Description : Which element is located at the centre of the porphyrin ring in chlorophyll? (a) Calcium (b) Magnesium (c) Potassium (d) Manganese
Last Answer : (b) Magnesium
Description : The metallic constituents of hard water are - (1) Magnesium, Calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron
Last Answer : (3) Calcium, magnesium and iron Explanation: Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed whenwater percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates.
Description : The metallic Constituents of hard water are – (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron
Last Answer : (3) Calcium, magnesium and iron Explanation: Hard water is water that has high mineral content. In domestic settings, hard water is often indicated by a lack of suds formation when soap is ... water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.
Description : The metallic constituents of hard water are : (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron
Last Answer : Calcium, magnesium and iron
Description : Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium
Last Answer : (2) Magnesium Explanation: Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesize carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for ... It is found in the chloroplasts of green plants, and is what makes green plants, green.
Description : Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium
Last Answer : Magnesium
Description : Cytochrome is (a) metallo flavo protein (b) Fe containing porphyrin pigment (c) glycoprotein (d) lipid.
Last Answer : (b) Fe containing porphyrin pigment
Description : Which of the following metals is present in chlorophyll? (1) Beryllium (2) Magnesium (3) Calcium (4) Barium
Last Answer : (2) Magnesium Explanation: Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorin ring is a magnesium ion.
Description : Which of the following is not a component of chlorophyll? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium
Last Answer : (4) Calcium Explanation: Chlorophyll, a photo-receptive pigment, allows plants to absorb sunlight and synthesize it into carbohydrates and oxygen. The basic formula for photosynthesis takes 6 molecules ... to and produced through the same metabolic pathway as other porphyrin pigments such as home.
Description : Which of the following is not a component of chlorophyll ? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium
Last Answer : Calcium
Description : Which one of the following metals is essential to the structure and functioning of hemoglobin? w) copper x) magnesium y) tin z) iron
Last Answer : ANSWER: Z -- IRON
Description : Chlorophyll contains – (1) Iron (2) Magnesium (3) Cobalt (4) Zinc
Last Answer : (2) Magnesium Explanation: Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
Description : Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride
Last Answer : (c) Magnesium
Description : Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum ... yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid
Last Answer : (a) Application of iron and magnesium to promote synthesis of chlorophyll
Description : Chlorophyll contains (1) Iron (2) Magnesium (3) Cobalt (4) Zinc
Description : Rock salt is a mineral containing – (1) potassium (2) magnesium (3) sodium (4) iron
Last Answer : (3) sodium Explanation: Halite, commonly known as rock salt, is the mineral form of sodium chloride (NaCl). Halite forms isometric crystals. It commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides, and borates.
Description : Rock salt is a mineral containing (1) potassium (2) magnesium (3) sodium (4) iron
Last Answer : sodium
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 : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride
Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl
Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate
Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3
Last Answer : Calcium and Magnesium
Description : Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium
Last Answer : Aluminium and Magnesium
Description : Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium
Last Answer : Answer : C
Description : Milk is not considered a balanced diet now-a-days because of the absence of : (1) Magnesium and Vitamin D (2) Iron and Vitamin C (3) Calcium and Vitamin C (4) Iron and Vitamin A
Last Answer : (2) Iron and Vitamin C Explanation: A balanced diet means getting the right types and amounts of foods and drinks to supply nutrition and energy for maintaining body cells, tissues, and organs, and ... , and chlorine are all included as minerals and they typically occur at concentration of 5-40 mM.
Description : Pregnant women usually become deficient in - (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron
Last Answer : (3) Calcium and Iron Explanation: When a woman becomes pregnant her body undergoes many physiological changes. Her hormone levels change not only to support the pregnancy but also to help ... only 15 percent to 20 percent, the risk of developing iron-deficiency anemia increases during pregnancy.
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
Description : Mineral found in red pigment of vertebrate blood is (a) magnesium (b) iron (c) calcium (d) copper.
Last Answer : (b) iron
Description : Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron
Last Answer : b. Magnesium and Calcium
Description : furnace slag is mainly molten (A) Sand (B) Magnesium silicate (C) Calcium silicate (D) Iron pyrite
Last Answer : Option C
Description : Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above
Last Answer : Answer: Option D
Description : Pregnant women usually become deficient in (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron
Last Answer : Calcium and Iron
Last Answer : Iron and Vitamin C
Description : What is contained in Chlorophyll? (1) Sodium (2) Potassium (3) Manganese (4) Magnesium
Last Answer : (4) Magnesium Explanation: The basic structure of a chlorophyll molecule is a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, ... was discovered in 1906, and was the first time that magnesium had been detected in living tissue.
Description : Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes
Last Answer : (1) Chlorophyll molecule Explanation: The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in ... was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
Description : Magnesium is a constituent of : (A) Nucleic Acid (B) Enzyme system (C) Cell wall (D) Chlorophyll
Last Answer : (D) Chlorophyll
Description : Chlorophyll a molecule at its carbon atom 3 of the pyrrole ring II has one of the following (a) carboxylic group (b) magnesium (c) aldehyde group (d) methyl group
Last Answer : d) methyl group.
Description : A plant requires magnesium for (a) protein synthesis (b) chlorophyll synthesis (c) cell wall development (d) holding cells together.
Last Answer : (b) chlorophyll synthesis
Description : Magnesium is present in (A) Haemoglobin (B) Chlorophyll (C) Hypo solution (D) None of these
Last Answer : (B) Chlorophyll
Description : Magnesium is a constituent metal of (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes
Last Answer : Chlorophyll molecule
Description : What is contained in Chlorophyll ? (1) Sodium (2) Potassium (3) Manganese (4) Magnesium
Description : Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin
Last Answer : ANSWER: Y -- OXYGEN
Description : Which of the following coenzyme is required for porphyrin synthesis? (A) Coenzyme A (B) Pyridoxal phosphate (C) Both (A) and (B) (D) None of these
Description : An amino acid required for porphyrin synthesis is (A) Proline (B) Glycine (C) Serine (D) Histidine
Last Answer : Answer : A
Description : The porphyrin present in haem is (A) Uroporphyrin (B) Protoporphyrin I (C) Coproporphyrin (D) Protoporphyrin II
Last Answer : Answer : D
Description : The number of molecules of porphobilinogen required for the formation of a tetrapyrrole i.e., a porphyrin is (A) 1 (B) 2 (C) 3 (D) 4
Description : In mammalian liver the rate controlling enzyme in porphyrin biosynthesis is (A) ALA synthase (B) ALA hydratase (C) Uroporphyrinogen I synthase (D) Uroporphyrinogen III cosynthase
Description : Porphyrin synthesis is inhibited in (A) Mercury poisoning (B) Lead poisoning (C) Manganese poisoning (D) Barium poisoning
Last Answer : Answer : B
Description : Chlorophyll containing autotrophic thallophytes is called as – (1) Algae (2) Lichens (3) Fung (4) Bryophytes
Last Answer : (1) Algae Explanation: Algae are chlorophyll (green pigment) containing thallophytes. They prepare their own food and are thus autotrophic in their mode of nutrition.