Can girdling experiments be done
Question: Can girdling experiments be done in monocots? If yes, how? If no, why not? Solution: No. The monocot stem is scattered over all of the widths of the trunk by vascular bundles. So, we cant reach a particular band of girdling phloem....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{-\sin x+2 \cos x}{2 \sin x+\cos x} d x$ Solution: Assume $2 \sin x+\cos x=t$ $d(2 \sin x+\cos x)=d t$ $(2 \cos x-\sin x) d x=d t$ Put $t$ and dt in given equation we get $\Rightarrow \int \frac{\mathrm{d} t}{t}$ $=\ln |t|+c$ But $t=2 \sin x+\cos x$ $=\ln |2 \sin x+\cos x|+c$...
Read More →a. NADP reductase enzyme is located on _________________.
Question: a. NADP reductase enzyme is located on _________________. b. Breakdown of proton gradient leads to release of _________________. Solution: (a) Outer side of thylakoid membrane (Grana-lamella) (b) ATP molecules...
Read More →Cyanobacteria and some other photosynthetic bacteria
Question: Cyanobacteria and some other photosynthetic bacteria dont have chloroplasts. How do they conduct photosynthesis? Solution: In the inner membrane of cyanobacteria, they have folds to take place the photosynthesis. Bluish pigment phycocyanin is there to take photo-synthesis with solar energy....
Read More →2H2O 4H+ + O2 + 4e– Based on the above equation, answer the following questions:
Question: 2H2O 4H++ O2+ 4e Based on the above equation, answer the following questions: a. Where does this reaction take place in plants? b. What is the significance of this reaction? Solution: a. It takes place in PS II which is a decomposition reaction of the water molecule. b. Splitting of water continuously provides electrons to the electron transport chain; further steps of photosynthesis....
Read More →Differentiate:
Question: Differentiate: $\left(x^{2}+2 x-3\right)\left(x^{2}+7 x+5\right)$ Solution: To find: Differentiation of $\left(x^{2}+2 x-3\right)\left(x^{2}+7 x+5\right)$ Formula used: (i) (uv)' $=u^{\prime} v+u v^{\prime}$ (Leibnitz or product rule) (ii) $\frac{d x^{n}}{d x}=n x^{n-1}$ Let us take $u=\left(x^{2}+2 x-3\right)$ and $v=\left(x^{2}+7 x+5\right)$ $u^{\prime}=\frac{d u}{d x}=\frac{d\left(x^{2}+2 x-3\right)}{d x}=2 x+2$ $v^{\prime}=\frac{d v}{d x}=\frac{d\left(x^{2}+7 x+5\right)}{d x}=2 x+7...
Read More →When CO2 is added to PEP,
Question: When CO2 is added to PEP, the first stable product synthesised is: a. Pyruvate b. Glyceraldehyde-3-phosphate c. Phosphoglycerate d. Oxaloacetate Solution: Option (d)Oxaloacetateis the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{1}{\cos (x+a) \cos (x+b)} d x$ Solution: Let $I=\int \frac{1}{\cos (x+a) \cos (x+b)} d x$ Dividing and multiplying I by $\sin (a-b)$ we get, $I=\frac{1}{\sin (a-b)} \int \frac{\sin (a-b)}{\cos (x+a) \cos (x+b)} d x$ $I=\frac{1}{\sin (a-b)} \int \frac{\sin \{(x+a)-(x+b)\}}{\cos (x+a) \cos (x+b)} d x$ $I=\frac{1}{\sin (a-b)} \int \frac{\sin (x+a) \cos (x+b)-\cos (x+a) \sin (x+b)}{\cos (x+a) \cos (x+b)} d x$ $I=\frac{1}{\sin (a-b)} \int\{\tan ...
Read More →The reaction that is responsible
Question: The reaction that is responsible for the primary fixation of CO2 is catalysed by a. RuBP carboxylase b. PEP carboxylase c. RuBP carboxylase and PEP carboxylase d. PGA synthase Solution: Option (c)RuBP carboxylase and PEP carboxylase is the answer....
Read More →The enzyme that is not found in a C3 plant is
Question: The enzyme that is not found in a C3 plant is a. RuBP Carboxylase b. PEP Carboxylase c. NADP reductase d. ATP synthase Solution: Option (b)PEP Carboxylase is the answer...
Read More →The correct sequence of flow of electrons
Question: The correct sequence of flow of electrons in the light reaction is a. PSII, plastoquinone, cytochromes, PSI, ferredoxin b. PSI, plastoquinone, cytochromes, PSII, ferredoxin c. PSI, ferredoxin, PSII, d. PSI, plastoquinone, cytochromes, PSII, ferredoxin Solution: Option (a)PSII, plastoquinone, cytochromes, PSI, ferredoxin is the answer....
Read More →Differentiate:
Question: Differentiate: $\left(x^{2}-4 x+5\right)\left(x^{3}-2\right)$ Solution: To find: Differentiation of $\left(x^{2}-4 x+5\right)\left(x^{3}-2\right)$ Formula used: (i) (uv) $^{\prime}=u^{\prime} v+u v^{\prime}$ (Leibnitz or product rule) (ii) $\frac{d x^{n}}{d x}=n x^{n-1}$ Let us take $u=\left(x^{2}-4 x+5\right)$ and $v=\left(x^{3}-2\right)$ $u^{\prime}=\frac{d u}{d x}=\frac{d\left(x^{2}-4 x+5\right)}{d x}=2 x-4$ $v^{\prime}=\frac{d v}{d x}=\frac{d\left(x^{3}-2\right)}{d x}=3 x^{2}$ Putt...
Read More →Splitting of water is associated with
Question: Splitting of water is associated with a. Photosystem I b. The lumen of thylakoid c. Both Photosystem I and II d. The inner surface of the thylakoid membrane Solution: Option (d)The inner surface of the thylakoid membrane is the answer....
Read More →PEP is the primary CO2 acceptor in
Question: PEP is the primary CO2 acceptor in a. C4 plants b. C3 plants c. C2 plants d. Both C3 and C4 plants Solution: Option (a)C4 plantsb is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{\cos 2 x+x+1}{x^{2}+\sin 2 x+2 x} d x$ Solution: Assume $x^{2}+\sin 2 x+2 x=t$ $d\left(x^{2}+\sin 2 x+2 x\right)=d t$ $(2 x+2 \cos 2 x+2) d x=d t$ $2(x+\cos 2 x+1) d x=d t$ $(x+\cos 2 x+1) d x=\frac{1}{2} d t$ Put $t$ and $d t$ in given equation we get $\Rightarrow \frac{1}{2} \int \frac{d t}{t}$ $=\frac{1}{2} \ln |t|+c$ But $t=x^{2}+\sin 2 x+2 x$ $=\frac{1}{2} \ln \left|x^{2}+\sin 2 x+2 x\right|+c$...
Read More →The dark reaction in photosynthesis
Question: The dark reaction in photosynthesis is called so because of a. It can occur in dark also b. It does not depend on light energy c. It cannot occur during daylight d. It occurs more rapidly at night Solution: Option (b)It does not depend on light energy is the answer....
Read More →During light reaction in photosynthesis,
Question: During light reaction in photosynthesis, the following are formed: a. ATP and sugar b. Hydrogen, O2 and sugar c. ATP, hydrogen and O2 d. ATP, hydrogen and O2 donor Solution: Option (c)ATP, hydrogen and O2is the answer....
Read More →The energy required for ATP synthesis
Question: The energy required for ATP synthesis in PSII comes from a. Proton gradient b. Electron gradient c. Reduction of glucose d. Oxidation of glucose Solution: Option (a)Proton gradientis the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{2 \cos x-3 \sin x}{6 \cos x+4 \sin x} d x$ Solution: Taking 2 common in denominator we get $\Rightarrow \int \frac{2 \cos x-3 \sin x}{2(3 \cos x+2 \sin x)} d x$ Now assume $3 \cos x+2 \sin x=t$ $(-3 \sin x+2 \cos x) d x=d t$ Put $t$ and dt in given equation we get $\Rightarrow \frac{1}{2} \int \frac{\mathrm{dt}}{\mathrm{t}}$ $=\frac{1}{2} \ln |\mathrm{t}|+\mathrm{c}$ But $t=3 \cos x+2 \sin x$ $=\frac{1}{2} \ln |3 \cos x+2 \sin x|+c$...
Read More →Chemosynthetic bacteria obtain energy fro
Question: Chemosynthetic bacteria obtain energy from a. Sun b. Infrared rays c. Organic substances d. Inorganic chemicals Solution: Option (d) Inorganic chemicalsis the answer....
Read More →Differentiate:
Question: Differentiate: $(3 x-5)\left(4 x^{2}-3+e^{x}\right)$ Solution: To find: Differentiation of $(3 x-5)\left(4 x^{2}-3+e^{x}\right)$ Formula used: (i) (uv)' $=u^{\prime} v+u v^{\prime}$ (Leibnitz or product rule) (ii) $\frac{d x^{n}}{d x}=n x^{n-1}$ (iii) $\frac{d e^{x}}{d x}=e^{x}$ Let us take $u=(3 x-5)$ and $v=\left(4 x^{2}-3+e^{x}\right)$ $u^{\prime}=\frac{d u}{d x}=\frac{d(3 x-5)}{d x}=3$ $v^{\prime}=\frac{d v}{d x}=\frac{d\left(4 x^{2}-3+e^{x}\right)}{d x}=\left(8 x+e^{x}\right)$ Put...
Read More →Which light range is least effective
Question: Which light range is least effective in photosynthesis? a. Blue b. Green c. Red d. Violet Solution: Option (b) Green is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{e^{2 x}}{e^{2 x}-2} d x$ Solution: Assume $e^{2 x}-2=t$ $d\left(e^{2 x}-2\right)=d t$ $\Rightarrow 2 e^{2 x} d x=d t$ $\Rightarrow e^{2 x} d x=\frac{d t}{2}$ Put $\mathrm{t}$ and $\mathrm{dt}$ in the given equation we get $\Rightarrow \frac{1}{2} \int \frac{\mathrm{dt}}{\mathrm{t}}$ $=\frac{1}{2} \ln |\mathrm{t}|+\mathrm{c}$ But $t=e^{2 x}-2$ $=\frac{1}{2} \ln \left|e^{2 x}-2\right|+c$...
Read More →Which range of wavelength (in nm)
Question: Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)? a. 100 390 b. 390 430 c. 400 700 d. 760 100,00 Solution: Option (c)400 700 is the answer....
Read More →Which pigment acts directly to convert
Question: Which pigment acts directly to convert light energy to chemical energy? a. Chlorophyll a b. Chlorophyll b c. Xanthophyll d. Carotenoid Solution: Option (a)Chlorophyll a is the answer....
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