What are the differences between Active and Passive transport? Following are the differences between Active and Passive transport -: Criteria Active Transport Passive Transport Definition Movement of molecules or ions against the concentration gradient (low to high concentration). Movement of molecules or ions along the concentration gradient (high to low concentration). Energy Requirement Requires energy … Read more
What are Bacteria? Characteristics of Bacteria Structure of bacterial cell Upon observation under microscope several structural components are revealed outside and inside the cell wall. The various structures of a typical bacterial cell are: 1. Capsule Functions of capsule: 2. Flagella 3. Pili or Fimbriae 4. Cell wall Functions of cell wall: 5. Plasma membrane … Read more
What are the differences between Osmosis and Diffusion? Following are the differences between Osmosis and Diffusion -: Criteria Osmosis Diffusion Definition Movement of water molecules across a semipermeable membrane from a region of lower solute concentration to higher solute concentration. Movement of molecules (gas, liquid, or solid) from a region of higher concentration to lower … Read more
What are the differences between Prokaryotic and Eukaryotic cells? Following are the differences between Prokaryotic and Eukaryotic cells -: Criteria Prokaryotic Cells Eukaryotic Cells Cell Size Small (1-10 µm) Larger (10-100 µm) Nucleus Absent (nucleoid region present) Present (membrane-bound nucleus) Organelles No membrane-bound organelles Membrane-bound organelles present (e.g., mitochondria, endoplasmic reticulum) Chromosomes Single, circular chromosome … Read more
This article contains notes on Definition, Classification and Types of microorganisms:- Definition of Microorganisms Microbes or microorganisms are microscopic organisms (i.e., they are not visible to naked eye) that exist as unicellular, multicellular, or cell clusters. Microorganisms are widespread in nature (they make up almost 60% of the earth’s living matter) and are beneficial to … Read more
What is the difference between A, B and Z forms of DNA? Following are the differences between A, B and Z forms of DNA -: Criteria A-DNA B-DNA Z-DNA Helix Type Right-handed helix Right-handed helix Left-handed helix Helix Diameter 23 Å (Angstroms) 20 Å 18 Å Base Pairs per Turn 11 base pairs 10.5 base … Read more
What is Endocrine System? Endocrine System consists of ductless glands that control, communicate, coordinate and integrate various functions of all the body organs by secretions of chemical messenger called hormones. What is the difference between nervous and endocrine control? Nervous Control Endocrine Control 1. Works by the conduction of nerve impulses. Works by the … Read more
The system that controls and coordinates all the activities of various body parts in response to external and internal stimuli by the conduction of nerve impulses is called nervous system. Neuron or nerve cell It is the structural and functional unit of nervous system. A nerve cell with all its processes is called a neuron. … Read more
National Health Programmes in India National Malaria Eradication Programme (NMEP) – For the eradication of malaria. National Filaria Control Programme (NFCP) – For the eradication of filaria. National Smallpox Eradication Programme (NSEP) – For the eradication of smallpox. National Leprosy Control Programme (NLCP) – For controlling Leprosy. National Cholera Control Programme (NCCP) – For controlling … Read more
What is Circulatory System? The Human Heart Pericardium and wall-layers of the heart Structure of Human Heart Blood vessels entering and leaving the heart, their apertures and valves Blood vessels entering the heart Blood vessels leaving the heart Heartbeat Circulation of blood through the heart Double Circulation Double Circulation- The Blood has to pass atwice … Read more