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RIBOSOME site of protein synthesis OCCURRENCE:  Number:  Structure:  Ultrastructure of Ribosomes Types of Ribosomes 70S ribosomes:  80S ribosomes:  Polyribosomes or […]

Nuclear mRNA Transport 1. Which of the following proteins is involved in the processing of hnRNA in the nucleus?A. Cap-binding

RNA Processing (1) 5′ capping (2) 3′ cleavage and polyadenylation (3) Splicing and RNA editing. (A) 5′ Capping (B) 3′

Eukaryotic transcription I. Pre initiation complex II. Promoter melting and open complex formation III. Abortive initiation IV. Promoter escape V.

Transcription in prokaryotes Initiation,  2. Elongation: 3. Termination: Rho independent or RNA based: Rho dependent or protein-based: Initiation Stage RNA

DAMAGE AND  REPAIR Introduction to DNA Damage and Repair: DAMAGE Types of Damage: Damage to DNA includes any deviation from

REPLICATION Semi-conservative replication of Chromosomes in eukaryotes: Theoretically, there may be following three possible modes of DNA replication: Semiconservative mode

A, B and Z forms Right handed DNA 1. ‘A’-DNA 2. B’-DNA or Right handed DNA 3. ‘C’-DNA and ‘D’-DNA

DNA STRUCTURE DNA STRUCTURE – Biochemical composition of DNA (1) A pentose sugar -the 5 carbon deoxyribose sugar (2)  2.

NUCLEOSOME ORGANIZATION Important points of this model are as follows: SOLENOID MODEL: Ubiquitination, acetylation, methylation and phosphorylation of histones in