Description : Keeping in view the fluid mosaic model' for the structure of cell membrane, which one of the following statement is correct with respect to the movements of lipids and proteins from one lipid ... ) Both lipids and proteins can flip-flop (d) While lipids can rarely flip-flop, proteins cannot.
Last Answer : (d) While lipids can rarely flip-flop, proteins cannot.
Description : According to widely accepted fluid mosaic model cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several ... domains of the membrane. (d) Many proteins remain completely embedded within the lipid bilayer.
Last Answer : (b) Proteins can also undergo flip-flop movements in the lipid bilayer.
Description : Select the correct statement from the following regarding cell membrane. (a) Na+ and K+ ions move across cell membrane by passive transport. (b) Proteins make up 60 to 70% of the cell ... towards the inner part. (d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
Last Answer : (d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.
Description : Select the correct statement from the following regarding cell membrane (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson (2) Na+ and K+ ions move across cell membrane by ... of the cell membrane (4) Lipids are arranged in a bilayer with polar heads towards the inner part
Last Answer : (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
Description : What is the function of the fluid mosaic model of a cell membrane? -Biology
Last Answer : answer:
Description : Fluid mosaic model of cell membrane was put forward by (a) Danielli and Davson (b) Singer and Nicolson (c) Garner and Allard (d) Watson and Crick.
Last Answer : (b) Singer and Nicolson
Description : Explain the structure of plasma membrane on the basis of Fluid mosaic model.
Last Answer : Explain the structure of plasma membrane on the basis of Fluid mosaic model.
Description : Which of the following features is predicted by the Nicolson–Singer fluid mosaic model of biological membranes? (A) Membrane lipids do not diffuse laterally (B) Membrane lipid is primarily in a monolayer form (C) Membrane lipids freely flip-flop (D) Membrane proteins may diffuse laterally
Last Answer : Answer : D
Description : According to fluid mosaic model, plasma membrane is composed of (a) phospholipids and oligosaccharides (b) phospholipids and hemicellulose (c) phospholipids and integral proteins (d) phospholipids, extrinsic proteins and intrinsic proteins.
Last Answer : (d) phospholipids, extrinsic proteins and intrinsic proteins.
Description : The latest model for plasma membrane is (a) lamellar model (b) unit membrane model (c) fluid mosaic model (d) molecular lipid model.
Last Answer : (c) fluid mosaic model
Description : In fluid mosaic model of plasma membrane (a) upper layer is non-polar and hydrophilic (b) upper layer is polar and hydrophobic (c) phospholipids form a bimolecular layer in middle part (d) proteins form a middle layer.
Last Answer : (c) phospholipids form a bimolecular layer in middle part
Description : ″Proteins icebergs in a sea of lipids” is stated by (A) Lamellar Model (B) Unit-membrane Model (C) Fluid-Mosaic model (D) Micellar Model
Last Answer : (C) Fluid-Mosaic model
Description : Describe Plasma membrane with reference to Fluid Mosaic model.
Last Answer : Ans: Fluid Mosaic model was proposed by Singer and Nicholson. This model states that plasma membrane is semi-solid. It has bimolecular fluid like lipid zone in which the solid like proteins are ... ). This model best explains the functions of plasma membrane. Hence it is most acceptable model.
Description : Which of the following cell part is described as a "fluid mosaic"? (A) Chloroplast (B) Vacuole (C) Cell membrane (D) Endoplasmic reticulum
Last Answer : (C) Cell membrane
Description : Name the scientist who proposed fluid mosaic model. -Biology
Description : What is fluid mosaic model? -Biology
Description : What is The fluid mosaic model describes the .?
Last Answer : The cell membrane.
Description : Q. What are the characteristics of fluid mosaic model?
Last Answer : A. Membrane is composed of lipid bilayer. Phospholipids are arranged in bilayers with a hydrophobic core
Description : What is Fluid Mosaic Model?
Last Answer : According to the this model the cell membrane consists of lilpid bilayer in which most protein molecules float about while some stay embedded in the membrane.
Description : The superior colliculi: a. receives P fibres from the retina b. receives M fibres from the retina c. regulates saccade movement d. is the centre for pursuit movemen
Last Answer : receives M fibres from the retina
Description : Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the ... 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only
Last Answer : (b) 1 & 3 only
Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.
Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.
Description : Which of the statements give below is correct with respect to frameshift mutation a) a single nucleotide base change, insertion, or deletion of the genetic material b) Glutamine is replaced by valine c) ... or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Last Answer : d) insertions or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Description : Consider the following statements: 1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential. 2. Upon excitation, the resting potentialis suddenly changed. 3. It is due ... 1, 2, 3 (b) 2, 3 (c) 1, 2, 3, 4 (d) 1, 2, 4
Last Answer : Ans:(d)
Description : Consider the following statements: 1. In a resting neuron, there is difference in electrical charge on either side of surface membrane called potential difference. 2. It is due to unequal distribution of K+ ions and Na+ ions on either side if the ... ? (a) 1 only (b) 1, 2 (c) 1, 2, 3 (d) 1, 2, 3, 4
Last Answer : Ans:(b)
Description : The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. (a) C - ... air. (d) B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.
Last Answer : (a) C - Alveoli - Thin walled vascular bag like structures for exchange of gases.
Description : Which of the following statement(s) is/are true concerning the cell plasma membrane? a. The plasma membrane is composed of amphipathic molecules b. The hydrophobic core of the lipid bilayer of the ... contribute to the cell coat d. The membrane proteins of nerve cells are highly voltage-dependent
Last Answer : Answer: a, b, d The plasma membrane defines the boundary of the cell and serves to contain and concentrate enzymes and other macromolecule constituents. The plasma membrane is ... and bear carbohydrate moieties primarily as oligosaccharide chains that contribute to the cell coat or glycocalyx
Description : The process by which cell can take in fluid and molecules too large to be carried across the plasma membrane by active transport is called a. phagocytosis b. Pinocytosis c. absorption d. diffusion
Last Answer : Pinocytosis
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : C
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar Structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : (C) The steroid nucleus form forms a rigid, planar Structure
Description : Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma
Last Answer : (c) Trichoderma, Baculovirus, Bacillus thuringiensis
Description : A child has been admitted to your school who belongs to a back ward family/background from the cultural viewpoint. You will Options: A) keep him in a class in which, there are many more ... arrangements for teaching him, keeping his special needs in view D) Advise him to take up vocational education
Last Answer : C) keep him in a normal class but will make special arrangements for teaching him, keeping his special needs in view
Description : Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching. A) Vacuum B) Air blast C) SF6 D) Oil
Last Answer : Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching. A) Vacuum B) Air blast C) SF6 D) Oil
Description : Components of the cell membrane constantly shift. The _____ model describes this characteristic of the cell membrane?
Last Answer : The fluid mosaic model is a model of the cell membrane.
Description : Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by (A) Keeping the heat transfer surface clean (B) Enhancing the fluid pumping rate (C) Increasing the tube length (D) None of these
Last Answer : (A) Keeping the heat transfer surface clean
Description : A sphere of radius 'R1 ' is enclosed in a sphere of radius 'R2 '. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is (A) 0 (B) R2 /(R1+R2 ) (C) 1 (D) (R1 /R2 )
Last Answer : (B) R2 /(R1+R2 )
Description : Which of the following statements is not correct? (1) A Money Bill shall not be introduced in the Council of States (2) The Council of States has no power to reject or amend a Money Bill ( ... The House of the People has special powers with respect to the State List compared to the Council of States
Last Answer : (4) The House of the People has special powers with respect to the State List compared to the Council of States Explanation: The Constitution empowers Parliament of India to make laws on the matters ... Sabha. So the House of eople does not have special powers with respect to the state list.
Description : Which of the following statements is/are not correct with respect to the Constant Mix Strategies' of asset allocation? I. Investors adopting these strategies tend to maintain an exposure to stocks that are in constant ... strategies. A. Only (I) above B. Only (II) above C. Only (III) above
Last Answer : C. Only (III) above
Description : Which one of the following statements is correct with respect to AIDS? (a) The HIV can be transmitted through eating food together with an infected person. (b) Drug addicts are least ... and nutrition. (d) The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers.
Last Answer : (d) The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers.
Description : Which of the following statements is correct concerning the auditor's responsibility with respect to illegal acts? a. An auditor must design tests to detect both direct-effect and indirect- ... auditor must design tests to detect both material direct-effect and material indirect-effect illegal acts
Last Answer : An auditor must design tests to obtain reasonable assurance of detecting material direct-effect illegal acts.
Description : Which of the following statements in NOT TRUE with respect to the unification of Italy? a. Due to the failure of revolutionary uprisings in 1831 and 1848, the mantle fell on Sardinia-Piedmont to unify ... the Spanish rulers. d. In 1861, Kaiser William I was proclaimed king of united Italy. Correct
Last Answer : d. In 1861, Kaiser William I was proclaimed king of united Italy. Correct
Description : With respect to the concept of materiality, which one of the following statements is correct? a. Materiality is a matter of professional judgment. b. Materiality is determined by reference to AASC's ... depends only on the peso amount of an item relative to other items in the financial statements
Last Answer : Materiality is a matter of professional judgment
Description : Which one of the following statements is correct with respect to kidney function regulation? (a) When someone drinks lot of water, ADH release is suppressed. (b) Exposure to cold temperature ... During summer when body loses lot of water by evaporation, the release of ADH is suppressed.
Last Answer : (a) When someone drinks lot of water, ADH release is suppressed.
Description : Which one of the following statements is correct? (A) The soundings are made with respect to the mean low water (B) The soundings which are below the datum are written in black on the map (C) The spot heights of the features above datum are written in red on the map (D) All the above
Last Answer : (D) All the above
Description : Consider the following statements in respect of critical flow in a wide rectangular channel: 1. The specific energy is minimum for a given discharge. 2. The discharge is maximum for a given specific energy 3. The specific force is minimum for a ... b) 1, 2, 3 & 4 (c) 1, 2 & 4 only (d) 2, 3 & 4 only
Last Answer : (b) 1, 2, 3 & 4
Description : Consider the following statements: 1. Standard penetration test is commonly used for cohesionless soils. 2. Standard penetration test results in respect of a cohesionless soil are correlated to its density index and friction angle. 3. Use of H- ... 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only
Last Answer : (a) 1, 2 & 3
Description : Consider the following statements : 1. There is no flow across a streamline 2. Streamline spacing varies directly with velocity at the section 3. Streamlines do not cross 4. In steady flow, streamline pattern does not change with ... 4 (b) 1 and 2 only (c) 1, 3 and 4 only (d) 2, 3 and 4 only
Last Answer : (c) 1, 3 and 4 only
Description : Which one of the following statements is not correct with respect to PSC beams? (a) Loss due to shrinkage is proportional to water-cement ratio used in concrete (b) Loss due to creep is ... to the modulus of elasticity of concrete (d) Loss due to friction occurs in post tensioned concrete members
Last Answer : (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete
Description : Consider the following statements in respect of design of web and flange as splices: 1. Flange splice shall be designed for actual BM at the section. 2. Flange splice shall be designed to resist the actual shear at the section. 3. Web ... are correct? (a) 1 and 3 (b) 2 and 3 (c) 3 and 4 (d)1 and 4
Last Answer : (a) 1 and 3