Graphic Software and Multimedia Software

Graphic and Multimedia Software Graphics software is used to create, manipulate and print graphics. It is also known as digital imaging software. A graphic can be any picture, drawing, sketch, photograph, image or icon that appears on computer screen. Some graphics software can be used only with a particular type of graphic but some allow multiple graphics formats. Engineers, architects ...

Read More »

Application Software Type, Advantages and Disadvantages

Application Software Application software is used to perform various applications or tasks on the computer. Today, a wide variety of application software is available to meet any user need. Individuals and businesses use application software to perform hundreds of tasks such as: Writing letters Making presentations Managing finances Managing business inventory Preparing tax returns Designing and editing images Accessing the ...

Read More »

CONTROL OF BACTERIA NOTES

CONTROL OF BACTERIA Microorganisms can be controlled by various methods. Physical Methods Many physical methods are applied to prevent bacteria. For example steam, dry heat, gas, filtration and radiation. The process in which we use physical agents to control bacteria/microorganism is known as sterilization process. Sterilization is destruction of all life forms. High Temperature Treatment: High temperature is used in ...

Read More »

GROWTH AND REPRODUCTION IN BACTERIA NOTES

GROWTH AND REPRODUCTION OF BACTERIA Bacterial Growth: The increase in number of bacterial cells is called as bacterial growth. This increase in number occurs by asexual reproduction. Asexual Reproduction: In bacteria asexual reproduction occurs by means of binary fission. Binary Fission: The division of a prokaryotic cell into two identical daughter cells is called as binary fission. Following processes occur ...

Read More »

NUTRITION OF BACTERIA

NUTRITION IN BACTERIA Why Nutrition / Energy Required? Like other organisms bacteria need nutrition (energy) for their growth, maintenance and reproduction. CLASSIFICATION OF BACTERIA ON THE BASIS OF NUTRITION: On the basis of nutrition bacteria are of two types which are heterotrophic and autotrophic. Heterotrophic Bacteria They cannot synthesize their organic compounds from simple inorganic substances. Most bacteria are heterotrophic. ...

Read More »

GRAM STAINING TECHNIQUE OF BACTERIA

Gram Stain Technique on the Basis of Differences in Cell Wall Christian Gram developed the technique of gram stain on the basis of differences in the cell wall. On the basis of this technique bacteria can be divided into two groups: Gram Positive Bacteria: These are the group of bacteria that stained purple. They retain the primary dye due to ...

Read More »

BACTERIA SHAPES, SIZE AND CELL STRUCTURE NOTES

KINGDOM PROKARYOTAE (MONERA) Kingdom Prokaryotae / Monera consists of organisms with prokaryotic cells. In Greek the word Pro means “before” and karyon means nucleus. So prokaryotes are cells that do not have true nucleus structure. It mainly includes bacteria. Microbiologists place bacteria in two major groups. Eubacteria (In Greek it means “true bacteria”) Archaeobacteria (In Greek it means “ancient bacteria”). ...

Read More »

The Variety of Life

  The word virus is derived from Latin word venome which means poisonous fluid. Virus can be defined as: Non-cellular, submicroscopic infectious agents which contain either RNA or DNA, enclosed by proteinaceous coat, and reproduce only in living cells (obligate intracellular parasites). Viruses use biosyntheticmachinery of the host to make their materials and then transfer to other cells. Study of ...

Read More »

Facts About Cells

General Information on Cell The Polysaccharides in bacterial cell wall and cellulose in plant cell wall are carbohydrates. The living content of the cell is called protoplasm. The protoplasm of a eukaryotic cell is divided into nucleus and cytoplasm. The material present in between the plasma membrane and the nuclear membrane is called cytoplasm. Cytoplasm is formed by an aqueous ...

Read More »

RIBOSOMES, GOLGI COMPLEX, MITOCHONDRIA, CENTRIOLES

RIBOSOMES Ribosomes were discovered by Palade in 1955. Ribosomes are small, dense organelles, about 20 nm in diameter, present in great numbers in the cell. Most are attached to the surface of RER but they can occur free in the cytoplasm. Ribosomes are made from a combination of rRNA and protein. Eukaryotic ribosomes are composed of an equal quantity of ...

Read More »