Tag: deficiency symptoms

Questions Related to deficiency symptoms

Chlorosis, i.e., loss of chlorophyll leading to yellowing in leaves, is caused by the deficiency of 

  1. N, K, Mg

  2. S, Fe, Zn

  3. Mn, Mo, Mg

  4. All of these


Correct Option: D

While in N, K and Mg deficiency, chlorosis appears first in _____ leaves; in S and Ca deficiency,_____ leaves are the first to be affected.

  1. Young, old

  2. Old, young

  3. Old, old

  4. Young, young


Correct Option: B

Deficiency symptoms of radially mobilised essential elements will first appear in _________

  1. Younger tissues

  2. Older tissues

  3. Roots

  4. Shoots


Correct Option: B

Yellowish edges appear in leaves deficient in

  1. Potassium

  2. Calcium

  3. Magnesium

  4. Phosphorus


Correct Option: A

Necrosis mainly occurs by the deficiency of  

  1. Ca, Mg

  2. N, S

  3. Mn, Mo

  4. Fe, Mn


Correct Option: A

Premature leaf fall is due to deficiency of 

  1. Sodium

  2. Potassium

  3. Zinc

  4. Phosphorus


Correct Option: D

Necrosis refers to 

  1. Inhibition of cell division

  2. Delay in flowering

  3. Death of tissues

  4. Falling of leaves


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:

  1. Photogenesis

  2. Phototonic effect

  3. Etiolation

  4. Photomophogenesis


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.

  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


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.

  1. Young leaves

  2. Roots

  3. Buds

  4. Senescent leaves


Correct Option: D