Optionals IAS Mains Botany: Questions 303 - 311 of 422

Access detailed explanations (illustrated with images and videos) to 422 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 900.00 -OR-

How to register? Already Subscribed?

Question 303

Edit

Appeared in Year: 2016

Write in Short

Short Answer▾

Describe the structure of N2ase.

Question 304

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

Discuss the significance of different carbon fixation pathways in plants.

Explanation

Carbon Fixation Pathways in Plants

  • Carbon fixation is the process in with inorganic carbon is added into organic molecule. it is a light independent process.
  • There is different pathway for carbon fixation and they individually have their own significance.

Calvin Cycle

  • Calvin cycle in most simple way of carbon fixation and consume least energy as no spe

… (165 more words) …

Question 305

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

Explain the applications of t and z tests. Discuss the significance of normal, binomial and Poison distributions of biological data.

Explanation

Application of T Test

“It is a method of testing hypothesis about the mean of small sample drawn from a normally distributed population when the standard deviation for the sample is unknown. “

  • It is used in calculation of a confidence interval for a sample mean.
  • Also used to test whether a sample mean is different from a hypothesized value.
  • Used to com

… (197 more words) …

Question 306

Edit

Write in Short

Short Answer▾

What is early blight of potato?

Question 307

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

Describe different processes involved m the molecular basis of fruit ripening.

Explanation

Processes Involved in the Molecular Basis of Fruit Ripening

  • Fruit ripening is a genetically programmed process lead by metabolic, enzymatic and physiological changes.
  • And hence different enzyme, nutrient, pigment and hormone mainly have role in ripening of fruit.
  • Some hydrolytic enzyme like polygalacturonase, cellulose, pectin methyl esterase increase

… (332 more words) …

Question 308

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

Enumerate the roles. Of Fe, Mg, Mn and K in plants.

Explanation

Various Elements in Plants

  • The elements must be absolutely necessary for supporting normal growth and development.
  • In absence of element the plant does not complete their life cycle or seed set.
  • Most of the minerals present in soil enter in plant through roots.
  • That minerals work as nutrition for plants. The required element must be specific.
  • The plant

… (516 more words) …

Question 309

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

How genetic code regulates gene expression? Describe the molecular method of gene mapping.

Explanation

Genetic Code and Gene Expression Regulation

  • Gene expression is the process in which the genetic code of gene direct the synthesis of protein.
  • Structural genes are the genes that code for amino acid.
  • The process of gene expression involves two main stages

Transcription

It is a process in which the information in a stand of DNA is copied into a new molecu

… (201 more words) …

Question 310

Edit

Appeared in Year: 2016

Write in Short

Short Answer▾

Discuss the roles of different hormones and enzymes involved in seed germination.

Question 311

Edit

Appeared in Year: 2016

Describe in Detail

Essay▾

Describe different methods of gene transfer in plants. Explain the advantages and disadvantages of transgenic plants.

Explanation

Gene Transfer in Plants

  • There is different method of gene transfer in plants-
    • Vector mediated transfer method
    • Agrobacterium
    • Virus mediated transfer method
      • Caulimoviruses
      • Gemini viruses
      • RNA viruses
  • Vectors that are used for transfer of the genes in the plants are RNA and DNA based.
  • In vectors based on T-DNA the vector DNA translocate into the nucleus and int

… (512 more words) …