What is Light Reaction?
Light reactions are reactions which are initiated by light (also photoinduced reactions). Generally light energy is converted into chemical energy
C4plants differ from C3 and CAM plants in that C4 plants
transfer fixed carbon dioxide to cells in which the Calvin cycle occurs
During photosynthesis in eukaryotic, a high proton concentration accumlates or is formed in ___________
the (inner ) thylakoid space
Why do the oxidation of organic compounds by molecular oxygen (O2) yeilds so much energy?
Oxygen atoms has a higher affinity for electrons than carbon atoms
What wavelengths of light absorbed by pigments in the granum are mainly in which range
Blue- Violet and Red Orange
During the reaction C6H12O6+6O2 =6CO2 +6H2O what is oxidized and _____ is the product of oxditsation?
During the reaction C6H12O6+6O2 =6CO2 +6H2O what compound is by-product of the oxidation of glouse
During the reaction C6H12O6+6O2 =6CO2 +6H2O which compound is reduced as a result of reaction
During photosynthesis an electron transport chain is used to _______
transport electron from photosystem II to photosystem I
In the overall process of glycolysis and cell respiration,_____ is oxidizatiod and ____ is reduced.
glucouse and oxygen
In eukaryotic cell ____ is a a second messager that is produced as a response to am external signal such as a hormone?
WHta is the name of the process in which glucose is converted to pyruvate with the production of ATP and NADH?
In a rosebush, chlorophyII is located in ___________.
Thylakoids which are in chloroplasts in the mesophyll cells of a leaf
In an expermient , mice were fed (C6H12O6) containing a small amount of radioaaction oxygen. The mice were closely monitored, and after a few mins. radioactive O2 atoms showed up in
The energy used to produce ATP in the light reaction of photosynthesis comes from ______.
movement of H+ through a membrane.
In photosynthesis what is the fate of the oxygen atoms present in CO2? They end up ____.
Sugar molecules and in water
Second messager tends to be water - soluble and small. This accounts for the ability to _________
Rapidly move throughout the cell by diffusion
The wavelength of light most effective in driving photosynthesis are referred to as ______
an action spectrum
Cells of the GI tract and cells of the heart respond differently to epinephrine because____
there are diffrences in the proteins found in the two types of cells
Cells use diffrent signaling strategies to achieve diffrent goals. In hormaonal signaling ________.
specialized cells release hormone molecules into the circulatory system, permitting distant cells to be affected.
The binding of a signal molecule to a ligand gated ion channel ________
affect the membrane potential
Protein pores in teh plasma membrane that open or close in response to a chemiacal singnal allowing or blocking the flow of specific ions
What is Sporophyteis ?
replicates using spores ,diploid, which develop into gametophyte . Ferns are the best example and rose,and algae
What is Gametophyte ?
haploid generation, reduction division upto fertilization, lower forms and becomes reduced and dependent in higher plants,gametes which on fusion produce sporophyte
What is Alternation of generations?
Sexual reproduction involves the two alternating processes of meiosis and fertilization
What is the sequences of the synthesis of ATP associated with eletron transport in mitochonidria
NADH< ELETRON TRANSPORT PROTON GRADIENT CHEMIOSMOSIS
If a modified form of GTP that cannot be enzymatically converted GDP were add to a culture of cells the likely result would be
that the attachted G proteins would remain locked in the on postion transmitting signal even in the absence of signaling molecule
Sencond messagers tend to be water soluble and small. This accounts for their ability to:
Rapidly move throughout the cell by diffuision
Cholera develops when the bacterial toxin
prevents G-protein in activation which leads to the continous production of cAMP
The ATP synthese in a human cell obtains enery for makimg ATP directly from
the flow H+ across a membrane through the ATP synthase enzyme
Why is the cirtric acid cycle called a cycle
because the 4 carbon acid that accepts the acetyl CoA in the st step of the cycle is regented by the last step of the cycle
Where do most of NADA that delivers eletrons to the eletron transport chain comes from
The calvin cycle
Where do the eletrons needed by photosystems originate
WATER: the splitting of water provides the source of electron of photosystems 11