERING AND ITS IMPACT ON HUMAN LIFE.
What is Chemical or Process Engineering? Chemical or Process Engineering is a branch of engineering which applies the knowledge of chemistry, mathematics, physics, biology, and other scopes of science to develop economical technologies and industrial processes that can transform raw materials into useful products and energy to enhance the quality of human life (College Grad,…
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How to Become a Geoscientists.
What is Geoscience? We live on the planet Earth which resides in a Solar System made up of other planets and stars. The Earth provides for all our needs and sustains life. As we live our daily lives, develop, evolve, innovate, manufacture and construct, our activities impact the Earth. Humans and other living organisms depend…
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General Principles of Sterilization
General Principles of Sterilization Sterilization is a process that kills all forms of microbial life, including bacterial endospores. Many factors limit the success or degree of sterilization such as Organic load (organisms and other contaminating materials such as blood or body fluids), The type of organisms present, The concentration and exposure time to the germicide,…
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The Reaction Result From Mismatched Blood Transfusions.
The Reaction Result From Mismatched Blood Transfusions. A person’s blood type is determined by certain antigens found on the red blood cell surface. These antigens are clinically important because they must be matched between donor and recipient during a blood transfusion. ABO groups The protein–sugar complex on the surface of the red blood cells acts…
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Plant Nutritional Requirement Note; Elective biology for SHS.
Plant nutritional requirement Introduction. Plants are unique organisms that can absorb nutrients and water through their root system and carbon dioxide from the atmosphere. Soil quality and climate are the major determinants of plant distribution and growth. The combination of soil nutrients, water, carbon dioxide, and sunlight allow plants to grow. The majority of volume…
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Traditional/Indigenous Way of Soap Production.
Traditional/Indigenous Way of Soap Production. Content: Introduction Scientific principles involved in soap production. The steps involved in traditional soap is production Ways of improving the quality of traditional (local) soap The by-product of soap production. Effects of excess alkali in soap production Main stages in the modern manufacture of soap Similarities between indigenous and modern…
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Rabbit Production in Ghana.
Rabbit Production in Ghana. Content; Rabbit and its importance General characteristics of rabbits Some common breeds of rabbits How to select a good breed of rabbit for rearing Reproduction and taking care of rabbits from birth to maturity Diseases and pests that affect rabbits, and how to control them. Marketing of rabbit products Problems associated…
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Integrated Science for Senior High Schools, BIOTECHNOLOGY.
Integrated Science for Senior High Schools, BIOTECHNOLOGY. What is Biotechnology? Biotechnology is the use of living organisms to either make or change products to improve human life. It can also be defined as the industrial and commercial use of biological species (microbes or organisms) or biological processes to produce industrial products or services. Biotechnology can…
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