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Free download in PDF Photosynthesis and Respiration Multiple Choice 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.
(1)
In photosynthesis dark reaction, is called so because-
[A]
It occurs in dark
[B]
It does not require light energy
[C]
It cannot occur during daytime
[D]
It occurs more rapidly at night
Answer: It does not require light energy
(2)
Photosynthesis is a _____ process.
[A]
Catabolic
[B]
Anabolic
[C]
Exothermic
[D]
Metabolic
(3)
Quantasomes are found in:
[A]
Cristae of mitochondria
[B]
Thylakoid membrane of chloroplasts
[C]
Nucleus membrane
[D]
Lysosome
Answer: Thylakoid membrane of chloroplasts
(4)
Which of the following statements are true regarding Photosystems?
[A]
Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids
[B]
Many Prokaryotes have only one photosystem
[C]
Both A and B are correct
[D]
Only A is correct
Answer: Both A and B are correct
(5)
Respiration is
[A]
Anabolic process
[B]
Exothermic process
[C]
Endothermic process
[D]
Endergonic process
Answer: Exothermic process
(6)
Kreb’s cycle take place in
[A]
vesicles of ER
[B]
Mitochondrial matrix
[C]
lysosomes
[D]
Dictyosomes
Answer: Mitochondrial matrix
(7)
Photorespiration involves
[A]
Glycolate cycle
[B]
kreb’s cycle
[C]
calvin cycle
[D]
CAM cycle
(8)
During respiration yeast converts glucose to
[A]
ethanol and water
[B]
ethanol and oxygen
[C]
ethanol and CO2
[D]
lactic acid and CO2
(9)
The net gain of ATP produced during the oxidation of one glucose molecule in a plant cell
[A]
38 ATP molecules
[B]
30 ATP molecules
[C]
36 ATP molecules
[D]
24 ATP molecules
(10)
Name the physiochemical process in which chemical energy is produced by light energy with the help of a photosynthetic organism?
[A]
Photosynthesis
[B]
Respiration
[C]
Oxidative decarboxylation
[D]
Oxidative phosphorylation
(11)
Which of the following is not a lipid-soluble photosynthetic pigment?
[A]
Phycobilins
[B]
Carotenoids
[C]
Chlorophyll
[D]
Xanthophylls
(12)
Name the pigment which is responsible for the yellow color of leaves in autumn and orange color of carrots?
[A]
Phycobilins
[B]
Chlorophylls
[C]
Carotenoids
[D]
Bacteriochlorophyll
(13)
Name the photosynthetic pigment which is structurally similar to bile pigment bilirubin?
[A]
Chlorophyll
[B]
Carotene
[C]
Xanthophyll
[D]
Phycobilins
(14)
If photosynthesizing green algae are provided with CO 2 synthesized with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. That one is
[A]
PGA
[B]
PGAL
[C]
RuBP
[D]
O2
(15)
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
[A]
CO2 and glucose
[B]
H2O and O2
[C]
ADP, Pi, and NADP+
[D]
ATP and NADPH
(16)
What wavelength of light in the figure is most effective in driving photosynthesis?
[A]
420 mm
[B]
475 mm
[C]
575 mm
[D]
625 mm
(17)
In the thylakoid membranes, what is the main role of the antenna pigment molecules?
[A]
split water and release oxygen to the reaction-center chlorophyll
[B]
harvest photons and transfer light energy to the reaction-center chlorophyll
[C]
synthesize ATP from ADP and Pi
[D]
None of above
Answer: harvest photons and transfer light energy to the reaction-center chlorophyll
(18)
Which statement describes the functioning of photosystem II?
[A]
Light energy excites electrons in the electron transport chain in a photosynthetic unit
[B]
The excitation is passed along to a molecule of P700 chlorophyll in the photosynthetic unit
[C]
The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP +
[D]
The electron vacancies in P680 are filled by electrons derived from water
Answer: The electron vacancies in P680 are filled by electrons derived from water
(19)
What are the products of linear photophosphorylation?
[A]
heat and fluorescence
[B]
ATP and P700
[C]
ATP and NADPH
[D]
all of the above
(20)
What does the chemiosmotic process in chloroplasts involve?
[A]
establishment of a proton gradient
[B]
diffusion of electrons through the thylakoid membrane
[C]
reduction of water to produce ATP energy
[D]
movement of water by osmosis into the thylakoid space from the stroma
Answer: establishment of a proton gradient
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