Chapter 9

Ace your homework & exams now with Quizwiz!

At night, CAM plants incorporate CO2 into ____, which is stored in the ____ of their cells.

. malate; vacuoles

What color does chlorophyll reflect

Green

What are the two phases of photosynthesis?

Light-dependent reactions and carbon fixation reactions

How many electrons are needed to reduce one molecule of NADP+ to NADPH?

Two

What is the ultimate source of electrons for noncyclic electron transport, and thus photosynthesis

Water

What is the process by which light energy is converted into the stored chemical energy of organic molecules

Photosynthesis

Which photosynthetic unit consists of a pair of chlorophyll a molecules with an absorption peak of 700 nm

Photosystem I

Which part of the chlorophyll molecule is responsible for absorbing light?

Porphyrin ring

. In which part of the chloroplast do the carbon fixation reactions take place?

Stroma

What is the fluid-filled sac within the inner membrane of a chloroplast called?

Stroma

The graph in the accompanying figure represents the

absorption spectra for chlorophylls a and b

Land plants, algae, and certain prokaryotes are known as

photoautotrophs

The energy of a(n) ____ is inversely proportional to its wavelength

photon

By definition, substances that absorb visible light are called

pigments

A chlorophyll molecule has a porphyrin ring containing a single atom of

magnesium.

Which is the energy source that drives the Calvin cycle

ATP and NADPH

Carbon is fixed in which part of the accompanying diagram?

4

Which best summarizes the overall reactions of photosynthesis?

6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O

Thylakoid membranes are involved in ____ synthesis.

ATP

What happens in the second phase of the Calvin cycle

ATP and NADPH are used to convert the PGA molecules to glyceraldehyde-3-phosphate.

How are chlorophyll molecules attached to thylakoid membranes

By a long hydrocarbon side chain

During photosynthesis, ____ is reduced and ____ is oxidized

CO2; H2O

Which of the following are accessory photosynthetic pigments that expand the spectrum of light to provide energy for photosynthesis?

Carotenoids and chlorophyll b

ATP synthesis during the light-dependent reactions occurs by which process

Chemiosmosis

Which of these absorbs light primarily in the blue and red regions of the visible spectrum and is the main pigment of photosynthesis?

Chlorophyll

Which type of electromagnetic waves has the shortest wavelength

Gamma waves

A group of thylakoid discs make up what part of the chloroplast?

Granum

During which phase of photosynthesis is ATP and NADPH synthesized

Light-dependent phase

In C4 plants, reactions that fix CO2 into four-carbon compounds occur in what type of cells

Mesophyll cells

Which of the following would be classified as a CAM plant

Orchid

The synthesis of ATP during photosynthesis or respiration is the result of what process?

Phosphorylation of ADP

Which process not only yields electrons that replenish photosystems I and II, but also is the source of almost all the oxygen in Earth's atmosphere?

Photolysis

Animals, fungi, and most prokaryotes are known as

chemoheterotrophs

The action spectrum of photosynthesis best matches the absorption spectrum of

chlorophylls a and b.

ATP is formed when ____ the thylakoid lumen.

hydrogen ions leave

An electron absorbs a photon of light energy and becomes energized; the electron shifts from a ____ atomic orbital to a __________ atomic orbital.

lower energy; higher energy

In C3 plants, the ____ are typically closed at night and open during the daytime to allow for gas exchange

stomata

Chlorophyll and accessory photosynthetic pigments are associated with which part of the chloroplast?

thylakoid membranes

Where is the electron transport chain of photosynthesis located

thylakoid membranes


Related study sets

2017 Fall Exam 2 histo review questions

View Set

Chapter 22 A&P Female Reproductive System

View Set

Finding the area of irregular shapes

View Set