Biology, 29.10.2019 01:31 weston202

The light reactions require the cooperation of 2 photosystems to power linear electron flow from h2o to nadp+.?
separate each item into one of the three categories, photosystem ii (ps ii) only, photosystem i (ps i) only, or both ps ii and ps i.
1. reduction of nadp+.
2. reduction of primary electron acceptor.
3. oxidation of water.
4. light absorbtion.
5. reduction of electron transport chain between the two photosystems.
6. oxidation of electron transport chain between the two photosystems.

Answers: 3

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Answer from: tami5

Only Photosystem I - 1, 5, 6

Only photosystem II - 3, 2

Both Photosystem I and II - 4

Explanation:

Only Photosystem I

a) Reduction of NADP+ - uses light energy to convert NADP+ to NADPH2

b) Reduction of electron transport chain between the two photosystems

c) Oxidation of electron transport chain between the two photosystems.

Only photosystem II

a) Oxidation of water - here the absorbed light energy is used to dissociate of water molecules to produces protons (H+) and O2 along with free ions

b)Reduction of primary electron acceptor - An electron is taken by pheophytin which is a primary electron acceptor molecule that is located within photosystem II and hence it get reduced.

Both Photosystem I and II

a) Light is absorbed in both photosystem I and II. While in photosystem I, light waves of large wavelength i.e 700 nm are absorbed, in photosystem II light waves of short wavelength of i.e 680 nm are absorbed.

Answer from: Quest

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

Answer from: Quest

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.

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The light reactions require the cooperation of 2 photosystems to power linear electron flow from h2o...