A random variable has a probability distribution, which defines the probability of its unknown values. Random variables can be discrete (not constant) or continuous or both.

TLS Online TPP Program

#Id: 10323

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 8526

#Unit 2. Cellular Organization

Polyglutamylation and polyglycylation are likely mutually exclusive, so they would not normally occur at the same time & both can enhance microtubule stability,

TLS Online TPP Program

#Id: 2334

#Unit 3. Fundamental Processes

The E. coli rrn  promoters are also regulated by a pair of small molecules: the initiating NTP (the iNTP) and an alarmone,  guanosine 5 -diphosphate 3-diphosphate (ppGpp). 

1. An abundance of iNTP indicates that the concentration of  nucleotides is high, and therefore it is appropriate to synthesize plenty of rRNA. 

2. Accordingly, iNTP stabilizes the open promoter complex, stimulating transcription. 

3. On the other hand, when cells are starved for amino acids, protein synthesis cannot occur readily and the need for ribosomes (and rRNA) decreases. 

TLS Online TPP Program

#Id: 465

#Unit 2. Cellular Organization

Introns have negative Fold Potential i.e. potential to form stem loop.

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#Id: 2457

#Unit 13. Methods in Biology

In electrophoresis because of the varying charges and masses, of different molecules and particles of a mixture will migrate at different velocities under uniform force and will thus be separated into single fractions.