Question

fill in sentences from the following list below

ADP

AGAINST

ATP

ATP SYNTHASE

DOWN

ELECTRON TRANSPORT CHAIN

ELECTRONS

ER

INNER

NADH

NADPH

OUTER

PHOTOSYSTEMS

PROTONS

RUBISCO

THYLAKOID

The light reactions of photosynthesis use light energy to manufacture two types of energy-rich molecules: _______ and the electron carrier ________. Photons are captured by protein complexes with embedded chlorophyll molecules and other pigments.  These complexes are known as ___________.  One of them absorbs light most efficiently at 680 nm, the other absorbs best at 700 nm. The complexes are inserted in the _______ membranes of chloroplasts. Absorbed light energy is directed to "special pairs" of chlorophyll molecules, dislodging  ___________ (protons/ electrons). These particles are then passed on to a series of four protein complexes and pigments, also arranged in the membrane. The series is collectively known as a(n) ________. As the particles are passed from one member of the series to the next, some of the energy they release is used to pump________ across the membrane, generating an electrochemical gradient. The ________ (protons/ electrons) diffuse back _____________ (against/ down) their gradient, passing through the enzyme ___________. The kinetic energy of the particle stream causes the enzyme to rotate at great speed, giving it the energy to phosphorylate molecules of _______________, producing the universal energy carrier ___________________.  

Answer 1

The light reactions of photosynthesis use light energy to manufacture two types of energy-rich molecules: _ATP______ and the electron carrier ____NADPH____. Photons are captured by protein complexes with embedded chlorophyll molecules and other pigments.  These complexes are known as __PHOTOSYSTEMS_________.  One of them absorbs light most efficiently at 680 nm, the other absorbs best at 700 nm. The complexes are inserted in the THYLAKOID_______ membranes of chloroplasts. Absorbed light energy is directed to "special pairs" of chlorophyll molecules, dislodging  __electrons_________ (protons/ electrons). These particles are then passed on to a series of four protein complexes and pigments, also arranged in the membrane. The series is collectively known as a(n) ELECTRON TRANSPORT CHAIN________. As the particles are passed from one member of the series to the next, some of the energy they release is used to pump__Against______ across the membrane, generating an electrochemical gradient. The _protons_______ (protons/ electrons) diffuse back ___down__________ (against/ down) their gradient, passing through the enzyme ___ATP SYNTHASE________. The kinetic energy of the particle stream causes the enzyme to rotate at great speed, giving it the energy to phosphorylate molecules of __ADP_____________, producing the universal energy carrier ____ATP_______________.  

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