-
question_answer1)
Which of the following radioactive oxygen was used to detect the source of oxygen in photosynthesis
A)
\[{{O}^{12}}\] done
clear
B)
\[{{O}^{16}}\] done
clear
C)
\[{{O}^{18}}\] done
clear
D)
\[{{O}^{15}}\] done
clear
View Solution play_arrow
-
question_answer2)
If in a photosynthetic system\[{{H}_{2}}{{O}^{18}}\]type is provided, what will be the type of oxygen released in the process
A)
\[{{O}^{18}}\] done
clear
B)
\[{{O}^{16}}\] done
clear
C)
\[{{O}_{2}}\]normal done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer3)
During formation of glucose which of the following is obtained from water
A)
Oxygen done
clear
B)
Hydrogen done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer4)
Which of the following is obtained from\[C{{O}_{2}}\]during glucose manufacture
A)
Oxygen done
clear
B)
Carbon done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer5)
Warburg studied his effect on
A)
Chlamydomonas done
clear
B)
Chlorella done
clear
C)
Volvox done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer6)
McAlister and Mayer have studied the Warburg's effect on
A)
Pea done
clear
B)
Arachis done
clear
C)
Soyabean done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer7)
Discovery of Emerson effect has clearly shown the existence of [MP PMT 1987; BHU 1979]
A)
Two distinct photochemical reactions or processes done
clear
B)
Light and dark reactions in photosynthesis done
clear
C)
Photophosphorylation done
clear
D)
Photorespiration done
clear
View Solution play_arrow
-
question_answer8)
During photosynthesis, the oxygen in glucose comes from [DPMT 1982, 83; CPMT 1972, 81; MP PMT 1984]
A)
Water done
clear
B)
Carbon dioxide done
clear
C)
Both from\[C{{O}_{2}}\]and water done
clear
D)
Oxygen in air done
clear
View Solution play_arrow
-
question_answer9)
The experimental material that has largely been responsible for making rapid advances in research on photosynthesis is [CPMT 1985; RPMT 2002]
A)
Chlamydomonas done
clear
B)
Spinach leaf done
clear
C)
Chlorella done
clear
D)
Hydrilla done
clear
View Solution play_arrow
-
question_answer10)
Which of the method is more effective to know the chemical pathway of a physiological process
A)
Titration method done
clear
B)
Calorimetric method done
clear
C)
Tracer technique done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer11)
The oxygen produced during photosynthesis comes from photolysis of water was first time proved by [MP PMT 1984, 88, 95]
A)
Ruben and Kamen done
clear
B)
Robert Mayer done
clear
C)
Malvin Calvin done
clear
D)
Blackman done
clear
View Solution play_arrow
-
question_answer12)
The first experiment on photosynthesis in flashing light were carried out by [MP PMT 1990]
A)
F. F. Blackman done
clear
B)
Robert Emerson and Arnold done
clear
C)
Melvin Calvin done
clear
D)
Robert Hill done
clear
View Solution play_arrow
-
question_answer13)
Moll's experiment shows [MP PMT 1989; AFMC 1987; KCET 2001]
A)
Unequal transpiration from two surfaces of leaf done
clear
B)
Relation between transpiration and absorption done
clear
C)
\[C{{O}_{2}}\]is required for photosynthesis done
clear
D)
Chlorophyll is essential for photosynthesis done
clear
View Solution play_arrow
-
question_answer14)
Algae used by Calvin and associates for photosynthetic research is [BHU 1987, 91; RPMT 2002]
A)
Chlorella done
clear
B)
Chlamydomonas done
clear
C)
Volvox done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer15)
The path of\[C{{O}_{2}}\]in the dark reaction of photosynthesis was successfully traced by the use of the following or The dark reaction is traced by [CPMT 1990; MP PMT 1987; BHU 1992]
A)
\[{{O}_{2}}^{18}\] done
clear
B)
\[{{C}^{14}}{{O}_{2}}\] done
clear
C)
\[{{p}^{36}}\] done
clear
D)
X-rays done
clear
View Solution play_arrow
-
question_answer16)
Blackman demonstrated that increasing illumination increased the photosynthetic rate upto a point when\[C{{O}_{2}}\]becomes limiting. If light was not limiting, temperature becomes limiting. Emerson found that maximum\[C {{O} _ {2}}\] fixation could be achieved with brief flashes of light. Mark the correct statement in the following [CPMT 1988, 89]
A)
Only one factor can be limited in photosynthesis done
clear
B)
Photosynthesis consists of a light and dark reaction done
clear
C)
The trapping of light by chloroplast is temperature dependent done
clear
D)
The trapping of light by chloroplast can occur only if\[C {{O} _ {2}}\] is present done
clear
View Solution play_arrow
-
question_answer17)
Persons who received Nobel Prizes for their work with green plants are [NCERT 1984]
A)
Calvin and Waston done
clear
B)
Calvin and Borlang done
clear
C)
Beadle and Tatum done
clear
D)
Flemming and Waksman done
clear
View Solution play_arrow
-
question_answer18)
The thylakoids are removed and kept in a culture medium containing\[C{{O}_{2}}\]and\[{{H}_{2}}O\]. If the setup is exposed to light, hexose sugars are not formed as the end product. The most appropriate reason for this will be that [AIIMS 1980, 85]
A)
Carbon assimilation cannot take place done
clear
B)
The pigments (P-700 and P-680) are not linked done
clear
C)
Enzymes are not available done
clear
D)
The light trapping device is not functional done
clear
View Solution play_arrow
-
question_answer19)
Isotopes popularly known to have been used in the study of photosynthesis are [BHU 1985]
A)
\[{{C}^{14}}\]and\[{{O}^{18}}\] done
clear
B)
\[{{C}^{11}}\]and\[{{C}^{32}}\] done
clear
C)
\[{{C}^{16}}\]and\[{{N}^{15}}\] done
clear
D)
\[{{p}^{32}}\]and\[{{C}^{15}}\] done
clear
View Solution play_arrow
-
question_answer20)
Extraction and separation of chlorophylls and carotenoids tackles by
A)
Moll's half-leaf experiment done
clear
B)
Paper chromatography method done
clear
C)
Ganong's light screen done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer21)
The graph given below shows the effect of potassium cyanide on the rate of photosynthesis of Chlorella at different light intensities. Which one of the following can be deduced from the graph
A)
Potassium cyanide appears to inhibit the light (Hill) reaction done
clear
B)
Potassium cyanide appears to absorb more light at high light intensities done
clear
C)
Potassium cyanide appears to inhibit photosynthesis equally at high and low light intensities done
clear
D)
Potassium cyanide appears to have no inhibiting effect on photosynthesis at low light intensities done
clear
View Solution play_arrow
-
question_answer22)
When a rat was placed into a closed container, it got suffocated and died but when a plant was also introduced into it, the rat survived. Who performed this experiment
A)
Ingenhousz done
clear
B)
Priestley done
clear
C)
Englemann done
clear
D)
Thimann done
clear
View Solution play_arrow
-
question_answer23)
What plant is used in an experiment commonly performed in laboratory in demonstrate evolution of oxygen in photosynthesis [RPMT 1997]
A)
Sunflower done
clear
B)
Hydrilla done
clear
C)
Croton done
clear
D)
Balsam done
clear
View Solution play_arrow
-
question_answer24)
Two plants A and B are supplied with\[C{{O}_{2}}\]with\[{{H}_{2}}{{O}^{18}}\]and\[C{{O}_{2}}^{18}\]with\[{{H}_{2}}O\]respectively which of the following plant releases O18 type oxygen in photosynthesis [CPMT 2000]
A)
A plant done
clear
B)
B plant done
clear
C)
Both [a] and [b] done
clear
D)
First [a] and then [b] done
clear
View Solution play_arrow
-
question_answer25)
Path of carbon in photosynthesis was found by using [Kerala CET 2002]
A)
Centrifugation done
clear
B)
Radio isotopes done
clear
C)
Fractionation done
clear
D)
Chromatography done
clear
View Solution play_arrow
-
question_answer26)
Variegated leaves of a plant were supplied with radioactive carbon dioxide (nothing\[^{14}C{{O}_{2}}\]) during an experiment. Leaf X was kept in the dark and leaf Y was kept in the light. At the end of the experiment the radioactivity in the leaves was measured and found to be as shown on the diagram below. What is the most likely explanation for the level of radioactivity found in the yellow zone of Y [BVP 2003]
A)
Photosynthesis occurs but no storage of starch occurs in this zone done
clear
B)
Radioactive carbon dioxide diffuses into the leaf and accumulates here done
clear
C)
Products of photosynthesis diffuse into the yellow zone done
clear
D)
Photosynthesis proceeds slowly in the absence of chlorophyll a and b done
clear
View Solution play_arrow
-
question_answer27)
Engelmann's experiment with Spirogyra demonstrated that [BVP 2003]
A)
The full spectrum of sunlight is needed for photosynthesis done
clear
B)
Only red wavelengths are effective in causing photosynthesis done
clear
C)
Only blue wavelengths are effective done
clear
D)
Both blue and red wavelengths are effective done
clear
View Solution play_arrow
-
question_answer28)
Pastur's effect is [Wardha 2005]
A)
Stoppage of fermentation in presence of oxygen done
clear
B)
Increase in fermentation in presence of oxygen done
clear
C)
Decrease in fermentation in presence of oxygen done
clear
D)
No effect on fermentation done
clear
View Solution play_arrow