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Free download in PDF Photosynthesis and Respiration Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
41
The site of glycolysis in a cell is
A
chloroplast
B
nucleus
C
cytoplasm
D
mitochondria
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42
The annual plant exchange of gases takes place mainly through
A
Leaf scars
B
lenticels
C
stomata
D
stem
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43
Common immediate source of energy in cellular activity:
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44
In succulent xerophytes the R.Q is :
A
Zero
B
unity
C
less than one
D
more than one
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45
R.Q. of fatty substances is generally:
A
Unity
B
Zero
C
More Than One
D
Less Than One
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46
In plant cell, digestion of fats occurs with the help of
A
Lysosomes
B
Peroxisomes
C
Glyoxisomes
D
Microtubules
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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
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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
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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
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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
Answer: The isolated chloroplasts will make ATP
