Flagella and Motility Flagella and Motility Flagellar Ultra structure : – Flagellar Synthesis The Mechanism of Flagellar Movement 1. What is the average diameter of bacterial flagella?a) 2 nmb) 10 nmc) 20 nmd) 50 nmAnswer: c) 20 nm 2. Which type of bacteria has a single flagellum at each pole?a) Monotrichousb) Amphitrichousc) Lophotrichousd) PeritrichousAnswer: b) … Read more
Organization and role of microtubules and microfilaments a) Microtubules b) Microfilaments Actin Binding Proteins. MCQs on Microtubules and Microfilaments
The cytoskeleton The cytoskeleton is a network of protein filaments and tubules that provide structural support, shape, and organization to a cell. It also plays essential roles in cell movement, division, intracellular transport, and maintaining the cell’s integrity. The cytoskeleton is highly dynamic and constantly changes in response to the cell’s needs. It is composed … Read more
Protein Sorting: Targeting of Proteins to Organelles Protein Sorting: Targeting of Proteins to Organelles Protein sorting , Introduction of protein sorting Protein translocation Co-translational translocation Post translational translocation Sorting of proteins to mitochondria Sorting of proteins to chloroplasts Protein destruction MCQ’s Q1. Which of the following organelles receives proteins via co-translational translocation? [PYQ Type]a) Nucleusb) … Read more
Structure and Role of tRNA Structure and Role of tRNA 1. Primary Structure of tRNA These modifications are critical for the structural stability, proper folding, and functional interactions of tRNA during translation. Even in the linear (primary) structure, certain domains (or arms) of tRNA are functionally distinguishable due to the presence of modified bases: 1. … Read more
Mechanism of Translation, Initiation, Elongation and Termination Formation of Aminoacyl tRNA a) Activation of amino acid AA + ATP –ENZYME- (aa1-AMP) -Enz1 + PPi B) The transfer of amino acid to tRNA (aa1-AMP) Enz1 + t-RNA1 —— aa1- t-RNA1 + AMP + Enz1 Initiation of Polypeptide Initiation in eukaryotes Kozak’s ribosome scanning hypothesis for … Read more
RIBOSOME site of protein synthesis OCCURRENCE: Number: Structure: Ultrastructure of Ribosomes Types of Ribosomes 70S ribosomes: 80S ribosomes: Polyribosomes or Polysomes: Origin of ribosomes: Functions of Ribosomes. RIBOSOMAL RNA or rRNA On the basis of their sedimentation coefficient or rate of sedimentation, rRNA molecules may be classified into following categories: Structure of rRNA Function of … Read more
