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question_answer1)
Dark reaction of photosynthesis is called
A)
Aphotic action done
clear
B)
Black action done
clear
C)
Blackman's reaction done
clear
D)
None of the above done
clear
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question_answer2)
In normal chloroplast, the percentage of chlorophyll is
A)
50% done
clear
B)
75% done
clear
C)
5-10% done
clear
D)
95% done
clear
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question_answer3)
Which of the enzyme is involved in the conversion of 3PGA to 3PGAL
A)
Triose phosphate dehydrogenase done
clear
B)
Carboxydismutase done
clear
C)
Phosphatase done
clear
D)
Aldolase done
clear
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question_answer4)
The number of carbon atoms is five in
A)
Xylulose done
clear
B)
Ribose done
clear
C)
Ribulose done
clear
D)
All the above done
clear
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question_answer5)
Sedohaptulose is a carbohydrate having
A)
3 carbon atoms done
clear
B)
2 carbon atoms done
clear
C)
4 carbon atoms done
clear
D)
7 carbon atoms done
clear
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question_answer6)
First stable product of Calvin cycle has
A)
2 carbon atoms done
clear
B)
3 carbon atoms done
clear
C)
4 carbon atoms done
clear
D)
6 carbon atoms done
clear
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question_answer7)
Phosphatase enzymes in\[{{C}_{3}}\]cycle participate in
A)
Addition of phosphate done
clear
B)
Removal of phosphate done
clear
C)
Both the above done
clear
D)
The enzyme is not concerned with removal or addition of phosphate done
clear
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question_answer8)
In dark reaction, first reaction is the
A)
Carboxylation done
clear
B)
Decarboxylation done
clear
C)
Dehydrogenation done
clear
D)
Deamidation done
clear
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question_answer9)
Which one of the following is the product of dark reaction of photosynthesis [Bihar MDAT 1991]
A)
\[C{{O}_{2}}\] done
clear
B)
ATP done
clear
C)
Pyruvic acid done
clear
D)
Phosphoglyceraldehyde done
clear
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question_answer10)
In\[{{C}_{4}}\]plants,\[C{{O}_{2}}\]combine with PEP in presence of [CPMT 1990]
A)
PEP carboxylase done
clear
B)
RuBP carboxylase done
clear
C)
RuBP oxygenase done
clear
D)
Hydrogenase done
clear
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question_answer11)
\[C{{O}_{2}}\]joins the photosynthetic pathway during [CBSE PMT 1988]
A)
Light reaction done
clear
B)
Dark reaction done
clear
C)
Photosystem-I done
clear
D)
Photosystem-II done
clear
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question_answer12)
Dark reaction of photosynthesis is called so because [CPMT 1976; RPMT 1985;AMU 1988; JIPMER 1988; NCERT 1980]
A)
It can also occur in dark done
clear
B)
It does not require light energy done
clear
C)
Cannot occur during day time done
clear
D)
It occurs more rapidly in night done
clear
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question_answer13)
The initial enzyme of Calvin cycle is [BHU 1989, 90]
A)
Ribulose 1, 5 diphosphate carboxylase done
clear
B)
Triose phosphate dehydrogenase done
clear
C)
Phosphopentokinase done
clear
D)
Cytochrome oxidase done
clear
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question_answer14)
During photosynthesis when PGA is changed into phosphoglyceraldehyde, which of the following reaction occur [BHU 1980]
A)
Oxidation done
clear
B)
Reduction done
clear
C)
Electrolysis done
clear
D)
Hydrolysis done
clear
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question_answer15)
Ribulose diphosphate carboxylase enzyme catalyses the carboxylation reaction between [BHU 1979]
A)
Oxaloacetic acid and acetyl CoA done
clear
B)
\[C{{O}_{2}}\]and ribulose 1, 5 diphosphate done
clear
C)
Ribulose diphosphate and phosphoglyceraldehyde done
clear
D)
PGA and dihydroxy acetone phosphate done
clear
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question_answer16)
Calvin cycle occur in [BHU 1983; MP PMT 1996; BVP 2002]
A)
Chloroplasts done
clear
B)
Cytoplasm done
clear
C)
Mitochondria done
clear
D)
Glyoxisomes done
clear
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question_answer17)
During dark reaction of photosynthesis [CPMT 1985]
A)
Water split done
clear
B)
\[C{{O}_{2}}\]is reduced to organic compounds done
clear
C)
Chlorophyll is activated done
clear
D)
6 carbon sugar is broken down into 3 carbon sugar done
clear
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question_answer18)
Dark reaction of photosynthesis take place in [CPMT 1986, 90; RPMT 1995; MP PMT 2000]
A)
Grana done
clear
B)
Stroma done
clear
C)
Matrix done
clear
D)
Cytoplasm done
clear
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question_answer19)
In\[{{C}_{3}}\]plants, the first stable product of photosynthesis during dark reaction is [CPMT 1986, 90, 92; RPMT 1995; MP PMT 1987, 90, 2000; BHU 1995; CBSE PMT 1995; KCET 1998]
A)
3-phosphoglyceric acid done
clear
B)
Phosphoglyceraldehyde done
clear
C)
Maleic acid done
clear
D)
Oxaloacetic acid done
clear
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question_answer20)
For the reduction of one molecule of\[C{{O}_{2}}\]with water, the energy required is
A)
100 kcal done
clear
B)
110 kcal done
clear
C)
120 kcal done
clear
D)
210 kcal done
clear
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question_answer21)
Which part of the photosynthetic process does not require light and temperature dependent
A)
Hill's reaction done
clear
B)
Blackman's reaction done
clear
C)
Warburg's reaction done
clear
D)
Emmerson's reaction done
clear
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question_answer22)
Calvin cycle is [CPMT 1995]
A)
Dependent on light done
clear
B)
Not dependent on light done
clear
C)
Occurs in light done
clear
D)
None of these done
clear
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question_answer23)
How many Calvin cycle form one hexose molecule [CBSE PMT 1996, 2000]
A)
2 done
clear
B)
6 done
clear
C)
4 done
clear
D)
8 done
clear
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question_answer24)
\[C{{O}_{2}}\]acceptor in\[{{C}_{3}}\]plants is [CBSE PMT 1995, 96,99; CPMT 1999, 2001; RPMT 2002]
A)
Xylulose-5-phosphate done
clear
B)
3-phosphoglyceric acid done
clear
C)
Ribulose 1, 5 diphosphate done
clear
D)
Phosphoenol pyruvic acid done
clear
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question_answer25)
Which of the following is present in Calvin cycle [CBSE PMT 1996]
A)
Photophosphorylation done
clear
B)
Oxidative carboxylation done
clear
C)
Reductive carboxylation done
clear
D)
Oxidative phosphorylation done
clear
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question_answer26)
Carbon dioxide is fixed in [MP PMT 1999]
A)
Light reaction done
clear
B)
Dark reaction done
clear
C)
Aerobic respiration done
clear
D)
Anaerobic respiration done
clear
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question_answer27)
In which plant Calvin experimented by radioactive isotopy to discover the stable product of\[{{C}_{3}}\]cycle [Orissa JEE 2005]
A)
Chlorella done
clear
B)
Cycas done
clear
C)
Carrot done
clear
D)
Tobacco done
clear
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question_answer28)
The first stable compound of dark reaction of photosynthesis is [BVP 2000]
A)
Phosphoglyceraldehyde done
clear
B)
Phosphoglyceric acid done
clear
C)
Fractose done
clear
D)
Starch done
clear
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question_answer29)
The first step in dark reaction of photosynthesis is [CPMT 2004]
A)
Formation of ATP done
clear
B)
Ionization of water done
clear
C)
Attachment of \[C{{O}_{2}}\] to a pentose sugar done
clear
D)
Excitement of electron of chlorophyll by a photon of light done
clear
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question_answer30)
Mesophyll chloroplast of which plant alone is capable of synthesising starch or sucrose
A)
\[{{C}_{3}}\]plant done
clear
B)
\[{{C}_{4}}\]plant done
clear
C)
[a] and [b] both done
clear
D)
Neither\[{{C}_{3}}\]or\[{{C}_{4}}\] done
clear
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question_answer31)
Number of carboxylation occur in Calvin cycle, is [DPMT 2004]
A)
0 done
clear
B)
1 done
clear
C)
2 done
clear
D)
3 done
clear
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question_answer32)
Which of the following is required for conversion of 3PGAL and dihydroxy acetone phosphate to fructose 1, 6 diphosphate
A)
Transketolase done
clear
B)
Aldolase done
clear
C)
Phosphatase done
clear
D)
Hexokinase done
clear
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question_answer33)
Which of the following is the first compound that accepts carbon dioxide during dark phase of photosynthesis [BHU 2004]
A)
NADP done
clear
B)
RuBP done
clear
C)
Ferridoxin done
clear
D)
Cytochrome done
clear
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question_answer34)
Radioactive\[{{C}^{14}}\]is given to\[C{{O}_{2}}\]and released to atmosphere. This\[C{{O}_{2}}\]is taken by RuBP in a\[{{C}_{3}}\]plant. First radioactive\[{{C}^{14}}\]is seen in which compound [Manipal 2005]
A)
PGAL done
clear
B)
PEP done
clear
C)
RMP done
clear
D)
PGA done
clear
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