Definition, Classification and Types of Microorganisms

Definition, Classification and Types 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 life, but some can cause serious harm.

Differences between A, B and Z forms of DNA

Difference between A, B and Z forms of DNA

DNA exists in multiple structural conformations, of which the A, B, and Z forms are the most well-known. These forms arise due to variations in helical structure, environmental conditions, and sequence-specific factors. Each form exhibits unique properties that significantly influence DNA’s biological function, adaptability, and interactions with proteins and other molecules. Understanding these differences is essential for insights into DNA’s role in genetic regulation, stability, and evolution.

Differences between DNA and RNA

Differences between DNA and RNA

What are the differences between DNA and RNA? Following are the differences between DNA and RNA -: Criteria DNA (Deoxyribonucleic Acid) RNA (Ribonucleic Acid) Full Form Deoxyribonucleic Acid Ribonucleic Acid Sugar Deoxyribose Ribose Structure Double-stranded (helix) Single-stranded Nitrogenous Bases Adenine, Thymine, Cytosine, Guanine Adenine, Uracil, Cytosine, Guanine Location Nucleus (mainly), Mitochondria Cytoplasm, Ribosome, Nucleus Function … Read more

Endocrine System

Endocrine System: Pituitary Gland diagram showing the two lobes of Pituitary gland

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.

Hepatic portal System

Hepatic Portal System diagram

All the portal veins that carry their contents into liver collectively constitute the Hepatic Portal System.

Human Excretory System

L.S. of Kidney of Man

The process of removal of chemical waste (mainly nitrogenous) from the body is known as excretion and the organ system involved is called Excretory System.

Human Population

Human Population

Population may be defined as a group of organisms belonging to one species which occupy a given area at a given time.

Blood Group

Types of Blood Groups

Blood group, also known as blood type, is a group of types of blood based on the presence and absence of blood group antigens in the surface (membrane) of the RBCs, and antibodies on the plasma.

Human Circulatory System

Human Circulatory System- The Heart

All the parts of the body that help in the transportation of various materials in the body, collectively constitute the Circulatory System.