Neutron Classes

Neutron Classes

  • Joined: January 26, 2021
  • Articles: 1050

Griffith’s experiment

Griffith’s experiment Rough strain of Streptococcus was injected into the mouse. The mouse lived. Smooth strain of Streptococcus was injected into the mouse. The mouse died. When heat-killed smooth strain of Streptococcus was injected into the mouse, the mouse lived. In the last set of experiments,…

Molecular Basis Of Inheritance-Summary

Molecular Basis Of Inheritance – A good summary makes the whole chapter easy. 1 DNA, RNA and Search for Genetic Material The DNA DNA (Deoxyribonucleic acid) is a double-stranded, helical molecule. Its structure was cracked by Watson and Crick based on the X-ray crystallography results provided…

Application of human genome project

Application of human genome project 1. Disorders: More than 1200 genes are responsible for common human cardiovascular diseases, endocrine diseases (like diabetes), neurological disorders (like Alzheimers disease), cancers and many more. 2. Cancers: Efforts are in progress to determine genes that will…

Reverse transcription

Reverse transcription 1. Reverse transcription is the synthesis of DNA from an RNA template. 2. A class of RNA viruses, called retroviruses, are characterized by the presence of an RNA-dependent DNA polymerase (reverse transcriptase). 3. For example, the virus that causes AIDS, is…

Wobble hypothesis

Wobble hypothesis 1. Wobble hypothesis explains the phenomena of multiple codons coding for the code for a single amino acid. 2. According to this theory the base in the first position of the anticodon on tRNA is an abnormal base which…

Enzymes required for DNA replication

Enzymes required for DNA replication 1. DNA Polymerase – Elongates a new DNA strand at a replication fork. Adds nucleotides one by one to the new and growing DNA strand. 2. DNA ligase – Joins sugar-phosphates of Okazaki fragments. Okazaki fragments…

Clover -leaf model of t-RNA

Clover -leaf model of t-RNA 1. The structure of RNA was explained by cloverleaf in the cloverleaf model.2. It helps in providing the anticodon to the m-RNA template.3. They have several loops like aminoacyl binding loop, anticodon loop and ribosomal binding loop…

Nucleosome model

Nucleosome model 1. Woodcock stated that chromatin appears as a chromatin beads.2. These beads like structure were referred to as nucleosome.3. This nucleosome is composed of DNA and histone proteins.4. The central core is made up core histones H2A, H2B, H3,…

Molecular Basis Of Inheritance-Concept

Molecular Basis Of Inheritance – A quick revision tool for the grip on the chapter. 1 Nucleosome model 1. Woodcock stated that chromatin appears as a chromatin beads.2. These beads like structure were referred to as nucleosome.3. This nucleosome is composed…

Pedigree Analysis

Pedigree AnalysisInheritance of hundreds of characteristics such as colour blindness, hemophilia, polydactyly, attached earlobes and tongue rolling, have been studied generation after generation in particular families of human beings. In order to understand the pattern of inheritance, a family tree…

Down’s and Patau’s Syndrome

Down’s and Patau’s Syndrome Chromosomal abnormalities are responsible for miscarriages and stillbirths. Down’s syndrome and Patau’s syndrome are trisomy disorders, where the individuals have three copies of a chromosome rather than the normal two. Patau’s syndrome (Trisomy of 13th chromosome), is…

Klinefelter’s And Turner’s Syndrome

Klinefelter’s And Turner’s SyndromeKlinefelter’s syndrome(KS) (47XXY or XXY) and Turner’s syndrome(TS) (45X or X0) are common cases of sex chromosome aneuploidy (SCA). In humans, with an approximate occurrence of KS is 1 in 600 males and TS is 1 in 2,000 female livebirths. Let us understand the…

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