Check your Progress and get points for your performance
Login & Start the Test
OR
Start the Test Without Login
OR
Scroll Down to See Questions
Click on Any Option to check right Answer and Explanation.
1 of 25
Q.1 In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the
- bending of leaf tip
- formation of anthocyanins
- poor development of vasculature
- appearance of dead necrotic tissue
2 of 25
Q.2 Function of zinc is
- Closing of stomata
- Biosynthesis of 3-IAA
- Synthesis of chlorophyll
- Oxidation of carbohydrate
3 of 25
Q.3 Which of the following is a group of micronutrients?
- Ca, Zn, B
- Fe, Mn, Cu
- Cl, C, Ca
- Ni, Mo, H
4 of 25
Q.4 The process of conversion of NO2– to N2 is called
- nitrification
- ammonification
- denitrification
- nitrogen fixation
5 of 25
Q.5 The formation of first stable product of nitrogen fixation is catalysed by enzyme
- dehydrogenase
- nitrogenase
- isomerase
- none of these
6 of 25
Q.6 Manganese toxicity leads to deficiency of
- iron
- calcium
- magnesium
- all of the above
7 of 25
Q.7 Chlorosis will occur if a plant is grown in
- dark
- shade
- strong light
- Fe – free medium
8 of 25
Q.8 Choose the correct function of magnesium
- It is a constituent of several coenzyme
- It activates the enzymes of respiration and photosynthesis.
- It activates enzyme catalase
- It helps in maintaining anion-cation balance
9 of 25
Q.9 Mineral salts which are absorbed by the roots from soil are in the form of
- Dilute solution
- Very concentrated solution
- Concentrated solution
- Very dilute solution
10 of 25
Q.10 Which one of the following mineral elements plays an in biological nitrogen fixation?
- Copper
- Manganese
- Zinc
- Molybdenum
11 of 25
Q.11 Oxygen scavangers present in root nodules of legumes is
- haemoglobin
- leg haemoglobin
- cyano haemoglobin
- none of these
12 of 25
Q.12 Which one of the following is not a micronutrient?
- Magnesium
- Molybdenum
- Boron
- Zinc
13 of 25
Q.13 Which of the following is not a macronutrient
- iron
- calcium
- manganese
- phosphorus
14 of 25
Q.14 Insectivorous plants grow where
- There is carbohydrate deficient soil
- There is nitrogen deficient soil
- Vitamin c is required
- Hormones are required
15 of 25
Q.15 Phytotron is meant for
- Controlled humidity
- Induction of mutations
- Controlled irradiation
- Growing plants under controlled environment
16 of 25
Q.16 Toxicity of which element leads to the appearance of brown spots on leaves
- Mg
- Mn
- Fe
- Cu
17 of 25
Q.17 Presence of phosphorus
- brings about healthy root growth
- promotes fruit ripening
- retards protein formation
- none
18 of 25
Q.18 Which element is required for opening and closing of stomata?
- P
- K
- Ca
- Na
19 of 25
Q.19 Exanthema is due to deficiency of
- B
- Mo
- Mn
- Cu
20 of 25
Q.20 NPK denotes
- Nitrogen, Protein, Kinetin
- Nitrogen, Protein, Potassium
- Nitrogen, Potassium, kinetin
- Nitrogen, Phosphorus, Potassium
21 of 25
Q.21 The nitrogen exists as two nitrogen atoms joined by
- Di covalent bonds
- tetra covalent bonds
- triple covalent bonds
- monocovalent bond
22 of 25
Q.22 Biological nitrogen fixation was discovered by
- Gericke
- Nehar and Sakmann
- Liebig
- Winograndsky
23 of 25
Q.23 The enzyme involved in biological nitrogen fixation are
- Carboxylase
- Oxygenase
- Dehydrogenase
- Nitrogenase
24 of 25
Q.24 The requirement of micro nutrient are always low if the concentration increases it leads to
- deficiency symptoms
- Cell differentiation
- toxicity
- Cell elongation
25 of 25
Q.25 Analysis of xylem sap shows
- presence of enzymes
- presence of organic matter
- presence of nutrients
- presence of mineral salts