Study Question 11

The region of the chloroplast labeled #4 is called the _______.

Stroma

What are the two sources of H+ ions which build up in the thylakoid compartment during the light dependent reactions of photosynthesis?

The H+ which are pumped from the stroma into the thylakoid compartment by active transport. The H+ resulting from the breakdown of water in the thylakoid compartment

Label #7 could represent which of the following molecules?

carotenoid chlorophyll b non-reactive chlorophyll a

The synthesis of proteins by the chloroplast takes place on which labeled structure (s)?

1

Which two labels point to the reaction centers of the photosystems? Check all that apply

6 and 12 8 and 12

The sac-like structure labeled #5 is called a __________________.

thylakoid

During the Light Dependent Reactions, which substance is the source of the electrons which replace those lost by reactive chorophyll a P680?

water

Which label represents the enzyme which is directly responsible for the production of ATP during the light dependent reactions of chlorophyll?

11

The light dependent reactions of photosynthesis occur on and within which two labeled structures or regions of the chloroplast?

3 and 6

Within which labeled region of the chloroplast is carbon dioxide converted into the 3 carbon sugar, G3P?

4

Molecule #5 is _______________.

ATP

What chemical compounds are produced by the light dependent reactions of photosynthesis which are used in the light independent reactions of photosynthesis? Check all that apply.

ATP NADPH

What is the function of the accessory pigments in the Light Dependent Reactions of photosynthesis?

Allows the absorption of a broader spectrum of light wavelengths which can be used for photosynthesis

Label #2 points to a molecule of _______.

DNA

Which of the following is a true statement about the light dependent reactions of photosynthesis?

During the light dependent reactions, NADP+ is reduced resulting in the formation of NADPH

The circles labeled #9 represent

H+

The molecule labeled #10 represents

H2O

Which electromagnetic radiation is absorbed by the greenhouse gases and slows their escape from earth; resulting in increased temperature?

Infrared

Which of the following are true statements about chlorophyll b?

It is a large organic molecule having a magnesium atom at its center It is one of the pigments found in the light harvesting complexes of Photosystems I and II.

Which of the following are true statements concerning chlorophyll a?

It is a primary pigment. It reflects primarily green light. It absorbs primarily blue, violet, and red light. It is a large organic molecule having a magnesium atom at its center. It occurs as one of the pigments in the light harvesting complexes of Photosystems I and II.

The molecule labeled #2 is

NADPH

The oxygen produced during the Light Dependent Reactions of photosynthesis may ______.

be consumed by the plant during aerobic respiration diffuse out of the chloroplast and eventually out of the plant tissue and into the atmosphere.

Label 6 represents two molecules of

reactive cholorophyll a p680

The yellow arrow labeled #3 represents

the flow of electrons through the thylakoid membrane

Name two accessory pigments which are embedded in the thylakoid membrane

Chlorophyll b Carotenoids or any type of carotenoid such as xanthophyll, etc.

During the Light Dependent Reactions of photosynthesis, the flow of electrons in the thylakoid membrane provides electrical energy required to pump ________ from the thylakoid compartment into the stroma of the chloroplast by the process of _______

H+; active transport

What is the name and function of molecule #12 in the Light Dependent Reactions?

Name: Electron acceptor molecules Function: The electron acceptor molecules in the reaction center of photosystems I and II accept the "excited electrons" from the reactive chlorophyll a molecules

Bracket A represents

photosystem II

A biologist working for Monsanto, develops an herbicide which kills weeds by blocking the flow of electrons between photosystems II and photosystems I during the Light Dependent Reactions of photosynthesis. Based on your knowledge of the Light Dependent Reactions, explain why the weeds are killed after treatment with the herbicide

Since the herbicide blocks the flow of electrons from Photosystem II to Photosystem I, NADP+ can't pick up electrons to form NADPH produced in the stroma. Since NADPH is required for the synthesis of the sugar GP3 in the light independent reactions. The plant is no longer able to produce all of its organic compounds and the plant dies

Which one of the following greenhouse gases is produced in large quantities as a by product of the decomposition of organic substances under anaerobic conditions by certain species of Archeae living in the gut of herbivorous (ruminants) and omnivorous vertebrates?

methane