Description : Which one of the following mineral elements play an important role in biological nitrogen fixation a. Copper b. Magnesium c. Zinc d. Molybdenum
Last Answer : Ans: D
Description : An element playing important role in nitrogen fixation is (a) molybdenum (b) copper (c) manganese (d) zinc
Last Answer : (a) Molybdenum
Description : In which of the following all three are macronutrients? (a) Molybdenum, magnesium, manganese (b) Nitrogen, nickel, phosphorus (c) Boron, zinc, manganese (d) Iron, copper, molybdenum
Last Answer : (d) Iron, copper, molybdenum
Description : Which among the following elements increases the absorption of water and calcium in plants? (1) Manganese (2) Boron (3) Copper (4) Molybdenum
Last Answer : (2) Boron Explanation: Boron increases the absorption of water and calcium in the plants. It helps in the metabolic activities in plants. Boron is necessary in order for sugar to move through protoplasmic membranes.
Description : Which among the following elements increases the absorption of water and calcium in plants ? (1) Manganese (2) Boron (3) Copper (4) Molybdenum
Last Answer : Boron
Description : Acrodermatitis enteropathica is due to defective absorption of (A) Manganese (B) Molybdenum (C) Iodine (D) Zinc
Last Answer : Answer : D
Description : The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction? (a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium
Last Answer : (c) Manganese and Chlorine
Description : Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are: (A) Nickel, cobalt & chromium (B) Tungsten, chromium & cobalt (C) Manganese, chromium & cobalt (D) Tungsten, molybdenum & nickel
Last Answer : Option B
Description : Best defined function of manganese in green plants is (a) photolysis of water (b) Calvin cycle (c) nitrogen fixation (d) water absorption.
Last Answer : (a) photolysis of water
Description : Best defined function of Manganese in green plants is (1) Water absorption (2) Photolysis of water (3) Calving cycle (4) Nitrogen fixation
Last Answer : (2) Photolysis of water
Description : What are some examples of biological activities in which osmosis plays important role ?
Last Answer : Hemolysis (destruction of red blood cells) by entrance of water, the hydric regulation in plants and the entrance of water in the xylem of vascular plants are all examples of biological phenomena caused by ... of water in plant roots since root cells are hypertonic in comparison to the soil.
Description : Monel metal is an alloy of (A) Molybdenum and nickel (B) Nickel and copper (C) Molybdenum and aluminium (D) Molybdenum and zinc
Last Answer : (B) Nickel and copper
Description : Nickel base alloys with __________ are known as monel metal. (A) Zinc (B) Tin (C) Copper (D) Molybdenum
Last Answer : (C) Copper
Description : Whip tail disease of cauliflower is caused by deficiency of— (A) Nitrogen (B) Boron (C) Molybdenum (D) Zinc
Last Answer : (C) Molybdenum
Description : What is biological Nitrogen fixation? -Biology
Last Answer : answer:
Description : End product of biological nitrogen fixation? -Biology
Description : What is non-biological nitrogen fixation? -Biology
Description : What is symbiotic biological nitrogen fixation? -Biology
Description : How may ATP are required for formation ofone `NH_(3)` in biological nitrogen fixation.
Last Answer : How may ATP are required for formation ofone `NH_(3)` in biological nitrogen fixation.
Description : The enzyme involved in biological nitrogen fixation
Last Answer : Ans. Nitrogenase
Description : During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by (a) carotene (b) cytochrome (c) leghaemoglobin (d) xanthophyll
Last Answer : (c) leghaemoglobin
Description : “Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium
Last Answer : b. B Nitrogen
Description : The process in which nitrogen is released into the atmosphere is (1) Ammonification (2) Denitrification (3) Biological nitrogen Fixation (4) Nitirification
Last Answer : Biological nitrogen Fixation
Description : Khetri project in Rajasthan has been set up for producing (a) Zinc (b) Manganese (c) Copper (d) Salt
Last Answer : Ans: (c)
Description : Hypochromic microcytic anaemia can occur in (A) Zinc (B) Copper (C) Manganese (D) None of these
Last Answer : Answer : B
Description : Hypogonadism can occur in deficiency of (A) Copper (B) Chromium (C) Zinc (D) Manganese
Last Answer : Answer : C
Description : Metalloenzyme-retinene for polymerization of insulin is (A) Copper (B) Zinc (C) Cobalt (D) Manganese
Description : Mitochondrial superoxide dismutase contains (A) Zinc (B) Copper (C) Magnesium (D) Manganese
Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc
Last Answer : (1) Calcium and Magnesium Explanation: Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
Description : Gun metal is an alloy of (A) Nickel, tin and copper (B) Copper, tin and zinc (C) Copper, phosphorus and nickel (D) Manganese, phosphorus and nickel
Last Answer : (B) Copper, tin and zinc
Description : Which micro-nutrient is most deficient in Indo-Gangatic alluvium soils? (a) Iron (b) Zinc (c) Copper (d) Manganese
Last Answer : (d) Manganese
Description : Which one of the following is essential for photolysis of water? (a) Manganese (b) Zinc (c) Copper (d) Boron
Last Answer : (a) Manganese
Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.
Last Answer : (c) phosphorus, potassium, sulphur, calcium
Last Answer : Calcium and Magnesium
Description : Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis
Last Answer : (c) (iii) (iv) (ii) (i)
Description : Cinnabar is an ore/mineral of – (1) Lead (2) Manganese (3) Molybdenum (4) Mercury
Last Answer : (4) Mercury Explanation: Cinnabarrefers to the common bright scarlet to brick red form of mercuryasullide (HgS) that is the most common source ore for refining elemental mercury. It is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.
Description : Which of the following is not a principal alloying element for the structural steel? (A) Molybdenum (B) Nickel (C) Manganese (D) Chromium
Last Answer : (A) Molybdenum
Description : Cinnabar is an ore/mineral of (1) Lead (2) Manganese (3) Molybdenum (4) Mercury
Last Answer : Mercury
Description : Explain the effects of following chemical elements on iron. i) Copper ii) Phosphorus iii) Manganese
Last Answer : Effect on iron: i) Copper: it improves the resistance to atmospheric corrosion. It strengthens steel. It may be added to improve formability. It improves pains adhesion ii) ... Manganese:it increase tensile strength, abrasion resistance, hardenability and toughness . it decrease weldability.
Description : Sugar-beet is an indicator plant for (A) Sodium (B) Molybdenum (C) Zinc (D) Phosphorus
Last Answer : (A) Sodium
Description : Strain used for biological N2 fixation in groundnut is
Last Answer : Ans.Rhizobium japonicum
Description : Which element is involved in biosynthesis of IAA ? (A) Nitrogen (B) Boron (C) Zinc (D) Copper
Last Answer : (C) Zinc
Description : The Vindhyan system of rocks is important for the production of [CDS 2011] (a) precious stones and building materials (b) iron ore and manganese (c) bauxite and mica (d) copper and uranium
Last Answer : Ans: (a)
Description : Since fuse elements are made of zinc or any alloy of tin and lead, the melting point of the fuse element must be _____________. A. higher than that of copper B. lower than that of copper C. equal to that of copper D. reached when the conductor it is protecting becomes 'white hot.'
Last Answer : Answer: B
Description : Wilson’s disease is a condition of toxicosis of (A) Iron (B) Copper (C) Chromium (D) Molybdenum
Description : In hemochromatosis, the liver is infiltrated with (A) Iron (B) Copper (C) Molybdenum (D) Fats
Last Answer : Answer : A
Description : Haemoglobin contains the metal - (1) Copper (2) Molybdenum (3) Iron (4) Magnesium
Last Answer : (3) Iron Explanation: Haemoglobin is an ironcontaining protein in red blood cells. It contains a haem prosthetic group that has an iron atom at its centre. When the iron is bound to oxygen, the haem ... is red in colour (oxyhameoglobin), and when it lacks oxygen (deoxygenated form) it is blue-red.
Description : The 'bomb' in the bomb calorimeter is made of (A) Molybdenum stainless steel (B) Mild steel (C) High silicon iron (14% Si) (D) Copper
Last Answer : (A) Molybdenum stainless steel
Description : Hastelloy comprises of (A) Copper and tin (B) Copper and nickel (C) Molybdenum and nickel (D) Lead and tin
Last Answer : (C) Molybdenum and nickel