Ch 7

Question 1

As a consequence of the work of the biologist Theodor Engelman, others showed that chloroplasts absorb light mainly in the _____ and ______ part of the spectrum.

Answer 1

Blue-violet…red-orange

Question 2

The products of the light reactions of photosynthesis are

Answer 2

ATP and NADPH

Question 3

The Calvin Cycle makes direct use of ____ to make _____

Answer 3

CO2, ATP, and NADPH…sugar

Question 4

Which pigment participates directly in the light reactions by abosrobing mainly blue-violet and red light?

Answer 4

Chlorophyll a

Question 5

What name is given to membranous sacs found within a chloroplast?

Answer 5

Thylakoids

Question 6

What is the function of stomata?

Answer 6

Gas exchange

Question 7

The color that we see when looking at a pigmented object is ______

Answer 7

The wavelengths that are reflected or transmitted by the pigmented object

Question 8

The energy of wavelengths that appear _____ is least useful to photosynthesis

Answer 8

Green

Question 9

What is true regarding the behavior of a chlorophyll molecule as it absorbs a photon?

Answer 9

The energy of a photon raises an electron to the excited state

Question 10

The overall function of the Calvin cycle is

Answer 10

Making sugar

Question 11

____ is the source of the oxygen gas released by a photosytem

Answer 11

H20

Question 12

Where does the energy for the Calvin cycle come from?

Answer 12

NADPH and ATP

Question 13

The ultimate energy source that supports mos life on Earth is______

Answer 13

Sunlight

Question 14

What is the equation for photosynthesis?

Answer 14

6 CO2 + 6 H20 —-> CH1206 + 6 O2

Question 15

Global climate change could be magnified by _______

Answer 15

Deforestation

Question 16

What compound is found at the reaction center of a photosystem?

Answer 16

Chlorophyll a

Question 17

The Calvin cycle requires _____ and ______ from the light reactions in order to operate.

Answer 17

ATP and NADPH

Question 18

Which of the following is a good reason for using fast-growing trees as fuel?

Answer 18

Vigorously growing plants remove a lot of carbon dioxide from the air

Question 19

In photosynthesis, redox reactions ultimately transfer electrons from ____ to _____

Answer 19

H20…CO2

Question 20

The end products of photosynthesis are ___ and ____

Answer 20

Glucose…molecular oxygen

Question 21

C4 plants conserve water by _____

Answer 21

Keeping stomata closed most of the day

Question 22

How many times must the Calvin cycle turn for the plant cell to be able to produce one molecule of glucose?

Answer 22

Six

Question 23

What is found in both cellular respiration and in the light reactions of photosynthesis?

Answer 23

Electron transport chain

Question 24

What is an example of an autotroph?

Answer 24

Pine tree

Question 25

Forests are considered carbon storage sinks because _______

Answer 25

carbon dioxide is used in the Calvin cycle to make glucose, which is used to make wood and other tree molecules