Paracellular Pathway

Water and solutes can be transported between the cells by moving across the tight junctions and intercellular spaces.

TLS Online TPP Program

#Id: 5700

#Unit 7. System Physiology – Animal

The anterior pituitary secretes six peptide hormones: 

TSH, FSH, LH, GH, prolactin, & ACTH

TLS Online TPP Program

#Id: 2843

#Unit 13. Methods in Biology

Recovery of proteins using (6His-Tag) and (Ni-NTA) chromatography columns.

TLS Online TPP Program

#Id: 6437

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 2349

#Unit 3. Fundamental Processes

RNA polymerase starts most transcripts with an A, and that ribonucleotide binds the template nucleotide (T) with only two hydrogen bonds (as opposed to the three between C and G).

TLS Online TPP Program

#Id: 6302

#Unit 3. Fundamental Processes

During abortive Transcription, RNA Polymerase Remains Stationary and Pulls Downstream DNA into Itself RNA polymerase produces and releases short RNA transcripts of 10 nucleotides (abortive synthesis) before escaping the promoter, 

 

During abortive Transcription, RNA Polymerase Remains Stationary and Pulls Downstream DNA into Itself

RNA polymerase produces and releases short RNA transcripts of 10 nucleotides (abortive synthesis) before escaping the promoter, entering the elongation phase, and synthesizing the proper transcript. It has long been unclear how the enzyme’s active site translocates along the DNA template during initial abortive cycles of transcription. Three general models were proposed:- “transient excursion”, “Inchworming”, “Scrunching”