Tag: botany

Questions Related to botany

Necrosis refers to 

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Inhibition of cell division

  2. Delay in flowering

  3. Death of tissues

  4. Falling of leaves

Show answer
Correct Option: C
Explanation:

When a living organism's cells or tissues die or degenerate, the condition is called necrosis. In a plant, necrosis causes leaves, stems and other parts to darken and wilt. Necrosis weakens the plant and makes it more susceptible to other diseases and pests. 

Thus, the correct answer is 'Death of tissues.'

Absence of light during plant growth, result in pale colour seeds known as:

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Photogenesis

  2. Phototonic effect

  3. Etiolation

  4. Photomophogenesis

Show answer
Correct Option: C
Explanation:

Seedlings grown in the dark develop long hypocotyl and their cotyledons remain closed around the epicotyl in an apical hook. This is referred to as skotomorphogenesis or etiolation. Etiolated seedlings are yellowish in color as chlorophyll synthesis and chloroplast development depend on light

So the correct answer is 'Etiolation'.

Which combination of statement is correct?
i. Biosynthesis of nucleorides,proteins and fatty acids takes place in the cytoplasm.
II. Nucleolus is present in the cytoplasm.
iii. Golgi apparatus helps in the forrmation of lysosomes.
iv. Flattened sacs of golgi apparatus is known as cisternae.
v. Ribsomes are not found in prokaryotic cells.

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. $i,iii \quad and \quad v$

  2. $ii,iii,iv \quad and \quad v$

  3. $i,iii \quad and \quad iv$

  4. $ii,iii \quad and \quad v$

  5. None of these

Show answer
Correct Option: C
Explanation:

The biosynthesis of nucleotides, proteins and fatty acids occur in the cytosol of the cell. 

The nucleolus is a dense spheroidal body situated within the nucleus. 
Golgi apparatus stores lysosome enzyme produced by the endoplasmic reticulum and further buds off as small vesicles to develop lysosomes. 

Golgi complex is a membrane-bound organelle that is present in eukaryotic cells that are composed of stacks of flattened and membrane-bound bodies, called cisternae. 
Ribosomes are found in both prokaryotic and eukaryotic cells. 
So, the correct answer is option C. 


Deficiency symptons of nitrogen and potassium are visible first in.

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Young leaves

  2. Roots

  3. Buds

  4. Senescent leaves

Show answer
Correct Option: D

Chlorosis is caused by the deficiency of.

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Chlorine and boron

  2. Nitrogen and calcium

  3. Magnesium and iron

  4. Potassium and phosphorus

Show answer
Correct Option: A

Apoptosis is programmed cell death characterised by the formation of apoptotic bodies whereas necrosis characterised by bursting of cells. Which of the following condition/s lead/s to necrosis ?
i) Gaps and nicks formed in DNA during replication cannot be repaired.
(ii) Developing neurons fail to make synapses with neighbouring cells.
(iii) Heart muscle cells damaged by oxygen depletion followed by cardiac infarction. 

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. (i) and (ii)

  2. (ii) and (iii)

  3. (i) only

  4. (iii) only

Show answer
Correct Option: A

Ribulose phosphate is a ____________.

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Aldose sugar

  2. Ketose sugar

  3. Disaccharide

  4. Trisaccharide

Show answer
Correct Option: A

Which component of the ETS is carrier of electron as well as proton?

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. UQ

  2. Cyt-a

  3. Cyt-b

  4. Cyt-f

Show answer
Correct Option: A

Which element is common to nucleic acids, phospholip ATP, ADP, NADPH, NAD, FAD?

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Calcium

  2. Boron

  3. Zinc

  4. Phosphorus

Show answer
Correct Option: A

Which one of the following statements can best explain the term critical concentration of an essential element? 

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Essential element concentration below which plant growth is retarded

  2. Essential element concentration below which plant growth becomes enhanced

  3. Essential element concentration below which plant remains in the vegetative phase

  4. None of the above

Show answer
Correct Option: A
Explanation:
Critical Concentration is the term which is used to define the concentration of essential elements below which the growth of plant is Retarded or Reduced. Also, if the concentration of essential elements rise above the critical concentrations.  it leads to Toxicity. So, the correct answer is "Essential elements concentration below which plant growth is retarded."