Samacheer Kalvi Class 11 Bio Botany Mineral Nutrition Questions - 1

Question: 1

Nitrogen is the essential component of

(A) Protein

(B) Carbohydrate

(C) Fatty acids

(D) None of these

Question: 2

The process of converting atmospheric nitrogen (N₂) into ammonia is termed as

(A) Ammonification

(B) Nitrogen fixation

(C) Nitrification

(D) Nitrogen cycle

Question: 3

Deficiency symptoms of an element tend to appear first in young leaves due to its relative immobility. Which one of the following elemental deficiency would show such symptom

(A) Potassium

(B) Sulphur

(C) Magnesium

(D) Nitrogen

Question: 4

The one doesn't fix Nitrogen is

(A) Spirogyra

(B) Anbaena

(C) Azatobacter

(D) Nostoc

Question: 5

Leg haemoglobin is a

(A) Hormone fixing in Nitrogen

(B) Pigment present in flower petals

(C) Oxygen scavenger in BaA

(D) Pigment acting as oxygen scavenger in legumes

Question: 6

Toxicity of Mn in plant of may cause deficiency

(A) S, P and K

(B) Ca, CI and Mg

(C) N, P and Mn

(D) Fe and Mg

Question: 7

Law of minimum was proposed by

(A) Liebig

(B) Wamburg

(C) Van Helmont

(D) Julius von Sachs