Amino acids are building blocks of proteins and each amino acid bind to its neighboring residue through a peptide bond. There are 20 main amino acids present in nature. Out of these, the asparagine was discovered first in the year 1806. The amino acid composed of an amino group, a carboxyl group, and R group … Read moreAmino acids : Classification and Properties
R Camerarius was the first to describe sexual reproduction in plants. The flower is the main reproductive part of the angiospermic plants. In which, pollen grain is male gametophyte and embryo sac is female gametophyte. The process of sexual reproduction is divided into three steps: Pre-fertilisationDouble fertilizationPost-fertilization Pre-Fertilization events in sexual reproduction in flower Important events of Pre-fertilization are:- Formation … Read moreSexual Reproduction in flowering plants
Genetic engineering is the process in which the new DNA manually added to an organism. Important enzymes involved in genetic engineering are:- Exonuclease The enzymes act upon genome and digest the base pairs on 5′ and 3′ ends of a single-stranded DNA or at single-strand nicks or gaps in double-stranded DNA. Endonucleases Endonuclease acts upon the … Read moreThese seven Enzymes are base of Genetic Engineering.
Garnier for the first time had described them as filamentous structure, ergastoplasm. They were first discovered by Claude (1951) under the electron microscope. The term ‘endoplasmic reticulum‘ was first coined by Porter et.al in 1945.E.R. is abundant in liver, pancreas and other actively synthesizing cells. E.R. is absent in RBC, ova, embryonic cells and prokaryotes. There … Read moreDifference between SER (smooth endoplasmic reticulum) and RER (rough endoplasmic reticululm)
The transfer of pollen grains from the anther to the stigma is called pollination. It is of two types:- 1. Self-pollination (autogamy) When the pollen grains of a flower falls on the stigma of the same flower, or of the different flower of the same plant, it is called self-pollination. It occurs not only in … Read moreSelf and Cross pollination are totally different or have some similarity?