4046 You have isolated an unidentified liquid from a sample

40-46

You have isolated an unidentified liquid from a sample of beans. you add the liquid a and other of molecules quid separate into vigorously, After a few minutes, the and the other liquid separate into two layer. To which class of large biological molecules dies the unknown liquid most likely belong? Carbohydrates lipids proteins Enzymes Nucleic acids. A molecule that has an important role in limiting what gets into and out of glucose maltose phospholipid fat phosphohexose The portion of a phospholipid that contains the phosphorous group has o more electric charges. That makes this region of the molecule hydrophobic hydrophilic. nonpolar unsaturated. saturated A fat contains fatty acids and glycerol. a base an amino acid. a phosphate. None of the above A base present in DNA but not RNA is uracil thymine cytosine adenine A nucleotide contains a pentose, a phosphate, and a(n) lipid acid nitrogen-containing base amino acid.

Solution

41.. When isolated liquid is added in to water and the beaker is shacked, water soluble material will dissolve in to water layer and liquid layer will contain only fat soluble or lipophillic molecules like lipid molecules.

42. Phospholipid is the main content of the cell membrane which control the movement of the molecules across the cell membrane.

43. Phospholipid consist of a glycerol, two fatty acid molecules and one phosphate group. Phosphate group. which is negatively charged and hydrophilic in nature, forms polar head. The fatty acids are uncharged , non polar and hydrophobic in nature , forms nonpolar tails.

44. Fat consist of three fatty acids and a glycerol. The fatty acids are attached to each carbon of the glycerol molecule with an ester bond. Fats are also called triglycerides or tryglycerol.

45. DNA molecule contains adenine, guanine, cytosine and thymine bases whereas RNA molecule contain Uracil base in place of thymine base.

46. Nucleotide made up of Pentose sugar, a phosphate group and nitrogenous base pairs and Nucleoside contain only pentose sugar and nitrogenous base pairs.