Answer:
A. donation of excited electrons by chlorophyll a to a primary electron acceptor
Explanation:
Photosystems are structures located at the thylakoid membrane that act to harvest energy light in order to convert it into chemical energy. Each photosystem is composed of a light-harvesting complex and a core complex, which in turn is composed of a reaction center. The photosynthetic reaction centers are multi-protein complexes that use light energy to catalyze the electron transfer across the chloroplast thylakoid membrane against a thermodynamic gradient. Moreover, antenna pigments are pigments that capture the energy from photons in order to transfer energy to other pigments in the photosystem (e.g., chlorophyll B and carotenes are antenna pigments, whereas chlorophyll A is the core pigment). Light energy absorbed by antenna pigments in the photosystems is transferred to the reaction center chlorophyll A molecules, thereby exiting electrons in the reaction center. A reaction center consists of two chlorophyll A molecules, which donate electrons to the primary electron acceptor.
Answer:
C
Explanation:
25% of 16 cells is 4
If you multiply .25 by 16 you will get four and that is how many cells are dividing.
The answer to the question above is letter a. melting.
>Exothermic is the giving off heat energy the transfer of energy to the surroundings.
>In exothermic reaction, the energy is
usually transferred as heat energy
<span>> Other example of exothermic is combustion</span>
<em>They are exothermic as they take temperature from the surrounding and then maintain their internal body temperature according to the amount of heat absorbed :)</em>
Answer:
The correct pair is -'d' that is nuclear accumbens-reward.
Explanation:
The location of nuclear accumbens is the basal region of fore brain.This is the part of basal ganglia.
This is an important part of ventral striatum along with dorsal striatum which from the basal ganglia.
The main structure of nuclear accumbens are core and shell.
The shell region is also called as NAcc shell is located in the outer region of the nuclear accumbens also called as dorsal amygdala.
The core region NAcc core is located in the inner region of the nuclear accumbens and considered to be a part of basal ganglia.
This region control the reward and punishment centers that are present in the brain. This contain another function which is associated with psychotic problem such as depression, addiction and ablation etc.
