Description : .Plasma membrane is made of (a) proteins and carbohydrates (b) proteins and lipids (c) proteins, lipids and carbohydrates (d) proteins, some nucleic acid and lipids.
Last Answer : (c) proteins, lipids and carbohydrates
Description : out of proteins; lipids and carbohydrates present in a cell membrane; what is true?
Last Answer : Carbohydrates are minimum
Description : What are the most diverse molecules in the cell? (a) Lipids (b) Mineral salts (c) Proteins (d) Carbohydrates (
Last Answer : (c) Proteins
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 : 06. A hydrophilic medicinal agent has the following property: a) Low ability to penetrate through the cell membrane lipids b) Penetrate through membranes by means of endocytosis c) Easy permeation through the blood-brain barrier d) High reabsorption in renal tubules
Last Answer : a) Low ability to penetrate through the cell membrane lipids
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 plasma membrane consists mainly of (a) phospholipids embedded in a protein bilayer (b) proteins embedded in a phospholipid bilayer (c) proteins embedded in a polymer of glucose molecules (d) proteins embedded in a carbohydrate bilayer
Last Answer : (b) proteins embedded in a phospholipid bilayer
Description : The basic structure of cell membranes (a) Is a lipid bilayer that serves as a barrier to water soluble molecules (b) Differs ultra structurally for internal and external membranes ... dispersed within a protein bilayer (d) Is visualised as bilaminar structure with transmission electron microscopy
Last Answer : Ans:(a)
Description : Nutrasweet, the artificial sweetener, contains molecules in which of the following groups? w) carbohydrates x) lipids y) amino acids z) nucleic acids
Last Answer : ANSWER: C--AMINO ACIDS
Description : Selectins are proteins that can recognise specific (A) Carbohydrates (B) Lipids (C) Amino acids (D) Nucleotides
Last Answer : Answer : A
Description : Degradation of proteins to amino acids, glucose from carbohydrates and fatty acids from lipids is known as (A) Anabolism (B) Metabolism (C) Catabolism (D) Cretinism
Last Answer : Answer : C
Description : The plants popularly known as 'petro crops' are rich in 1. Carbohydrates 2. Hydrocarbons 3. Proteins 4. Lipids The correct answer is: (a) 1, 2 and 3 (b) 1, 3 and 4 (c) 2, 3 and 4 (d) 2 and 4
Last Answer : Ans:(d)
Description : Enzymes belong to the category of (a) Proteins (b) Lipids (c) Carbohydrates (d) Steroids
Description : Amino acids are required for the synthesis of – (1) Alkaloids (2) Lipids (3) Proteins (4) Carbohydrates
Last Answer : (3) Proteins Explanation: Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for ... be synthesized and which must then be acquired via the diet are referred to as essential.
Description : Enzymes are - (1) Steroids (2) Carbohydrates (3) Proteins (4) Lipids
Last Answer : (2) Carbohydrates Explanation: Enzymes are proteins that speed up chemical reactions in the cell. They are highly selective catalysts, greatly accelerating both the rate and specificity of metabolic reactions. Most enzymes are proteins, although some catalytic RNA molecules have been identified.
Description : The green colour of the leaves is due to the presence of - (1) Proteins (2) Lipids (3) Chlorophyll (4) Carbohydrates
Last Answer : (3) Chlorophyll Explanation: The green color in leaves is caused by the presence of a compound called "chlorophyll," which the plant produces to do photosynthesis, which is how plants get energy from ... and so green is not absorbed and is reflected, making the plant look green to our eyes.
Last Answer : (3) Proteins Explanation: Enzymes are protein molecules in cells which work as catalysts. Most enzymes are proteins, although a few are catalytic RNA molecules; the latter are called ribozymes.
Description : The antibodies are (a) proteins (b) carbohydrates (c) lipids (d) germs.
Last Answer : (a) proteins
Description : Ribosomes help to synthesize a. carbohydrates b. proteins c. lipids d. minerals
Last Answer : proteins
Description : RNA is intimately associated with synthesis of which constituent of the cell. a. Carbohydrates b. Proteins c. Lipids d. Inorganics
Last Answer : Proteins
Description : During prolonged fastings, in what sequence are the following organic compounds used up by the body ? (a) First carbohydrates, next fats and lastly proteins (b) First fats, next ... carbohydrates, next proteins and lastly lipids (d) First proteins, next lipids and lastly carbohydrates
Last Answer : (a) First carbohydrates, next fats and lastly proteins
Description : The Golgi complex plays a major role (a) as energy transferring organelles (b) in post translational modification of proteins and glycosylation of lipids (c) in trapping the light and transforming it into chemical energy (d) in digesting proteins and carbohydrates.
Last Answer : (b) in post translational modification of proteins and glycosylation of lipids
Description : Biochemically the ribosome consists of _______________ and some 50 structural . (A) mRNA, Carbohydrates (B) tRNA, lipids (C) mRNA, Proteins (D) rRNA, Proteins
Last Answer : (D) rRNA, Proteins
Description : In which of the following class of substances would WAX be found? w) carbohydrates x) lipids y) proteins z) nucleic acids
Last Answer : ANSWER: LIPIDS
Description : Which of the following choices are considered to be polymers of amino acids? Are they: w) nucleotides x) carbohydrates y) lipids z) proteins
Last Answer : ANSWER: Z -- PROTEINS
Description : Peptide bonds are found in: a) carbohydrates b) lipids c) nucleic acids d) proteins
Last Answer : ANSWER: D -- PROTEINS
Description : Neutral fats, oils and waxes may be classified as: a) lipids b) carbohydrates c) proteins d) none of the above
Last Answer : ANSWER: A -- LIPIDS
Description : Bile has what function in digestion? a) emulsify lipids b) digest proteins c) gluconeogenesis (pron: glue-ko-nee-o-gen-e-sis) d) digest carbohydrates
Last Answer : ANSWER: A -- EMULSIFY LIPIDS
Description : Amino acids are required for the synthesis of : (1) Alkaloids (2) Lipids (3) Proteins (4) Carbohydrates
Description : Enzymes are (1) Steroids (2) Carbohydrates (3) Proteins (4) Lipids
Description : The enzymes are basically (1) carbohydrates (2) lipids (3) proteins (4) amino acids
Description : The green colour of the leaves is due to the presence of (1) Proteins (2) Lipids (3) Chlorophyll (4) Carbohydrates
Last Answer : Chlorophyll
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 : Cell recognition and adhesion occur due to biochemicals of cell membrane named (a) Proteins (b) Lipids (c) Proteins and lipids (d) Glycoproteins and glycolipids
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 : Vacuole in a plant cell (a) lacks membrane and contains air (b) lacks membrane and contains water and excretory substances (c) is membrane-bound and contains storage proteins and lipids (d) is membrane-bound and contains water and excretory substances.
Last Answer : (d) is membrane-bound and contains water and excretory substances.
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 : The ability of the cell membrane to act as a selective barrier depends upon (A) The lipid composition of the membrane (B) The pores which allows small molecules (C) The special mediated transport systems (D) All of these
Last Answer : D
Description : Which of the following statements regarding mitochondria is incorrect? (a) Mitochondrial matrix contains single circular DNA molecule and ribosomes. (b) Outer membrane is permeable to monomers of ... transport are embedded in outer membrane. (d) Inner membrane is convoluted with infoldings.
Last Answer : (c) Enzymes of electron transport are embedded in outer membrane.
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 : What characteristic of the plasma membrane allows selective molecules to pass through it?
Last Answer : It is semi-permeable.
Description : Which of the following components provides sticky character to the bacterial cell? (a) Nuclear membrane (b) Plasma membrane (c) Glycocalyx (d) Cell wall
Last Answer : (c) Nostoc
Description : The ________ provides fixed shape and rigidity to plant cell. a) cell wall b)cell membrane c)plasma lemma d)lysosome
Last Answer : a) cell wall
Description : Which of the following components provides sticky character to the bacterial cell ? (1) Nuclear membrane (2) Plasma membrane (3) Glycocalyx (4) Cell wall
Last Answer : (3) Glycocalyx
Description : What term describes the structure of a cell plasma membrane because of its oily nature and embebbed proteins?
Last Answer : fluid mosaic
Description : Which of the following statement(s) is/are true concerning cellular ion channels? a. Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane b. ... undergo conformational changes between open states and closed states d. Ion channels can be blocked
Last Answer : Answer: a, b, c, d Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane. Ion channels are formed by membrane-spanning peptides that are arranged ... be blocked by ions or organic compounds that enter the channel, bind there, and occlude the pore
Description : The transport of proteins out of the cell is termed exocytosis. Which of the following statement(s) is/are true concerning this process? a. Secretory vesicles fuse with the plasma membrane b. ... or a neurotransmitter d. A decrease in cytoplasmic calcium occurs as part of the secretion process
Last Answer : Answer: a, b, c Transport vesicles that bud off the Golgi network carry both material to be secreted from the cell and protein destined to become components of the plasma ... but may also involve generation of diacylglycerol or production of cyclic AMP which activate kinases or phosphatases
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 : 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