Physiology and Biochemistry (IFS Botany): Questions 1 - 7 of 7

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Question number: 1

» Physiology and Biochemistry » Storage and Germination of Seed

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Trace the physiological changes associated with the process of seed germination. How is the process of germination regulated by phytohormones? (Paper 2, Section B)

Explanation

Definition of seed germination:

  • The process where the seed sprouts for growing and developing into a plant is called as seed germination.
  • The start of the development of plant from seed is called seed germination.

Physiological changes:

  • A typical seed stores carbohydrates, lipids and proteins for germination.
  • As a result… (373 more words) …

Question number: 2

» Physiology and Biochemistry » Stress Physiology

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write brief notes on: What is ‘triple response growth’? How is it induced? (Paper 2, Section B)

Explanation

Triple response caused by the plant hormone ethylene and plant has a decrease in longitudinal growth and a switch to horizontal growth.

Ethylene removes this auxin imbalance and helps the seedling to grow properly.

How triple response induced:

Ethylene is a phytohormone or hormone which is produced in the plant… (69 more words) …

Question number: 3

» Physiology and Biochemistry » Fermentation-Electron Transport Chain

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write brief notes on the following in about 150 words each: Fermentation (Paper 2, Section B)

Explanation

  • Fermentation is a natural process. People applied fermentation to make products such as wine, mead, cheese and beer long before the biochemical process was understood.

  • In the 1850s and 1860s Louis Pasteur became the first scientist to study fermentation when he demonstrated fermentation was caused by living cells.

  • He also… (409 more words) …

Question number: 4

» Physiology and Biochemistry » Secondary Metabolites

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Describe various structural and chemical defence mechanisms developed by plants. (Paper 2, Section B)

Explanation

  • Plants need to protect themselves from various threats.
  • So, some plants have modified parts that are used for defence.
  • These defense mechanisms are used to protect plants from herbivorous animals and insects and also from insects laying eggs on the plant.

Structural Defense Mechanisms

Microscopy visible structural characteristics present on… (905 more words) …

Question number: 5

» Physiology and Biochemistry » Growth Substances

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write brief notes on the following in about 150 words each: Allelopathy (Paper 2, Section B)

Explanation

  • Allelopathy is the suppression of growth of one plant species by another or same species due to the release of toxic substances.
  • Allelopathy is a biological phenomenon where one plant inhibits the growth of another.
  • Through the release of allelochemicals, certain plants can greatly affect the growth of other plants… (552 more words) …

Question number: 6

» Physiology and Biochemistry » Fruit Ripening

Appeared in Year: 2014

Essay Question▾

Describe in Detail

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

Explanation

  • Ethylene is a natural plant hormone associated with the growth, development, ripening and aging of many plants.

  • This phytohormone is said to promote ripening in a variety of fruits including bananas, pineapples, tomatoes, mangoes, melons, and papayas.

  • It is produced in varying quantities depending on the type of fruit. But… (571 more words) …

Question number: 7

» Physiology and Biochemistry » Chemiosmotic Theory

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Describe the process explained by chemiosmotic theory. (Paper 2, Section B)

Explanation

Chemiosmosis is the process by which chemical ions move from an area of high concentration to an area of low concentration across a selectively permeable membrane.

  • Chemiosmosis is the process by which ATP, or adenosine triphosphate, is synthesized.

  • The chemiosmotic hypothesis was proposed by Peter D. Mitchell in 1961. In… (464 more words) …

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