In banana, ripening is characterized by a climacteric rise in

respiration rate, as evidenced by the increased CO2 production.

A climacteric rise in ethylene production precedes the increase in CO2 production, suggesting that ethylene is the hormone that triggers the ripening process.

TLS Online TPP Program

#Id: 7001

#Unit 5. Developmental Biology

When a multipotent stem cell divides asymmetrically, its maturing daughter cell often goes through a transition stage as a progenitor or transit-amplifying cell, as is seen in the formation of blood cells, sperm, and neurons.

TLS Online TPP Program

#Id: 8294

#Unit 1. Molecules and their Interaction Relevant to Biology

Hyperbolic graphs

 

TLS Online TPP Program

#Id: 6761

#Unit 3. Fundamental Processes

Cytoplasmic mRNAs are degraded by one of the three pathways. For most mRNAs, the deadenylation-dependent pathway is followed These dense regions of cytoplasm contain the decapping enzyme (DCP1/DCP2), activators of decapping (DHH, PAT1, LSM1-7), and the major 5′→3′ exoribonuclease XRN1, as well as densely associated mRNAs

TLS Online TPP Program

#Id: 7873

#Unit 1. Molecules and their Interaction Relevant to Biology

A nonenzymatic reaction occurs between glucose and primary amino  groups in hemoglobin (either the amino-terminal Val or the ´-amino -amino groups of Lys residues) forms GHB

TLS Online TPP Program

#Id: 6399

#Unit 2. Cellular Organization

trp operon can run even in the presence of repressor. The attenuation system permits another 10-fold control over the operon’s activity.  Thus, the combination of repression and attenuation controls the operon over a 700-fold range, from fully inactive to fully active: (70-fold [repression] X 10-fold [attenuation] = 700-fold).