Description : An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is (a) cuticle (b) sporopollenin (c) lignin (d) cellulose.
Last Answer : (b) sporopollenin
Description : An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme isa) Sporopolleninb) Ligninc) Cellulosed) Cuticle
Last Answer : a) Sporopollenin
Description : Which of the following statements is correct? (a) Sporopollenin can be degraded by enzymes. (b) Sporopollenin is made up of inorganic materials. (c) Sporopollenin can withstand high temperatures ... strong acids and alkalis. (d) Sporopollenin can withstand high temperatures but not strong acids.
Last Answer : (c) Sporopollenin can withstand high temperatures as well as strong acids and alkalis
Description : During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded? (a) Lipids (b) Lignin (c) Hemi-cellulose (d) Cellulose
Last Answer : (b) Lignin
Description : Thickness and toughness of plant walls are increased by deposition within the original cellulose wall, of a substance known as lignin. The process of deposition is called: a) Sclerenchymacia b) Lignification c) Scleridia
Last Answer : ANSWER: B -- LIGNIFICATION
Description : In angiosperm, all the four microspores of tetrad are covered by a layer which is formed by (a) pectocellulose (b) callose (c) cellulose (d) sporopollenin
Last Answer : (a) pectocellulose
Description : Exine layer of pollen grain is made up of : a) sporopollenin b)Pectin c) cellulose d)chitin
Last Answer : Ans: a)sporopollenin
Description : Which of the following is not present in bagasse fibre? (A) Cellulose (B) Lignin (C) Pentogens (D) None of these
Last Answer : (D) None of these
Description : The synthetic fibres produced from __________ are known as rayon. (A) Lignin (B) Cellulose (C) Polyamides (D) Ethylene glyco
Last Answer : (B) Cellulose
Description : Main constituent of cotton fibre is (A) Lignin (B) Cellulose (C) Starch (D) Gelatine
Description : The ideal pulp for the manufacture of paper should have high __________ content. (A) Cellulose (B) Lignin (C) Both (A) & (B) (D) None of these
Last Answer : (A) Cellulose
Description : Pick out the wrong statement. (A) Fibrillation of fibre during paper manufacture is done to develop the strength in paper (B) Alkali consumption in digestion/cooking of bamboo is measured in terms ... both lignin & cellulose (D) Presence of sodium sulphate in pulp makes the pulp bleachability poor
Last Answer : (D) Presence of sodium sulphate in pulp makes the pulp bleachability poor
Description : The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to (A) Avoid mechanical weakening of fibre (B) Remove lignin by way of crystallisation (C) Increase the cellulose content (D) None of these
Last Answer : (A) Avoid mechanical weakening of fibre
Description : Main constituents of cotton fiber is (A) Lignin (B) Cellulose (C) Starch (D) Gelatine
Description : Conifers are adapted to tolerate extreme environmental conditions because of (a) broad hardy leaves (b) superficial stomata (c) thick cuticle (d) presence of vessels.
Last Answer : (c) thick cuticle
Description : The best understood intracellular messenger is cyclic AMP (cAMP). Which of the following statement(s) concerning this intracellular messenger is/are correct? a. Intracellular cyclic AMP is constantly ... of adenylate cyclase d. cAMP is the only cyclic nucleotide active as an intracellular messenger
Last Answer : Answer: a, b The prototypic intracellular messenger is cAMP. To function as a mediator, the concentration of cAMP must change rapidly. In resting cells, cAMP is continuously being degraded by ... produce cGMP. Intracellular calcium ions also serve as second messengers in a large number of cells
Description : Which one of the following is resistant to enzyme action? (a) Pollen exine (b) Leaf cuticle (c) Cork (d) Wood fibre
Last Answer : (a) Pollen exine
Description : An organic substance bound to an enzyme and essential for the activity of enzyme is called (A) Holoenzyme (B) Apoenzyme (C) Coenzyme (D) Isoenzyme
Last Answer : Answer : C
Description : Which of the following yields a substance other than glucose on degradation by water? w) Cellulose x) Glycogen y) Sucrose z) Maltose
Last Answer : ANSWER: Y -- SUCROSE
Description : Which one of the following statements is not true? (a) Pollen grains of many species cause severe allergies. (b) Stored pollen in liquid nitrogen can be used in the crop breeding programmes. (c) Tapetum helps in the dehiscence of anther. (d) Exine of pollen grains is made up of sporopollenin.
Last Answer : (c) Tapetum helps in the dehiscence of anther.
Description : Which of the following has proved helpful in preserving pollen as fossils? (a) Pollenkitt (b) Cellulosic intine (c) Oil content (d) Sporopollenin
Last Answer : (d) Sporopollenin
Description : Which of the following has proved helpful in preserving pollen as fossils ? (1) Pollenkitt (2) Cellulosic intine (3) Oil content (4) Sporopollenin
Last Answer : (4) Sporopollenin
Description : Which of the following precautions should be taken when troubleshooting various power circuits using a common solenoid-type mechanical voltage tester (wiggins)? A. Never use this tester on circuits greater ... voltage expected in the circuit in order to prevent damage from an off-scale reading.
Last Answer : Answer: A
Description : A belief that is worth maintaining is a belief that a. can withstand critical scrutiny. b. doesn't need critical scrutiny. c. should not be challenged. d. cannot be doubted.
Last Answer : a. can withstand critical scrutiny.
Description : Which of the following terms best fits the statement: "Process by which polysaccharides are degraded to monosaccharides." w) hydrolysis x) glycolosis y) lipogenesis z) none of the above
Last Answer : ANSWER: W -- HYDROLYSIS
Description : Most abundant organic compound on earth is (a) protein (b) cellulose (c) lipids (d) steroids.
Last Answer : cellulose
Description : Most of Nitrogen is used in the decomposition of __________ and thus plant shows deficiency symptoms : a. Amino acids b. Cellulose c. Carbon compounds d. Organic matter
Last Answer : Cellulose
Description : The most abundant organic molecule on the surface of the Earth is: w) cellulose x) chitin y) DNA z) hemoglobin
Last Answer : ANSWER: W -- CELLULOSE
Description : Pick up the correct statement from the following: (A) Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite ... prepared a substance from urea and formaldehyde and called it Plastic (D) All the above
Last Answer : Answer: Option D
Description : How can lignin be deposited in the inner walls of xylem vessel?
Last Answer : Need answer
Description : Compound having phenylpropanoid origin is called (a) an alkaloid (b) a terpene (c) a lignin (d) a flavonoid
Last Answer : Ans:(c)
Description : A healthy person eats the following diet-5 gm raw sugar, 4 gm albumin, 10 gm pure buffalo ghee adultrated with 2 gm vegetable ghee (hydrogenated vegetable oil) and 5 gm lignin. How many calories he is likely to get? (a) 126 (b) 164 (c) 112 (d) 144
Last Answer : (d) 144
Description : Which of the following is a constituent of coffee? (A) Caffeine (B) Nicotine (C) Calgon (D) Lignin
Last Answer : (A) Caffeine
Description : Digestion of wood-base materials (for manufacture of pulp) is done to (A) Remove lignin (B) Produce long fibres (C) Prevent deterioration on storage (D) None of these
Last Answer : (A) Remove lignin
Description : An adsorbant a). Activated carbon b). lignin byproducts c). ion exchange resins d). All
Last Answer : d). All
Description : 34. Decomposition rate is slower if detritus is ... b) Rich in Nitrogen b) Rich in lignin and chitin c) Rich in sugars d) Rich in fats and lipids
Last Answer : b) Rich in lignin and chitin
Description : 14. Decomposition rate is slower if detritus is ... a) Rich in Nitrogen b) Rich in lignin and chitin c) Rich in sugars d) Rich in fats and lipids
Description : How good are you at dealing with your extremes of weather?
Last Answer : I avoid outdoors during summer – which is approximately March through November.
Description : Do you guys have temperature extremes like this (see details) where you live?
Last Answer : answer:Same here. Went from 73 degrees a week ago Sunday to snow and 25 degrees mid-week. I'm in the Sierra Nevada foothills of Ca. About one hour from Lake Tahoe. I think California is in ... 80 something degrees compared to Truckee Ca. which is one of the coldest places on earth in the winter.
Description : Why do I leave procrastinate and avoid things to such extremes for no reason?
Last Answer : taosan: What? To answer the Q, I am just like that! I don’t know how to fix it, though. I hope someone can help us…
Last Answer : M. And Akhtar Buds 3
Description : What selection favors two extremes in a range of phenotypes?
Description : What Buddhism maintaining a balance between the extremes of?
Last Answer : The Middle Way is a principle of all Buddhist sects.
Description : Extremes?
Last Answer : DefinitionExtremity angiography, or peripheral angiography is a test used to see the arteries in the hands, arms, feet, or legs.Angiography is an imaging test that uses x-rays and a special dye to see ... injected into the skin over an artery, and a needle is inserted into that artery.A thin pl
Description : If the usual rule of calculation of time were applied for the extremes of Gujrat and Arunachal Pradesh, then approximately time: [CPO AC 2003] (a) at Gujarat would be ahead of that at Arunachal Pradesh by ... about 3 hours (d) at Arunachal Pradesh would be ahead of that at Gujarat by about 2 hours
Last Answer : Ans: (d)
Description : Contact dermatitis, which of the following are common irritants? A. Water (Missed. B. temperature extremes (Missed. C. Frictional abrasives (Missed. D. Nickel Ans: D 123. Atopic eczema induces lichenification A. True B. False
Last Answer : Ans: A
Description : Water availability, temperature extremes, and __________ should be considered when selecting trees for the landscape. a. Slope b. Topography c. Soil type d. Buildings present
Last Answer : Soil typ
Description : Select the correct statement. (a) Sequoia is one of the tallest trees. (b) The leaves of gymnosperms are not well adapted to extremes of climate. (c) Gymnosperms are both homosporous and heterosporous. (d) Salvinia, Ginkgo and Pinus all are gymnosperms.
Last Answer : (a) Sequoia is one of the tallest trees.
Description : What prevents extremes of pH in biological systems? a. acid b. bases c. buffers d. neutrons
Last Answer : c. buffers