IFS Botany (Mains): Questions 41 - 49 of 119

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Question number: 41

» Genetics, Molecular Biology and Evolution » Genetic Code

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Is the genetic code universal? (Paper 2, Section A)

Explanation

What is genetic code?

  • The set of DNA and RNA sequences that determine the amino acid sequences used in the synthesis of an organism’s proteins.

  • The set of 64 codons are corresponding to the 20 amino acids which are used for protein synthesis and as the signals for starting and… (290 more words) …

Question number: 42

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the different types of flagella found in fungi? (Paper A Section A)

Explanation

  • There are mainly two types of flagella;
Image showing flagella types.

Image Showing Flagella Types.

Based on cilia or hair and fibrils, flagella divided into two parts.

Tinsel type: Flagellum with a large number of hair like outgrowths (cilia) all around its surface.

Whiplash type: A long thread like structure being rigid at the… (143 more words) …

Question number: 43

» 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: 44

» Cryptogams » Algae

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the pigments that are found in red algae? (Paper A Section A)

Explanation

  • Red algae is also known as Rhodophyta and they are marine plants that live mainly in shallow waters and deep tropical seas and some are live in freshwater.
  • Red algae have no flagella and typically grow attached to a hard surface or on other algae.
 Image showing red algae.

Image Showing Red Algae.

Rhodophyta… (168 more words) …

Question number: 45

» Cryptogams » Bryophytes

Appeared in Year: 2014

Short Answer Question▾

Write in Short

What is the heterotrichous habit of moss protonema growth? (Paper A Section A)

Question number: 46

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

How significant is the parasexuality in Aspergillus? (Paper A Section A)

Explanation

Definition of parasexuality or parasexual cycle:

  • The parasexual cycle is defined as a cycle in which plasmogamy, karyogamy and meiosis take place but not at a specified time or at specified points in the life cycle of an organism.
  • In some fungi true sexual cycle comprising of nuclear fusion and… (175 more words) …

Question number: 47

» Cell Biology » Techniques

Appeared in Year: 2015

Short Answer Question▾

Write in Short

What are ‘carrier proteins’? Describe the ion uptake mechanism in plants mediated by carrier proteins. (Paper 2, Section B)

Question number: 48

» Morphogenesis » Tissue

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain to what extent has the technique of micropropagation been successful in achieving our goals. (Paper A Section A)

Explanation

  • The regeneration of whole plant through tissue culture is popularly called micropropagation.
  • This is a technique where a callus mass has been initiated from a single explant taken from any living part of a donor plant and within very short time and space, a large number of plantlets can be… (693 more words) …

Question number: 49

» Morphogenesis » Cell

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between prokaryote and eukaryote. (Paper A Section A)

Explanation

Prokaryotic cells:

Prokaryotic cells are ells without nucleus. The DNA in prokaryotic cells is in the cytoplasm rather than enclosed within a nuclear membrane. Prokaryotic cells are found in single celled organisms like bacteria and organisms with prokaryotic cells are called prokaryotes.

 Image showing Prokaryotic cell.

Image Showing Prokaryotic Cell.

Bacterial cell is prokaryotic… (448 more words) …

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