Are TRANDUCTION and LIGHT DEPENDENT reactions one in the same?

Question

my notes, books, and teachers are all using different names..

Is a transduction reaction simply another name for a light dependent reaction?

doing bio homework about photosynthesis...

thanks a lot!

Answer 1

No.  Transductcion reactions need not be light dependent.  There are many transduction reactions/cascades in biology that do not require light.

Answer 2

signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another. Most processes of signal transduction involve ordered sequences of biochemical reactions inside the cell, which are carried out by enzymes, activated by second messengers, resulting in a signal transduction pathway. Such processes are usually rapid, lasting on the order of milliseconds in the case of ion flux, or minutes for the activation of protein- and lipid-mediated kinase cascades, but some can take hours, and even days (as is the case with gene expression), to complete.

The initial stage of the photosynthetic system is the light-dependent reaction, which converts solar energy into potential energy.

transduction is the conveyance of energy from one electron (a donor) to another (a receptor), at the same time that the class of energy changes.

Photonic energy, the kinetic energy of a photon, may follow the following paths:

be released again as a photon of less energy;

be transferred to a recipient with no change in class;

be dissipated as heat; or

be transduced

In photosynthesis, when the electrons of the "chlorophyll pair" receive the photon energy from the "collecting" associated pigments, the photonic energy is "destined" to link one molecule of phosphate to one of NAD. The resulting NADP in turn will use the stored energy in the generation of ATP, which is the end point of the light-induced photosynthetic process. This means that the photon's energy ends up its circuit by being transduced to an electron that takes part in the formation of a molecular link of energy-rich phosphate.

In the pathway of this end-point transduction, the energy is transferred along a number of molecules (cytochromes), in a downward way so that energy is partially dissipated at each step. The liberated heat energy serves the homeostasis of the plant, and at the end of the chain the remaining energy is perhaps exactly the one that is needed to build NADP.

This is a hard one but i think that they are different but i hope this helps.