CBSE Class 11 Biology Mineral Nutrition Worksheet Set A

Question. Which one of the following elements is not an essential micronutrient for plant growth?
(a) Ca
(b) Mn
(c) Zn
(d) Cu
Answer. A

Question. Leghaemoglobin helps in 
(a) nitrogen fixation
(b) protecting nitrogenase from O₂
(c) destroys bacteria
(d) transport of food in plants
Answer. B

Question. Which element plays an important role in nitrogen fixation?
(a) Mn
(b) Mo
(c) Zn
(d) Cu
Answer. B

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Plants lack excretory organs.
Reason : Plant usually absorb essential nutrients and lead a passive life.
Answer. B

Question. Assertion : Plants absorb sulphur in the form of sulphate ions.
Reason : Sulphur bacteria are required for the formation of sulphate. 
Answer. A

Direction: Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : Deficiency of sulphur causes chlorosis in plants.
Reason : Sulphur is a constituent of chlorophyll, protein and nucleic acids.
Answer. C