Description : How may cells be disrupted in order to obtain subcellular organelles by centrifugal fractionation?
Last Answer : There are several ways of disrupting cells: 1. Osmotic lysis. The plasma membranes of cells are water-permeable but are impermeable to large molecules and some ions. Thus if cells are placed ... cause microcavitation in the sample, and this disrupts the cell membranes, usually in a few seconds.
Description : Under the electron microscope, you observe a cell with three different types of large organelles, each bounded by two membranes. The cell is most likely (a) A plant (b) An animal (c) A fungus (d) A bacterium
Last Answer : Ans:(a)
Description : The process by which the amount of DNA, RNA and protein can be known at a time is: (a) Cell fractionation (b) Autoradiography (c) Phase-contrast microscopy (d) Tissue culture
Last Answer : Ans. ((b))
Description : Are larger cells with membrane-bounded organelles?
Last Answer : booty hole
Description : Isolation of cellular components to determine their chemical composition is called (A) Cell differentiation (B) Chromatography (C) Cell fractionation (D) All of these
Last Answer : (C) Cell fractionation
Description : A stream tube is that, which has __________ cross-section entirely bounded by stream lines. (A) A circular (B) Any convenient (C) A small (D) A large
Last Answer : (B) Any convenient
Description : While creating the table Student last week, Ms. Sharma forgot to include the column -Technology
Last Answer : ALTER TABLE Student ADD Game_Played VARCHAR (30) ;
Description : Generative cell was destroyed by laser but a normal pollen tube was still formed because (a) vegetative cell is not damaged (b) contents of killed generative cell stimulate pollen growth (c) laser beam stimulates growth of pollen tube (d) the region of emergence of pollen tube is not harmed.
Last Answer : (a) vegetative cell is not damaged
Description : If a bar chart showed that 4 students received an A on the test 3 students received a B and 1 student received a C the shortest bar on the chart would be for the B column.?
Last Answer : No, the shortest bar would be C
Description : Identify the two components of Phloem tissue that help in transportation of food in plants (a) Phloem parenchyma & sieve tubes (b) Sieve tubes & companion cell. (c) Phloem parenchyma & companion cell. (d) Phloem fibres and sieve tubes
Last Answer : (b) Sieve tubes & companion cell.
Description : Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater. (A) Electric immersion (B) Pipestill (C) Steam coil (D) None of these
Last Answer : (B) Pipestill
Description : The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of (a) weak gravitational pull (b) transpiration pull (c) lignified thick walls (d) cohesion and adhesion
Last Answer : (d) cohesion and adhesion.
Description : Fertiliser plants get their N2 requirements (A) By fractionation of liquefied air (B) By dissociating oxides of nitrogen (C) From coal gas (coke oven gas) (D) From producer gas
Last Answer : (A) By fractionation of liquefied air
Description : Oxygen is produced by fractionation of air using __________ process. (A) Linde's (B) Claude's (C) Either (A) or (B) (D) None of these
Last Answer : (C) Either (A) or (B)
Description : From the following, which option shows an issue faced with multimedia contents ? a) Converting multimedia information coming from hardware devices into computer data b) converting the computer data back into audio/ ... for playing on the hardware device c) a and b both d) None of these
Last Answer : c) a and b both
Description : A student sets up an expirment on photoysthesis as folows : He takes soda water in a glass tumbler and adds chloroplyll into the contents and keeps th
Last Answer : A student sets up an expirment on photoysthesis as folows : He takes soda water in a ... because intact chloroplasts are needed for the process.
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following is not true for prokaryotic organism? A- Nucleus is not bounded by nuclear membrane B- Chromosomes does not contain histones C- 80S ribosomes are distributed in cytoplasm D- Cell wall contains peptidoglycan as one of the major component
Last Answer : 80S ribosomes are distributed in cytoplasm
Description : Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat ... drop through the exchanger is desired (D) Temperature of the incoming vapor is very high
Last Answer : (B) Supersaturated
Description : Pick out the wrong statement: (A) The capacity of an evaporator is reduced by the boiling point elevation (B) Corrosive liquid is normally passed through the tubes in a ... recompression evaporator (D) Heat sensitive materials should be concentrated in high pressure evaporators
Last Answer : (D) Heat sensitive materials should be concentrated in high pressure evaporators
Description : Monro-Kellie hypothesis refers to a) the dynamic equilibrium of cranial contents. The hypothesis states that because of the limited space for expansion within the skull, an increase in any ... the patient is wakeful but devoid of conscious content, without cognitive or affective mental function.
Last Answer : a) the dynamic equilibrium of cranial contents. The hypothesis states that because of the limited space for expansion within the skull, an increase in any one of the cranial contents (brain tissue, blood, or cerebrospinal fluid) causes a change in the volume of the others.
Description : Evisceration is: a. Excision of the entire eyeball b. Excision of all the inner contents of the eyeball including the uveal tissue c. Photocoagulation of the retina d. Removal of orbit contents
Last Answer : ANSWER: B
Description : For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of (a) copper (b) aluminium (c) steel (d) brass
Last Answer : Ans: c
Description : In test-tube babies, the - (1) Ovum is fertilized and developed in testtubes (2) Ovum is fertilized in the test-tubes and developed in uterus (3) Ovum is fertilized in the uterus and developed in test-tubes (4) Ovum is developed without fertilization in test-tubes
Last Answer : (2) Ovum is fertilized in the test-tubes and developed in uterus Explanation: In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process ... zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.
Last Answer : Answer: B
Description : Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone. (A) Laminar (B) Transition (C) Both 'a' & 'b' (D) Highly turbulent
Last Answer : (D) Highly turbulent
Description : The main function of baffles provided in a shell and tube heat exchanger is to (A) Facilitate the cleaning of outer tube surface (B) Enhance turbulence (C) Hold the tubes in position (D) All 'a', 'b' & 'c'
Last Answer : (B) Enhance turbulence
Description : Vibrations in the tubes of a shell and tube heat exchanger is induced due to the (A) Flow of fluid on the tube and shell sides (B) Oscillations in the flow of shell/tube sides fluid (C) Vibrations ... piping and/or supports due to external reasons (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : In an extended surface heat exchanger, fluid having lower co-efficient (A) Flows through the tube (B) Flows outside the tubes (C) Can flow either inside or outside the tubes (D) Should not be used as it gives very high pressure drop
Last Answer : (B) Flows outside the tubes
Description : Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both ... steam on shell side (D) Shell and tube heat exchanger with air on shell side and steam inside tubes
Last Answer : (B) Finned tube heat exchanger with air outside and steam inside
Description : In a gas-liquid shell and tube heat exchanger, the (A) Presence of a non-condensable gas decreases the condensing film coefficient (B) Gases under high pressure are routed through the tube side, because high pressure ... water or steam condensate remain localised to the tubes (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : Tubes are held between top and bottom tube sheets in Calandria type evaporator by keeping (A) Both the tube sheets fixed (B) Both the tube sheets floating (C) The top tube sheet floating and bottom tube sheet fixed (D) The top tube sheet fixed and the bottom tube-sheet floating
Last Answer : (A) Both the tube sheets fixed
Description : In a shell and tube heat exchanger, floating head is used for (A) Large temperature differentials (B) High heat transfer co-efficient (C) Low pressure drop (D) Less corrosion of tubes
Last Answer : (A) Large temperature differentials
Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu
Last Answer : B) Au
Description : You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes ... bicarbonate (b) Chilled test tube (c) Test tube containing heparin (d) Test tube containing sodium oxalate
Last Answer : (a) Test tube containing calcium bicarbonate
Description : The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in (a) bronchioles and Fallopian tubes (b) bile duct and bronchioles (c) Fallopian tubes and pancreatic duct (d) Eustachian tube and salivary duct
Last Answer : (a) bronchioles and Fallopian tubes
Description : If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is (A) Same in both the tubes (B) Greater in 1 mm dia tube (C) Greater in 0.5 mm dia tube (D) Zero in both the tubes
Last Answer : (C) Greater in 0.5 mm dia tube
Description : Baffles provided on the shell side of a shell and tube heat exchanger are meant for (A) Providing support for the tubes (B) Improving heat transfer (C) Both 'a' & 'b' (D) Preventing the fouling of tubes & stagnation of shell side fluid
Last Answer : C) Both 'a' & 'b'
Description : Water-tube boiler is the one, in which (A) Water passes through tubes and flue gases around it (B) Tube carrying hot flue gases are immersed in a pool of water (C) Tubes are placed in vertical position (D) None of these
Last Answer : Option A
Description : When providing care to the patient with bilateral nephrostomy tubes, the nurse never does which of the following? a) Clamps each nephrostomy tube when the patient is moved The nurse must never clamp a ... saline q8h as ordered The nurse may irrigate a nephrostomy tube with specific orders to do so.
Last Answer : a) Clamps each nephrostomy tube when the patient is moved The nurse must never clamp a nephrostomy tube because it could cause obstruction and resultant pyelonephritis.
Description : Mercury is typically used in the placement of which of the following tubes? a) Miller-Abbott Most nasoenteric tubes use mercury to carry the tube by gravity to its desired location. b) ... Dobbhoff tubes are used for enteric feeding. d) EnterafloW Enteraflow tubes are used for enteric feeding
Last Answer : a) Miller-Abbott Most nasoenteric tubes use mercury to carry the tube by gravity to its desired location.
Description : Medium -length nasoenteric tubes are used for: a) Feeding Placement of the tube must be verified prior to any feeding. b) Decompression A gastric sump and nasoenteric tube are used for ... aspiration. d) Emptying Gastric sump tubes are used to decompress the stomach and keep it empty.
Last Answer : a) Feeding Placement of the tube must be verified prior to any feeding.
Description : Fire tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy
Last Answer : a) Flue gases pass through tubes and water around it
Description : Water tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy
Last Answer : b) Water passes through the tubes and flue gases around it
Description : When designing vacuum-tube circuits, what characteristics of tubes must be taken into consideration?
Last Answer : Differences in performance of tubes of the same type
Description : Is there a quick rule-of-thumb to estimate a gas side heat-transfer rate inside the tubes of a shell and tube heat exchanger?
Last Answer : If you need to estimate a gas heat transfer rate or see if a program is getting a reasonable gas rate, use the following: h = 75 X Sq. Root(Op. pressure/100) The operating pressure is ... will be lower for the shell side or if there is more than one exchanger. Source: Gulley Computer Associates
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : In surface condensers write role of (i) Water tubes (ii) Shell (iii) Baffle plate (iv) Tube sheet
Last Answer : Function of parts in surface condensers 1. Water tubes- Cooling water flows through it , for convective heat transfer to occur with steam outside the tubes 2. Shell- Outer body, all components are ... and improves heat transfer 4. Tube sheet- All tubes are supported at the end in tube sheet
Description : In test-tube babies, the (1) Ovum is fertilized and developed in test-tubes (2) Ovum is fertilized in the testtubes and developed in uterus (3) Ovum is fertilized in the uterus and developed in testtubes (4) Ovum is developed without fertilization in test-tubes
Last Answer : Ovum is fertilized in the testtubes and developed in uterus