LIGHT DEPENDENT REACTION

Multiple Choice

The light dependent reactions occur on the ________ while the Calvin cycle occurs in the ________.

• stroma of chloroplast; thylakoid membranes

• thylakoid; stroma of chloroplast

• thylakoid membranes; stroma of chloroplast

• cytoplasm; thylakoid membrane

Multiple Choice

The primary pigment in the Photosystem I is

• P680

• P700

• P600

• P780

Multiple Choice

Electrons are excited by energy absorbed by __

• water

• oxygen

• proteins in the reaction center

• chlorophyll and accessory pigments

Multiple Choice

Electrons are excited in what molecule of the reaction center?

• Electron transport chain

• Primary electron acceptor

• Chlorophyll a

• Accessory pigments

Multiple Choice

What causes electron deficiency in the reaction centre of Photosystem II?

• The excitation of electron at the reaction centre.

• The formation of NADPH.

• The split of water molecules.

• The transfer of electron to the Photosystem I.

Multiple Choice

What supplies the electron that is lost in PSII?

• Water

• Plastoquinone

• Plastocyanin

• Ferredoxin

Multiple Choice

During non-cyclic photophosphorylation, what supplies the electron that is lost in PS I?

• Water

• PS II

• PS I

• Ferredoxin

Multiple Choice

ATP is created during the light reactions of photosynthesis in a manner that is similar to cellular respiration. How is this accomplished?

• by the creation of a water molecule by joining protons and electrons.

• by a proton concentration gradient and ATP synthase.

• by the splitting of a water molecule and movement of electrons through ATP synthase.

• by the energy derived from photosystems I and II.

Multiple Choice

Cytochrome complex is a proton pump that pump proton from __ into __.

• thylakoid space; stroma of chloroplast

• stroma of chloroplast; thylakoid space

• thylakoid membrane; stroma of chloroplast

• stroma of chloroplast; thylakoid membrane

Multiple Choice

Hydrogen ions diffuse from __ into __ by __ via ATP synthase.

• thylakoid space; stroma of chloroplast; chemiosmosis

• stroma of chloroplast; thylakoid space; chemiosmosis

• thylakoid membrane; stroma of chloroplast; proton pump

• stroma of chloroplast; thylakoid membrane; proton pump

Multiple Choice

During non-cyclic photophosphorylation, what supplies the electron that is lost in PS I?

• Water

• PSII

• PSI

• Plastocyanin

Multiple Choice

Cyclic photophosphorylation results in the formation of

• ATP only

• ATP and NADPH

• NADPH

• ATP, NADPH and oxygen

Multiple Choice

What are the products of light dependent reaction in photosynthesis?

• ATP, carbon dioxide and water.

• ATP, NADP⁺ and oxygen.

• ATP, NADPH and oxygen.

• ATP, carbon dioxide and glucose.

Multiple Choice

Which of the following processes are involved in the light dependent reactions?

I. Carbon fixation.

II. Chemiosmosis.

III. Reduction of NADP⁺.

IV. Regeneration of RuBP.

• I only

• I and III only

• II and III only

• I, II, III and IV