EV HSC Biology 1 3rd Chapter MCQ Question Answer. Cell Chemistry. The living cell is a symphony of thousands of chemical reactions all miraculously timed and coordinated to perform all the functions necessary for life. Amazingly, this symphony has only a few major players. Only six elements carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur (remember CHNOPS) make up about 98% of the mass of all living organisms. Carbon is a unique element with the remarkable ability to form strong, stable chemical bonds with other atoms.
Each carbon atom can form four bonds with other atoms. (Sometimes, two atoms will form more than one bond between themselves making a double bond or even a triple bond). HSC Question patterns suggestion and the question was distributed by the Board of Intermediate and Secondary Education, Dhaka. The Board of Intermediate and Secondary Education, Dhaka is an independent organization, accountable for the property of two public examinations (SSC & HSC) and credit of the newly created non-Govt. The educational organization, as well as of the management, controller and the development of these institutions.
EV HSC Biology 1 3rd Chapter MCQ Question Answer. Cell Chemistry
EV HSC Biology 1st Paper MCQ Question With Answer
Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development, and evolution. Botany, also called plant science(s), plant biology or phytology, is the science of plant life and a branch of biology.
The fields within biology are further divided based on the scale at which organisms are studied and the methods used to study them: biochemistry examines the fundamental chemistry of life; molecular biology studies the complex interactions of systems of biological molecules; cellular biology examines the basic building block of all life, the cell; physiology examines the physical and chemical functions of the tissues and organ systems of an organism, and ecology examines how various organisms interrelate.
A botanist, plant scientist or phytologist is a scientist who specializes in this field. Zoology is the scientific study of animals. This discipline can include animal anatomy, physiology, biochemistry, genetics, evolution, ecology, behavior, and conservation.
The proper function of human bodies is dependent on smaller structures, or organs, such as the heart or lungs. The tiny cells that make up these organs actually contain within them smaller structures called organelles. These organelles help the cells to perform their jobs. In cancer, changes to these organelles can cause the individual cells and ultimately the entire organism to have serious problems. To get a better understanding of how cells work, we will now spend some time examining some of these subcellular structures.
The organelles that we will discuss are involved in the information flow within cells and in energy production. In addition, we will look at a structure that gives cells their shape and allows them to reproduce themselves. All of the organelles and processes to be discussed have direct relevance to cancer because these are the cellular structures/activities that become disturbed in the disease.
The image below shows two living mouse cells. The mitochondria are colored red and the nuclei (with brightly stained chromosomes) are colored blue. The green colored region near the nuclei of the cells represents the Golgi apparatus, an organelle involved in the processing and packaging of molecules within the cell.
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