Ch6 Photosynthesis Acquiring Energy From The Full Test Bank

Essentials of The Living World, 6e (Johnson)

Chapter 6 Photosynthesis: Acquiring Energy from the Sun

1) Approximately, how much of the radiant energy from the sun is incorporated into organic compounds through photosynthesis?

A) 90%

B) 75%

C) 50%

D) 25%

E) 1%

2) The full range of photons of many energy levels of the sun is called

A) the electromagnetic spectrum.

B) visible light.

C) ultraviolet light.

D) infrared radiation.

E) pigment.

3) During the light-dependent reactions of photosynthesis, ATP molecules are generated by

A) the Calvin cycle.

B) chemiosmosis.

C) the splitting of water.

D) light striking the chlorophyll molecules.

E) a buildup of oxygen molecules.

4) The overall purpose of the Calvin cycle is to

A) generate molecules of ATP.

B) generate NADP.

C) give off oxygen for animal use.

D) build organic molecules.

E) make water.

5) When carbon dioxide is low in the leaf, the Calvin cycle cannot proceed efficiently, ________ occurs.

A) light-independent reactions

B) photosynthesis shut down

C) photorespiration

D) cellular respiration

E) oxygen release

6) C4 photosynthesis is an adaptation to hot, dry conditions in which

A) CO2 is fixed and concentrated in the leaf.

B) water is stored in the stem.

C) oxygen is stored in the root.

D) light energy is stored in chloroplasts.

E) photosynthesis is increased.

7) Within chloroplasts, the semiliquid-like substance is called the

A) thylakoids.

B) grana.

C) stroma.

D) mesophyll.

E) stomata.

8) Light contains tiny packets of energy called

A) rays.

B) photons.

C) light waves.

D) wavelengths.

E) sun rays.

9) Plants absorb ________ and ________ wavelengths of light and reflect ________ wavelengths.

A) green; red; blue

B) green; blue; red

C) red; blue; green

D) white; green; blue

E) white; red; green

10) Most of the atmospheric oxygen occurs as a result of photosynthesis. From which of the following molecules is oxygen derived?

A) carbon dioxide

B) water

C) glucose

D) chlorophyll

E) NADH

11) Chlorophyll is important to plants because these pigments are able to

A) remove carbon dioxide from the air.

B) absorb water so that hydrolysis can be carried out in the chloroplasts.

C) absorb red and blue wavelengths of light very efficiently.

D) capture UV radiation that is harmful to the DNA in the nucleus of plant cells.

E) store electrons for use during the "dark" reaction of photosynthesis.

12) Which wavelength of light is the shortest?

A) gamma rays

B) x-rays

C) UV light

D) visible light

E) infrared

13) When something appears blue, it is absorbing all colors except ________.

A) yellow

B) red

C) blue

D) green

E) orange

14) Check all that are used in the Calvin cycle to produce organic molecules.

A) O2

B) ATP

C) H2O

D) NADPH

E) CO2

15) Photosynthetic pigments are embedded into the membranes of flattened sacs within chloroplasts called

A) matrices.

B) Golgi bodies.

C) stroma.

D) cristae.

E) thylakoids.

16) You would expect to see one glucose molecule drop out of a model of the Calvin cycle once you had seen the model turn how many times?

A) 1

B) 2

C) 3

D) 5

E) 6

17) Molecules that absorb light energy are called

A) pigments.

B) thylakoids.

C) enzymes.

D) electron transport systems.

E) grana.

18) The energy to power the Calvin cycle comes from

A) cellular respiration.

B) the light-dependent reactions of photosynthesis.

C) the light-independent reactions of photosynthesis.

D) oxygen.

E) chlorophyll.

19) Three turns of the Calvin cycle produce

A) glucose.

B) oxygen.

C) glyceraldehyde 3-phosphate.

D) rubisco.

E) 3-phosphoglycerate.

20) If you see the color red, there is a blue pigment present in the object at which you are looking.

21) ________, which is generated by the light-dependent reactions, provides a source of hydrogens and the energetic electrons needed to bind them to carbon atoms in the Calvin cycle.

22) The formation of ATP driven by the diffusion of protons down their concentration gradient through ATP synthase channels is called ________.

23) If you could reverse the direction of the light-dependent reactions, electrons would flow to photosystem ________ from photosystem ________.

24) In CAM plants,

A) the stomata open mainly at night.

B) the stomata open only during the day.

C) malate is transferred from mesophyll cells to bundle-sheath cells.

D) photorespiration is conducted at night, and C3 photosynthesis is conducted during the day.

E) glasses can control photorespiration.

25) Inside the inner membranes of chloroplasts, chlorophyll pigments are grouped into a light-gathering complex called a ________.

26) Thylakoids are stacked on top of one another into columns called ________.

27) The portion of the electromagnetic spectrum visible to the human eye is known as ________ ________.

28) The Calvin cycle is also called C3 photosynthesis because the first molecule produced in the process is a ________-carbon molecule.

29) What is photorespiration and under what conditions does it occur?

30) Explain the role that water plays in the light-dependent reactions.

31) If you could block photosynthesis at any point, where should you block it if you want to stop oxygen production?

A) photosystem II

B) rubisco

C) NADPH

D) reaction center

E) None of the answer choices are correct.

32) You are given a leaf to examine in biology lab. You are asked to dip the leaf in water to observe its hydrophobic activity. What layer provides this watertight barrier?

A) epidermis

B) stoma

C) bundle sheath

D) cuticle

E) mesophyll

33) In biology lab, you are given a slice of leaf to examine using a microscope. You observe cells that contain chloroplasts. You know you are looking at ________ cells.

A) epidermis

B) stoma

C) bundle sheath

D) cuticle

E) mesophyll

34) Check all activities that apply to the light-dependent reactions.

A) carbon fixation

B) ATP production

C) NADPH production

D) splitting of water

E) glucose production