NUCLEAR ENVELOPE
rubabNuclear envelope encloses the nucleus. So it separates nuclear contents from the cytoplasm. It is continuous with the ER at number of points. Structure .1.1ic nuclear envelope is composed of…
NUCLEUS
Nucleus contains most of the genes that control the cell. It is the most conspicuous organelle in the Eukaryota cell. Its average diameter is about 5. It performs two major…
Objectives & Fill in the blanks of Molecular Genetics
Multiple Choice Questions (MCQs) The model of DNA replication in which one strand is conserved and other is synthesized is: (a) Conservative (b) Semi-const rvative(c) Dispersive (d) None In semi-conservativt…
Subjective & Short Questions of Molecular Genetics
SUBJECTIVE QUESTIONS 1-Describe process of DNA replication. Discuss nature of gene. Write note on genetic code. Describe transcription. Describe process of protein synthesis. Describe regulation of gene expression in prokaryotes.…
Definition & key points of Molecular Genetics
TERMS DEFINITIONS Semi- conservative replication The replication in which one strand of the DNA is conserved and the other strand is synthesized according to complementary base pairing is called semi-conservative…
CONTROL OF GENE EXPRESSION IN EUKARYOTES
The expression of gene can be controlled at different levels in the eukaryotes. Transcriptional Control of Gene Expression The RNA synthesis depends on RNA polymerase enzymes. Numerous proteins called transcription…
REGULATION OF GENE EXPRESSION
IN PROKARYOTES (LAC OPERON) In bacteria, expression of gene is controlled at transcription level. Operon model of control of gene expression was described by Francois Jacob and Jacques Monod in…
TRANSLATION
The synthesis of protein at the ribosomes form mRNA is called translation. Role of tRNA in Translation Transfer RNA (tRNA) plays an important role in translation. It reads codes on…
TRANSCRIPTION
The synthesis of messenger RNA from DNA is called transcription. The genetic information in DNA is not translated directly into proteins. These information are first transcribed into mRNA. Many enzymes…
Genetic Codes – Characteristics , definition , table & chart
The genetic code is a sequence of three bases—a triplet code. DNA must code for the 20 different amino acids. DNA has information carrying capabilities. These information are present in…