a serves as structural components of human cells forms the regulatory molecules
ID: 146289 • Letter: A
Question
a serves as structural components of human cells forms the regulatory molecules known as enzymes erves as a source of energy for cells helps prodect vital organs from damage e contains the penetic information of a cell her? 1 Which p is composed entirely of beta-glucose units covalendly bonded soget 32. The cell wall of plase cells is composed of which of the following? e. fibronectins and glycoproteins b. Chitin b cellulose speptidogycan (d) phospholipid bilayer 33. Which of the following are common drates for emergy storage in cells? b. plhospholipids b. steroid arch or glycogem d 34. How do phospholipids interact with water molecules? cholesterol e.triglycerides a. The polar heads avoid water; the nonpolar tails attract water (because water is polar and atract) b. Phospholipids do not interact wikth water because water is polar and lipids are The polar heads interact with water, the nonpolar tails do not · Phospholipids dissolve in water 35. Which of the following are molecules that have the same composition of atoms but differ in structurs and/or bonding association? 36. Which of the following is a storige potysaccharide commonly found in the cells of animals 37. What is che chemical reaction mechanism by which cells make polymers from monomers? lsotopes b.isomers c.free radicals catalysts e' ims b. Glucose b. sucrose starch dycogen e. cellulose a phosphodiester linkages b. hydrolysis dehydration reactions d ionic bonding of monomers e. the formation of disulfide bridges between monomers 38. On food packages, to what does the term insolwble aer refer? Cellalose b. Polypeptides . Starch (d. Amylopectin e 39. Lactose is composed of one glacose molecule joined by a glycosidic linkage to one galactose molecule. How is a disaccharide e. as a polysaccharide lactose classified? a. as a pentose b. as a hexose c. as a monosaccharide Why can humans digest starch but not cellulose? a- the monomer of starch is glucose, while the monomer of cellulose is galactose b humans have enzymes that can hydrolyze the B glycosidic linkages of starch but not the a glycosidic linkages of e cellulose chumans have enzymes that can hydrolyze the a glycosidic linkages of starch but not the B glycosidic linkages of 40. cellulose d humans harbor starch-digesting bacteria in the digestive tract the monomer of starch is alpha glucose, while the monomer of cellulose is glucose with an amino group 41. Chitin is a major component of. a the skeleton of mammals b. cell walls of fungi c the exoskeleton of insects and crustaceans d. cell walls of bacteria Both answer choices b and c are correct 42. In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom byt20Explanation / Answer
ans 31...d..cellulose
cellulose is a polysachride that is formed by beta 1,4 glycosidic linkage only.
maltose is incorrect because maltose no doubt has only glucose but maltose is not a polysachride.it is an disachride having only 2 molecule of glucose
ans 32..b... cellulose
plant cell wall is made up of cellulose.
phospholipid bi layer form the plasma membrane and not the cell wall.
ans 33..starch or glycogen
in plant cell energy is stored in the form of starch and in animal cell it is stored in the form of glycogen.
ans 34...c...polar head intract with water and the non polar head do not.
plamma membrane has a bilayer in which each layer has a polar head and non polar tail.because of this non polar tail water can not move thrrough the cell easily.
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