Photosynthesis and Respiration Short Questions and Answers

41 The site of glycolysis in a cell is

A chloroplast

B nucleus

C cytoplasm

D mitochondria

View Answer

Answer: cytoplasm

42 The annual plant exchange of gases takes place mainly through

A Leaf scars

B lenticels

C stomata

D stem

View Answer

Answer: stomata

43 Common immediate source of energy in cellular activity:

A NAD

B ATP

C DNA

D RNA

View Answer

Answer: ATP

44 In succulent xerophytes the R.Q is :

A Zero

B unity

C less than one

D more than one

View Answer

Answer: Zero

45 R.Q. of fatty substances is generally:

A Unity

B Zero

C More Than One

D Less Than One

View Answer

Answer: Less Than One

46 In plant cell, digestion of fats occurs with the help of

A Lysosomes

B Peroxisomes

C Glyoxisomes

D Microtubules

View Answer

Answer: Glyoxisomes

47 What are the products of the light reactions that are subsequently used by the Calvin cycle?

A oxygen and carbon dioxide

B carbon dioxide and RuBP

C water and carbon

D ATP and NADPH

View Answer

Answer: ATP and NADPH

48 Where does the Calvin cycle take place?

A stroma of the chloroplast

B thylakoid membrane

C cytoplasm surrounding the chloroplast

D chlorophyll molecule

View Answer

Answer: stroma of the chloroplast

49 In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary?

A autotrophs and heterotrophs

B producers and primary consumers

C photosynthesizers

D autotrophs

View Answer

Answer: autotrophs

50 In autotrophic bacteria, where are the enzymes located that can carry on organic synthesis?

A chloroplast membranes

B nuclear membranes

C free in the cytosol

D along the inner surface of the plasma membrane

View Answer

Answer: along the inner surface of the plasma membrane

51 When oxygen is released as a result of photosynthesis, it is a by -product of which of the following?

A reducing NADP+

B splitting the water molecules

C chemiosmosis

D the electron transfer system of photosystem I

View Answer

Answer: splitting the water molecules

52 A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are being absorbed by this pigment?

A red and yellow

B blue and violet

C green and yellow

D blue, green, and red

View Answer

Answer: blue and violet

53 What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

A Bacteria released excess carbon dioxide in these areas

B Bacteria congregated in these areas due to an increase in the temperature of the red and blue light

C Bacteria congregated in these areas because these areas had the most oxygen being released

D Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths

View Answer

Answer: Bacteria congregated in these areas because these areas had the most oxygen being released

54 An outcome of this experiment was to help determine

A the relationship between heterotrophic and autotrophic organisms

B the relationship between wavelengths of light and the rate of aerobic respiration

C the relationship between wavelengths of light and the amount of heat released

D the relationship between wavelengths of light and the oxygen released during photosynthesis

View Answer

Answer: the relationship between wavelengths of light and the oxygen released during photosynthesis

35 If you ran the same experiment without passing light through a prism, what would you predict?

A There would be no difference in results

B The bacteria would be relatively evenly distributed along the algal filaments

C The number of bacteria present would decrease due to an increase in the carbon dioxide concentration

D The number of bacteria present would increase due to an increase in the carbon dioxide concentration

View Answer

Answer: The bacteria would be relatively evenly distributed along the algal filaments

56 Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different?

A Green and yellow wavelengths inhibit the absorption of red and blue wavelengths

B Bright sunlight destroys photosynthetic pigments

C Oxygen given off during photosynthesis interferes with the absorption of light

D Other pigments absorb light in addition to chlorophyll a

View Answer

Answer: Other pigments absorb light in addition to chlorophyll a

57 The reaction-center chlorophyll of photosystem I is known as P700 because

A there are 700 chlorophyll molecules in the center

B this pigment is best at absorbing light with a wavelength of 700 nm

C there are 700 photosystem I components to each chloroplast

D None of above

View Answer

Answer: this pigment is best at absorbing light with a wavelength of 700 nm

58 Which of the following are directly associated with photosystem I?

A harvesting of light energy by ATP

B receiving electrons from plastocyanin

C P680 reaction-center chlorophyll

D extraction of hydrogen electrons from the splitting of water

View Answer

Answer: receiving electrons from plastocyanin

59 As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from?

A photosystem II

B photosystem I

C cyclic electron flow

D linear electron flow

View Answer

Answer: cyclic electron flow

60 Suppose the interior of the thylakoids of isolated chloroplasts were made acidic and then transferred in the dark to a pH-8 solution. What would be likely to happen?

A The isolated chloroplasts will make ATP

B The Calvin cycle will be activated

C Cyclic photophosphorylation will occur

D Only A and B will occur

View Answer