Meiotic cell division (Meiosis), its stages and significance
What is meiosis? The term meiosis is derived from the Greek word ‘meioum’ which means to reduce. It is a special kind of cell division, […]
Cell biology
Mitotic cell division (Mitosis), its stages and Significance
What is cell division? Life of multicellular organisms starts from a single cell known as a zygote. An adult plant or animal contains millions of […]
Nitrogen fixation, its types and mechanism
What is nitrogen fixation? The phenomenon of conversion of free nitrogen into nitrogenous salts to make it available for absorption by plants is called nitrogen […]
Vacuoles: Structure, Types and Functions
Vacuoles are membrane bound cell organelles found almost in all the cells. They are small in animal cells whereas fungi and plants have large vacuoles. […]
Differences between Mitochondria and Chloroplasts
S.N. Mitochondria Chloroplasts 1. They are smaller in size (1-4 µm). They are bigger in size (4-10 µm). 2. They occur in practically all eukaryotic […]
Differences between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER)
S.N. RER (Rough ER) SER (Smooth ER) 1. It is composed mainly of cisternae. It is composed mainly of tubules and vesicles. 2. It bears […]
Differences between 70S and 80S ribosomes
S.N. Characteristics 70S Ribosomes 80S Ribosomes 1. Occurrence They occur in prokaryotic cells and in the mitochondria and plastids of eukaryotic cells. They occur only […]
Structure and Types of Animal egg cell or ovum
Egg cell or ovum, also known as female gamete is formed by the process of oogenesis in female organisms. They are produced by follicle cells […]
Cell cycle, its different phases and duration
Life starts as a single cell called zygote or fertilized egg in all multicellular organisms. Living organisms grow by addition of new cells that arise […]
Autophagy and the treatment of cancer
The word ‘autophagy’ is derived from the Greek words “auto” (meaning self) and “phagy” (meaning eating). In a healthy human body, cells are constantly […]