Important Questions for Class 11 Biology 13th Chapter Photosynthesis in Higher Plants MCQ, Very Short, Short Type, Long Type
CBSE Class 11 Important Questions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 13.
- MCQs
1) In plants glucose is usually stored as
(a) Starch
(b) Sucrose
(c) Glycogen
(d) All the above
2.) Assertion: maximum absorption by chlorophyll occurs in the blue and the red regions, also shows higher rate ofphotosynthesis.
Reason: Hence,chlorophyll a is the chief pigment associated with photosynthesis.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
3.) Assertion: In C4 plants photorespiration occur.
Reason: This is because theyhave a mechanism that increases the concentration of O2 at the enzymesite.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
4.) Assertion: Splitting of water molecules isassociated with PS II
Reason: this results in the release of O2, protons and transfer of electronsto PS I.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
5.) In Hatch and Slack Pathway, the primary CO2 acceptor is a
a.) phosphoenolpyruvate
b.) pyruvic acid
c.) acetyl CoA
d.) 2- phosphoglycolate
6.) Assertion: Chloroplasts function as the site of photosynthesis in eukaryotic photoautotrophs.
Reason: The membrane system is responsible for trapping the light energy and also for the generation of ATP and NADPH.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
7.) Assertion: Chloroplasts are dimorphic
Reason: the plant should have Kranz anatomy as seen in C4 plants
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false
8.) Which is not an example of accessory pigments?
a.) chlorophyll a
b.) chlorophyllb
c.) xanthophylls
d.) carotenoids
9.) The C4 pathway first generates the product
a.) 3-phosphoglyceric acid
b.) oxaloacetic acid
c.) ribulose bisphosphate
d.) glyceraldehyde 3 phosphate
10.) ATP synthesis occurs in what part of the enzyme
a) CF0
b) CF1
c) Both a) and b)
d) None of the above
- Answer in one sentence
Q.1) State the significance of photosynthesis.
Ans. Photosynthesis is significant for two reasons:
- It is the major source of all food on the planet.
- It is also in charge of green plants emitting oxygen into the environment.
Q.2) Describe the Light harvesting complex?
Ans. Within Photosystem I (PS I) and Photosystem II (PS II), the pigments are organized into two distinct photochemical light harvesting complexes (LHC).
Q.3) Name the pigments found in plants?
Ans. The 4 pigments found in plants include Chlorophyll a (bright or blue green), chlorophyll b (yellowgreen), xanthophylls (yellow) and carotenoids(yellow to yellow-orange).
Q.4) Name the stages of Calvin cycle.
Ans. The Calvin cycle has three stages: carboxylation, reduction, and regeneration.
Q.5) State the balance sheet for generation of 1 molecule of glucose.
Ans. Six cycles of the cycle are required to produce one molecule of glucose from 6 CO2, 18 ATP are used to generate 18 ADP and 12 NADP are produced from12 NADPH
Q.6) In what way are C4 plants different from C3 plants?
Ans. C4 plants are unique in that they have a unique leaf anatomy, can withstand higher temperatures, respond to high light intensities, lack photorespiration, and have better biomass yield.
Q.7) State the difference in proton concentration in photosynthesis and respiration.
Ans. The proton concentration in photosynthesis is towards the inner of the membrane, i.e., in the lumen of thylakoid. When electrons pass through the ETS during respiration, protons build in the inter membranous region of the mitochondria.
- Answer in short
Q.1) What is light and dark reaction?
Ans. 1.) Enzymatic reactions in the stroma produce sugar, which is then converted into starch.
2.) Because they are directly light-driven, it is referred to as light reactions (photochemical reactions).
3.) Theenzymatic reactions that are not directly driven by light, but rather rely on the results of light reactions (ATP and NADPH).
4.) As a result, to distinguish these reactions are commonly referred to as dark reactions (carbon reactions).
Q.2) Why is the splitting of water important?
Ans. 1.) Electrons that were transferred from photosystem II must be replaced.
2.) This is accomplished through the use of electrons liberated as a result of water splitting.
3.) The PS II is associated with water splitting; water is split into 2H+, [O], and electrons.
4.) One of the net products of photosynthesis is oxygen. Photosystem II provides the electrons required to replace those lost in photosystem I.
Q.3) Explain photo respiration in plants.
Ans. 1.) Some O2 binds to RuBisCO in C3 plants, CO2 fixation is reduced.
2.) Instead of being transformed to two molecules of PGA, RuBP interacts with O2
3.) This generates one molecule of phosphoglycerate and one molecule of phosphoglycolate (2 Carbon) in a process known as photorespiration.
Q.4) State the law of limiting factors?
Ans. 1.) When a number of factors influence any [bio]chemical process, Blackman’s (1905) Law of Limiting Factors takes effect.
2) The law states that: If a chemical process is affected by more than one component, the factor closest to its minimal value determines its rate
3) it is the factor that directly influences the process if its quantity is changed.
- Answer in brief
Q.1) Describe the T.W Engelmann’s experiment to determine spectrum of light.
Ans. 1.) T.W Engelmann’s carried experiments to determine spectrum of light.
2.) He separated light into its spectrum components with a prism and then illuminated a green alga, Cladophora, suspended in an aerobic bacteria culture.
3.) The microorganisms were employed to pinpoint the locations of O2 evolution.
4.) He discovered that bacteria accumulated primarily in the blue and red-light regions of the split spectrum.
5.) As a result, a first action spectrum of photosynthesis was characterized.
6.) It is similar to the absorption spectra of chlorophyll a and b.
Q.2) State the steps involved in transport to identify the stages that lead to the formation of a proton gradient
Ans. 1.) The splitting of the water molecule occurs on the inner side of the membrane, the protons or hydrogen ions produced by the splitting of the water molecule accumulate within the lumen of the thylakoids.
2) Protons are transferred across the membrane as electrons flow through the photosystems.
3) This occurs because the primary acceptor of electrons, which is located on the membrane’s outer side, transfers its electron to a H carrier rather than an electron carrier.
4) As a result, while transporting an electron, this molecule removes a proton from the stroma.
5) When this molecule transfers its electron to the electron carrier on the membrane’s inner side, the proton is released into the membrane’s inner or lumen side.
6) The NADP reductase enzyme is found on the membrane’s stroma side. Protons, along with electrons from PS I’s acceptor of electrons, are required for the reduction of NADP+ to NADPH+ H+. These protons are also taken out of the stroma.