Caspases

are so named because they contain a key cysteine residue in the catalytic site and selectively cleave proteins at sites just C-terminal to aspartate residues

TLS Online TPP Program

#Id: 7800

#Unit 2. Cellular Organization

The principal nuclear transport receptor of mRNPs out of the nucleus is :

A. mRNP exporter

B. Nuclear export factor 1 (NXF1)

C. Nuclear export transporter 1 (NXT1)

TLS Online TPP Program

#Id: 5904

#Unit 3. Fundamental Processes

A new model for the structure of the DNA Pol III complex proposes a three-polymerase core structure, with two Pol III catalytic cores responsible for synthesis of the lagging strand and one for the leading strand.

TLS Online TPP Program

#Id: 4639

#Unit 13. Methods in Biology

Flow cytometry or FACS is the sine qua non (without which, nothing) of the modern immunologist’s toolbox.

Flow cytometry is based on light scattering and fluorescence 

Forward light scattering detect shape and side scattering detects granularity and complexity of the cell

TLS Online TPP Program

#Id: 10274

#Unit 6. System Physiology – Plant

Changes in osmotic potential of guard cells required for stomatal opening in the morning are mediated by potassium and its counterions, whereas the afternoon changes are mediated by sucrose.

TLS Online TPP Program

#Id: 9821

#Unit 6. System Physiology – Plant

A brief pulse of red light will induce a response, provided that the light is sufficiently bright, and conversely, very dim light will work if the irradiation time is long enough. 

This reciprocal relationship between fluence rate and time is known as the law of reciprocity