EducatorSharmin

  Cell Structure Chapter - 1 A' Level Q/A         Q.1. What is cell?           Ans: A cell is a unit of life. It consists of a mass of living matter called protoplasm. Q.2. What is protoplasm? Ans:  Protoplasm is a complex jelly-like substance in which endless chemical activities are carried out that ensure the life of a cell. Q.2. What is cell biology? Ans: The study of cells has given rise to an important branch of biology known as cell biology.  Q.3. Name the structures that animal and plant cells have in common, those found in only plant cells, and those found only in animal cells. Ans: In animals and plants each cell is surrounded by a very thin  cell surface membrane . This is also sometimes referred to as the plasma membrane . Many of the cell contents are colourless and transparent so they need to be seen. Each cell has a nucleus , which is a relatively large structure that stains intensely and is therefore very co...

      Biological Molecules In biology, certain molecules are essential for life. These molecules—carbohydrates, proteins, lipids and nucleic acids —are the building blocks of cells and are involved in nearly every function that supports life. Simplified versions are shown opposite. Learning Objects: * How large biological molecules are made from smaller molecules * Describe the structure & function of carbohydrates , lipids and proteins * Carry out biochemical tests to identify carbohydrates, lipids & proteins * Explain some key properties of water that make life possible. Q.1. What is macromolecule?   Ans: A macromolecule is a large biological molecule such as a protein, polysaccharide or nucleic acid. There are 3 types of macromolecule in living organisms-  1) polysaccharides 2) proteins 3) nucleic acids            Q.2. What is monomer?  Ans: A monomer is a relatively simple molecule which is used as a basic building...