Physiology and Biochemistry [IFS (Forests Services) Botany (Mains)]: Questions 8 - 17 of 36

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Question number: 8

» Physiology and Biochemistry » Photosynthesis

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Phytochrome

Question number: 9

» Physiology and Biochemistry » Coenzymes

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Apoenzyme

Question number: 10

» Physiology and Biochemistry » Senescence

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Senescence

Question number: 11

» Physiology and Biochemistry » C and CAM Pathways

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Kranz anatomy (Paper 2)

Explanation

  • In dry tropical regions plants are adapted to have C4 pathway for photosynthesis.

  • C4 plants have special leaf anatomy. They tolerate high temperature, they show response in highlight intensities, they lack in a process of photorespiration and they also have high productivity.

  • There are large cells around the vascular bundles of the C4 pathway plants

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Question number: 12

» Physiology and Biochemistry » Respiration

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Describe bottom up regulation of plant respiration. (Paper 2)

Explanation

  • The breakdown of the C-C bonds of complex compounds thorough oxidation within the cells, leading to release of considerable amount of energy is called respiration. The compounds that are oxidised during this process are known as respiration substance.

  • During oxidation within a cell, all the energy contained in respiration substrates is released in a

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Question number: 13

» Physiology and Biochemistry » Fruit Ripening

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain various physiological processes that help in fruit ripening. How this knowledge help to overcome problems likely to be faced because of climate change? (Paper 2)

Explanation

  • Fruit ripening is a genetically programmed process lead by metabolic, enzymatic and physiological changes.

  • And hence different enzymne, nutrient, pigment and hormone mainly have role in ripening of fruit.

  • Some hydrolytic enzyme like polygalacturonase, cellulose, pectin methyl esterase increased at the time of fruit ripening.

  • Work of this enzyme is to

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Question number: 14

» Physiology and Biochemistry » Mineral Nutrients

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Brief note on Allelopathy. (Paper 2)

Explanation

  • It is a biological phenomenon. In which a plant or organism produces biochemical that influence the germination growth, survival and reproduction of other organism.

  • These biochemical can be beneficial or have negative effect on other organism and plant community. Allelochemicals are type of secondary metabolites and the allelochemicals which have ne

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Question number: 15

» Physiology and Biochemistry » Fermentation-Electron Transport Chain

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write a brief note on Fermentation. (Paper 2)

Explanation

  • Fermentation is the incomplete oxidation of glucose is achieved under anaerobic conditions by sets of reactions where pyruvic acid is converted to CO2 and ethanol.

  • The enzymes, pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reaction. Some bacteria also form lactic acid and pyruvic acid. Also in some animal cell like muscles duri

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Question number: 16

» Physiology and Biochemistry » Chemiosmotic Theory

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Describe the process explained by chemiosmosis theory. (Paper 2)

Explanation

  • Chemiosmosis hypothesis put forward to explain the mechanism of ATP synthesis in the chloroplast.

  • In photosynthesis ATP synthesis is linked to development of a proton gradient across a membrane (these membrane of the thylakoid)

  • The processes that take place during the activation of electrons and their transport cause a proton gradient to develop

  • Since

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Question number: 17

» Physiology and Biochemistry » Ion Transport

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

What are ‘carrier proteins’? Describe the ion uptake mechanism in plants mediated by carrier proteins. (Paper II)

Explanation

Carrier proteins

  • Carrier protein allows the diffusion of larger polar molecules such as sugar and amino acids.

  • Molecule attaches to the carrier protein at its binding site this changes the shape of the protein and the molecule is delivered through the membrane.

  • Carrier protein transports the molecule in and out of the cell.

  • The carrier proteins facilit

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