photosynthesis

Which of the following are products of the Calvin cycle and are utilized in the light reactions of photosynthesis?

ADP,P,NADP

Cyclic electron flow in the chloroplast produces

ATP

The light reactions of photosynthesis supply the Calvin cycle with

ATP and NADPH

what is produced by the light-dependent reactions of photosynthesis and used in the calvin cycle

ATP and NADPH

Which of the following statements is not true of ribulose bisphosphate carboxylase

It catalyzes a photophorilation

A plant is exposed to increasing light intensity from very dim to bright light, while the carbon dioxide concentration and temperature are kept at an optimum level. What will happen to the rate of oxygen production?

It will increase to a maximum level

Which variable has the least effect on enzyme activity?

Light intensity

The reactions of the Calvin cycle require all of the following molecules EXCEPT:

NADPH

All of the events listed below occur in the light reactions of photosynthesis except

carbon dioxide is incorporated into PGA.

You have just discovered a new flower species that has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are NOT being absorbed by this pigment?

Red and yellow

Which of the following statements about the light reactions of photosynthesis is FALSE?

The proton gradient to reduce NADP

The photosynthetic activity of desert plants is often reduced in the middle of the day. What is the most reasonable explanation for this fact?

The stomata close to preserve water and gas exchange decreases

All the following statements are correct regarding the Calvin Cycle except

These reactions begin soon after sundown and end before sunrise.

Where is the chlorophyll found in a plant cell

Thylaoid membranes

The primary function of the light reactions of photosynthesis is...

To produce ATP and NADPH

Tylakoids strackted in colums

are called grama

Organisim that can exist on light and inorganic form of carbon and other raw material

are called photoautotrophs.

Which type of light is least useful for photosythesis

green

Each photosystem

has special chlorophyll "a" molecule in the reaction center

All the following compounds are required at some stage of the photosythesis except

oxygen

Which of the following is not assiciated with photosystem II

photophosphorylation

Which of the following statements is more closely associated with a decrease in a potential world of food production

photorespiration

What is the source of the oxygen released into the air as a product of of photosythesis

water

What is the source of oxygen rekeases into the air as a product of photosynthesis

water only

Which of the following sequences correctly represents the flow of electrons during photosynthesis

H2O → NADPH → Calvin cycle

Which of the following is not directly associated with photosystem I

Harvesting light energy by cholophyll

where do the light dependent and light independent reactions occur

I and IV

What does the chemiosmotic process in chloroplasts involve?

establishment of a proton gradient

These 3 susbstrartes for the enzyme RubBP carboxylase are

CO2, O2 and RuBP

Which of the folowing staments regarding events in the functioning of photosystem II is false

The P680 chlorophyll donates a pair of protons to NADPH, which is thus

All of the following statements are true EXCEPT:

The light reactions of photsynthesis provide energy from the calvin cycles

which of the following does not occur in the Calvin Cycle

relese oxygen

The reaction center chlorophyll of this system is known as P700 because

this pigment is best at absorbing light having a wavelength of 700nm (the far-red part of the spectrum).

In plant cell ATP is made in response to light as ETC is involved this chain is found in the

thylakoid membranes