An average Human cell (diploid) contains about 6.4 billion base pairs of DNA divided among 46 chromosomes. The length of each base pair is about 0.34 nm. Therefore, if the DNA molecule in a diploid cell were laid out end to end, the total length of DNA would be approximately 2 meters. Continue reading How a 2 meters long DNA is fitted into a 2 micrometers Nucleus?
It is a well-known fact that DNA acts as a genetic material in most of the organisms on this planet earth. However, it is also clear that RNA also acts as a genetic material, but only in some viruses (for example, Tobacco Mosaic Viruses, QB Bacteriophage, etc.).
Continue reading Why Nature Preferred DNA over RNA?
Antibiotics have been around for many years and if your baby is 3 years or few months old then it is evident that you may get confronted to antibiotics 4 to 5 times in a year and may have fears and doubts about antibiotics. Moreover, many of you may have a habit of taking antibiotics on an old prescription. These habits are not good for your baby’s health. However, if antibiotics are used wisely, they can provide significant benefits.
All the developmental processes occurring in plants involve growth. The growth of plants involves various changes such as the addition of new cells through cell division, an increase in its size and weight, and an irreversible increase in the volume. Therefore, we can define the term growth as a permanent and irreversible change in the size of a cell, organ or whole organism usually accompanied by an increase in its dry weight. Continue reading What are different factors that affect the growth of plants?
A freshly hatched tadpole larva has a limbless body divide into an ovoid head, a short trunk, and a slender tail. At this stage, there is no mouth and as a result, it cannot take anything from outside. Most of the nutrition is provided by the yolk material. The exchange of gases takes place in three pairs of highly vascular and feathery external gills. Continue reading How does a Tadpole change into a Frog?
Enzymes are complex biological molecules which catalyze or greatly speeds up the rate at which a chemical reaction will occur. They are primarily proteins, but some enzymes, called ribozymes, are made of RNA. The key concept behind the speeding up of a chemical reaction by an enzyme is that it reduces the activation energy required for a reaction. In doing so, it speeds up the reaction. Continue reading How Enzymes speed up the chemical reactions?
Nature has created many beautiful masterpieces, but a butterfly is the most beautiful and colorful masterpiece. The vivid colors of butterfly wings are so life like that sometimes people call them “flying flowers”. Do you know, these colorful creatures actually belong to the insect family of the animal kingdom. Here are some amazing facts about butterflies that may surprise you.
The Pituitary Gland is located in a bony cavity called Sella turcica and is attached to the hypothalamus by a hypophyseal or infundibular stalk in front of the pons. It consists of three lobes: Anterior lobe, Intermediate, and Posterior Lobe. These three lobes produce nine different types of pituitary hormones. Continue reading What are various Hormones produced by Pituitary Gland?