Chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell states and progenitor differentiation through endocrine, paracrine, or juxtacrine mechanisms. These signaling factors:

TLS Online TPP Program

#Question id: 12482

#Unit 2. Cellular Organization

The Rb protein has been called the “master brake” of the cell cycle. How the Rb protein acts as a cell cycle brake?

TLS Online TPP Program

#Question id: 6584

#General Aptitude

find the missing letter

A    ?   Q    E

C    M   S    C

E    K    U   A

G    I    W   Y

TLS Online TPP Program

#Question id: 10140

#Unit 6. System Physiology – Plant

Following are certain statements regarding activated and inactivated form of Rubisco, Which one is INCORRECT?

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#Question id: 13212

#Unit 6. System Physiology – Plant

The water at the top of a tree develops a large tension (a negative hydrostatic pressure), and this tension pulls water through the xylem this mechanism is called ,

TLS Online TPP Program

#Question id: 34117

#Unit 2. Cellular Organization

A. In the solenoid model, the nucleosomal DNA forms a superhelix containing approximately six nucleosomes per turn

B. In the solenoid model, the linker DNA is buried in the center of the superhelix, but it passes through the axis.

C. Zigzag conformation requires the linker DNA to pass through the central axis of the fiber in a relatively straight form

D. Zigzag conformation the nucleosomal DNA forms a superhelix containing approximately four nucleosomes per turn

Which of the following is correct