CBSE Questions for Class 11 Medical Biology Photosynthesis In Higher Plants Quiz 11 - MCQExams.com

Genotypically the pollen grains produced by an anther belong to.
  • One type
  • Two types
  • Many types
  • All the above
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $$CO_2$$ and $$H_2O$$ yields $$686$$kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is $$12$$kcal?
  • $$1$$
  • $$2$$
  • $$30$$
  • $$57.1$$
Which of the following is required both during photosynthesis and respiration?
  • Phytochrome
  • Cytochrome
  • Chlorophyll
  • Glucose
Karnz anatomy occurs in
  • Citrus indica
  • Mangifera indica
  • Zea mays
  • Euphorbia hirta
Calvin cycle has three stages.
$$1$$. Reduction during which carbohydrate is formed at the expense of photochemically made ATP and NaDPH.
$$2$$. Regeneration during which carbon dioxide acceptor $$1, 5$$-RuBP is formed.
$$3$$. Carboxylation during which $$CO_2$$ combines with $$1, 5-$$RuBP.
Identify the correct sequence.
  • $$3, 1, 2$$
  • $$3, 2, 1$$
  • $$1, 2, 3$$
  • $$2, 1, 3$$
In the process of ATP synthesis, oligomycin and DCCD act at which place in figure:
698106_b202840c1c184294b3d75fe1ce011cc4.JPG
  • A
  • B
  • C
  • D.
Which of the following step of photosynthesis is not directey involve in ATP synthesis or consumption?
  • Corboxylation of dark Rection
  • Reduction of dark reaction
  • Cyclic photo phosphorylation of light reaction
  • Regeneration of dark reaction
ATP is known as energy currency of a cell. ATP is synthesized from ADP and Pi. The reaction is catalyzed by an enzyme called as ATP synthase. When the enzyme and substrate (ADP) are distant inside the cell, the reaction cannot take place spontaneously. Which of the following statements best explains the cause for the ATP synthase and ADP to interact?
  • Electronegativity of ADP attracts ATP synthase
  • ADP will be actively pumped to ATP synthase
  • Random movements will bring ADP to ATP synthase
  • ADP and ATP synthase always remain bound to oxysomes
Tropical plant like sugarcane show high efficiency of $$CO_{2}$$ fixation because of
  • TCA cycle
  • Calvin cycle
  • Hatch and Slack cycle
  • EMP pathway
Consider the following processes.
a. $$O_2$$ evolution
b. $$CO_2$$ fixation
c. NADPH formation
d. Chlorophyll biosynthesis.
Which of these do not occur in thylakoids?
  • $$1$$ and $$2$$
  • $$2$$ and $$3$$
  • $$3$$ and $$4$$
  • $$2$$ and $$4$$
Match List I (scientist) with List II (Isotope Used) and selct the correct answer using the code given below the lists:
List IList II
A.Calvin1.180
B.Ruben and Kamen2.32p
C.Volkin and Astrachan3.14C
D.Meselson and stahl4.15N
  • A-3, B-2, C-1, D-4
  • A-4, B-1, C-2, D-3
  • A-4, B-2, C-1, D-3
  • A-3, B-1, C-2, D-4
How many times the calvin cycle occur to produce two molecules of sucrose _________.
  • $$6$$
  • $$12$$
  • $$18$$
  • $$24$$
The idea that pH gradients could provide energy for ATP formation in chloroplasts and mitochondria was first proposed by ____________.
  • Bassham
  • Hill
  • Mitchell
  • Thompson
A universal hydrogen acceptor in an electron transport system is ___________.
  • ATP
  • UDP
  • NAD
  • FMN
The Mitchell or charismatic hypothesis predicts the __________________________.
  • Existence of a higher pH in the endoplasmic reticulum than in the cytosol
  • Symmetrical distribution of ATPase of the inner membrane of the mitochondria
  • Synthesis of ATP as protons flow along a gradient across inner mitochondrial membrane
  • Absence of ATPase in the inner mitochondrial membrane
The following enzymes participate in the initial $$CO_2$$ fixation through Calvin cycle.
a. RUBISCO
b. Trios phosphate dehydrogenate
c. Phosphglyceric kinas
The correct sequence in which these enzymes participation in $$CO_2$$ fixation is?
  • $$1, 3, 2$$
  • $$2, 3, 1$$
  • $$1, 2, 3$$
  • $$3, 2, 1$$
Consider the following events.
Excitation of chlorophyll
Light absorption
Transfer of electron
Synthesis of ATP
The correct sequence of these events in photosynthesis is?
  • $$1, 2, 4, 3$$
  • $$2, 1, 4, 3$$
  • $$2, 1, 3, 4$$
  • $$1, 2, 3, 4$$
Match List-I(Physiological events) with List II(Name of plants) and select the correct answer.
List IList II
a. $$C_3$$ pathway of $$CO_2$$ fixation$$1$$. Bryophyllum sp.
b. $$C_4$$ pathway of $$CO_2$$ fixation$$2$$. Zea mays
c. CAM pathway of $$CO_2$$ fixation$$3$$. Triticum aestivum
d. Guttation$$4$$. Lycopeticon
  • A-$$2$$, B-$$3$$, C-$$4$$, D-$$1$$
  • A-$$2$$, B-$$3$$, C-$$1$$, D-$$4$$
  • A-$$3$$, B-$$2$$, C-$$4$$, D-$$1$$
  • A-$$3$$, B-$$2$$, C-$$1$$, D-$$4$$
RuBP carboxyl's is a less efficient enzyme for $$CO_2$$ fixation in photosynthesis than PEP carbonyls because ________________.
  • RuBP is less predominant than PEP in a mesophyll cell
  • RuBP is a $$4$$-carbon sugar phosphate while PEP is a phosphorylated $$3$$-carbon organic acid
  • Km value of RuBP carboxyl's for $$CO_2$$ is higher than that of PEP carboxyl's
  • The molecular weight of RuBP carboxyl's is larger than that of PEP carboxyl's
Photosynthetic oxygen producing cells differ from non-oxygen producing cells in that the former.
  • Produce one ATP whereas the latter produce two
  • Produce no NADPI-$$1$$ whereas the latter do
  • Reduce ferredoxin whereas the latter do not
  • Contain and use both photo systems I and II
During photorespiration, in Plants, ribulose bisphosphate is degraded to carbon dioxide after combining with oxygen. The correct sequence in which these products appear from ribulose bisphosphate in photorespiratory pathway, is?
  • Serine, glyoxylate, glycine, glycolate
  • Glycolate, glyoxylate, glycine, Serine
  • Glycine, serine, glycolate, glyoxylate
  • Glyoxylate, glycolate, serine, glycine
Consider the following statements.
a. PEP carboxylase has a high specificity for carbon dioxide and it never picks up oxygen
b. Kranz anatomy and $$C_4$$ metabolism are found in only monocots of hot climates and hot in dicots.
Which of the statements given is/are correct?
  • $$1$$ only
  • $$2$$ only
  • Both $$1$$ and $$2$$
  • Neither $$1$$ nor $$2$$
Which one of the following is the correct sequence of the appearance of intermediate compounds in the pathway of photorespiration?
  • Glyoxylate-glycine-glycolate-serine
  • Glyoxylate-serine-glycolate-glycine
  • Glycolate-glyoxylate-glycine-serine
  • Glycolate-glyoxylate-serine-glycine
Chemiosmosis refers to the view that an ion flowing down its electrochemical gradient drives ATP synthesis. The ion in question is?
  • Phosphate
  • Sodium
  • Iron
  • Hydrogen
With reference to photosynthesis, what is the $$CF_0$$ - $$CF_1$$ complex?
  • ATP synthetase
  • Ferredoxin-NADP reductase
  • Cytochrome $$b6$$/f complex
  • RuBP carboxylase
Which one of the following statements is correct?
  • Deuterium is used less frequently in biochemistry than tritium because greater radiation precaution is required to be taken while using deuterium
  • Tritium carbon-$$14$$ and phosphorous-$$32$$ are all beta particle emitters
  • The transference of label from a tritium labelled substance to other hydrogen compounds never occurs
  • Gamma radiation does not ionize the contents of cells but damages the tissue solely by virtue of the heating effect
The primary reaction in photosynthesis is photochemical and takes place in the chloroplast. It is accomplished by a chain of electron carriers with phosphorylation of ADP to ATP. The actual site for this reaction is?
  • Intrathylakoid space
  • Thylakoid membrane
  • Chloroplast envelope
  • Stoma
With reference to photosynthesis in chloroplasts, consider the following statements.
a. The reactions that break down water and produce oxygen are located on the lumen side of the thylakoid membrane, in granum areas.
b. The molecules of ferredoxin-NADP re-educate that generate NADPH are located on the side of the membrane facing stroma.
Which of the statements given is/are correct?
  • $$1$$ only
  • $$2$$ only
  • Both $$1$$ and $$2$$
  • Neither $$1$$ nor $$2$$
Match List I with List II and select the correct answer using the codes given the lists.
List-IList-II
a. Chloride$$1$$. Essential for the biosynthesis of insole $$3$$ acetic acid
b. Zinc$$2$$. Enzyme activator for Photolysis
c. Boron$$3$$. Necessary for translocation of sugars
  • A-$$1$$, B-$$2$$, C-$$3$$
  • A-$$2$$, B-$$1$$, C-$$3$$
  • A-$$2$$, B-$$3$$, C-$$1$$
  • A-$$3$$, B-$$1$$, C-$$2$$
Mitochondrial morphology is maintained by balancing the active absorption of water and active secretion by the mitochondrion. Hence mitochondria are likely to swell in the presence of.
  • ATP
  • Hypertonic solution
  • Uncoupling agent
  • Enzymes catalyst oxidative phosphorylation
How many molecules of water would be consumed to support one Calvin cycle?
  • One
  • Two
  • Four
  • Six
Direct gain of ATP from one mole of glucose during glycolysis or EMP pathaway ____________.
  • 2 ATP
  • 6 ATP
  • 36 ATP
  • 38 ATP
Trios phosphate dehydrogenises in glycolysis and Calvin cycle are NOT exactly identical enzymes because.
  • These are separated compartmentally
  • Glycols takes place both in light and darkness while Calvin cycle does not require light
  • In glycolysis, it is NAD-linked, while in Calvin cycle, it is NADP-linked
  • In glycolysis it is associated with catabolic reactions, while in Calvin cycle it is associated with anabolism
Double fixation of $$CO_2$$ take place both in $$C_4$$ and CAM plants. Which one of the following statements brings out the main difference between the two?
  • The two carboxyl sing enzymes in two plants are different
  • $$CO_2$$ fixation in $$C_4$$ plants is separated by space, whereas in CAM plants, it is separated by time
  • The two pathways of $$CO_2$$ fixation are different in these two plants
  • The compensation points in these two plants are different
When the separation of photosynthetic pigments is carried out using a strip of chromatographic paper, then the dried strip shows four distinct bands P, Q, R and S as shown in the given figure. Identify them and select the correct option.

770826_66e81a3e14314ca98a18242cea9e7b51.png
  • P-Chl. a, Q-Chl b, R-Carotene, S-Xanthophyll
  • P-Xanthophyll, Q-Carotene, R-Chl. b, S-Chl. a
  • P-Carotene, Q-Xanthophyll, R-Chl. a, S-Chl. b
  • P-Chl. b, Q-Chl. a, R-Xanthophyll, S-Carotene
Choose the correct answer from the alternatives given.
In $$C_4$$ plants, $$CO_2$$ acceptor is
  • malate
  • pyruvate
  • aspartate
  • phosphoenol pyruvate
Fixation of one $$CO_{2}$$ molecule through Calvin cycle requires
  • $$1$$ ATP and $$2NADPH_{2}$$
  • $$2$$ ATP and $$2NADPH_{2}$$
  • $$3$$ ATP and $$2NADH_{2}$$
  • $$2$$ ATP and $$1NADPH_{2}$$
In non-cyclic photophosphorylation, FeS protein complex acts as:
  • Mobile e-carrier
  • Mobile H-carrier
  • Primary e-acceptor for PS-II
  • Primary e-acceptor for PS-I
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $$CO_{2}$$ and $$H_{2}O$$ yields $$686\ kcal$$ and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is $$12\ kcal$$?
  • Two
  • Thirty
  • Fifty seven
  • One
How many ATP molecules could maximally be generated from on molecule of glucose, if the complete oxidation of one mole of glucose to $$C{ O }_{ 2 }$$ and $$H_{ 2 }O$$ yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?
  • $$\displaystyle Two$$
  • $$\displaystyle Thirty$$
  • $$\displaystyle Fifty \ seven$$
  • $$\displaystyle One$$
If $$^{14}CO_2$$ is added to a suspension of photosynthesizing chloroplasts, which of the following will be the first compound to be radioactive?
  • ATP
  • NADPH
  • NADH
  • $$3$$-phosphor glycerate
Which one of the following options is true in photsynthesis.
  • $$CO_2$$ is oxidized and $$ H_2O $$ is reduced
  • $$H_2O $$is oxidized and $$CO_2 is reduce d$$
  • Both $$CO_2$$ and $$H_2O$$ are reducedd
  • Both $$CO2$$ and$$ H2O$$ are oxidized
Kranz anatomy is observed in
  • C$$_2$$ Plant
  • C$$_3$$ Plant
  • C$$_4$$ Plant
  • CAM Plant
The first $$CO_2$$ acceptor in $$C_4$$ cycle is
  • RUBP
  • PGA
  • OAA
  • PEP
If $$8$$ carbon atoms are deviated from the Calvin cycle in photorespiration, then what is the total carbon loss that occurs at the end of the reaction?
  • $$100$$%
  • $$75$$%
  • $$25$$%
  • $$0$$%
In $${C}_{4}$$ plants, chloroplasts of mesophyll cells and bundle sheath cells are specialised to perform respectively:
  • Light reaction and dark reaction
  • Dark reaction and light reaction
  • Light reaction and photorespiration
  • Photorespiration and dark reaction
Which of the following molecules is a primary acceptor of $$CO_2$$ in $$C_4$$ cycle?
  • Pyruvate
  • $$3$$-phosphoglycerate
  • Phosphoenol pyruvic acid
  • Oxaloacetate
State whether the following statement is true or false:
Plants do not respire whereas animals do.
  • True
  • False
Are the following statements true or false. Give reason in support of your answer.
If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will fail to occur.
  • True
  • False
The energy-carrying compound in the living cell is ATP.
  • True
  • False
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