Concept explainers
(a)
Interpretation:
The role of hydrophobic interactions in stabilizing the double-stranded DNA has to be discussed.
Concept Introduction:
The groups which are not present in contact with the aqueous medium (or) which repels the water molecules are said to be hydrophobic in nature.
The DNA molecule is made up of nucleotides which consist of Nitrogenous bases, Sugar molecules and Phosphate ions. The Nitrogenous bases are two types: Purines and Pyrimidines. The Purine bases are Adenine and Guanine. The Pyrimidine bases are Cytosine and Thymine. In the formation of the DNA molecule the bases are paired with each other (Purine base with Pyrimidine base). The pairing occurs as A-T and G-C, the Adenine base containing
(b)
Interpretation:
The role of hydrophobic interactions in stabilizing the Lipid bilayers has to be discussed.
Concept Introduction:
The groups which are not present in contact with the aqueous medium (or) which repels the water molecules are said to be hydrophobic in nature.
The lipid bilayer is a thin polar membrane made up of two layers of lipid molecules. The lipid bilayer is the major constituent in the cell membrane (or) plasma membrane of the cells, which is selectively permeable.
(c)
Interpretation:
The role of hydrophobic interactions in stabilizing the Soap micelles has to be discussed.
Concept Introduction:
The groups which are not present in contact with the aqueous medium (or) which repels the water molecules are said to be hydrophobic in nature.
The soap micelle is defined as when the soapy water is mixed with grease or dirt, the soap molecules forms tiny clusters which are called as micelles.
Want to see the full answer?
Check out a sample textbook solutionChapter 28 Solutions
Organic Chemistry
- 22-97 Gelatin is derived from collagen by denaturation. Is a gelatin dessert likely to be a good source of dietary protein?arrow_forward22-53 Do iron and zinc ions play role in protein structure? If so, what is the role for either or both?arrow_forward22-62 Distinguish between intermolecular and intramolecular hydrogen bonding between backbone groups. Where in protein structures do you find one, and where do you find the other?arrow_forward
- Explain what is meant by the following :(i) peptide linkage(ii) pyranose structure of glucosearrow_forward(a) Calculate the osmotic pressure in atm. and osmolarity in aqueous solution containing 0.15 mol L-1 KCl, 0.01 mol L-1 of CaCl2 and 0.1 mol L-1 of disaccharide lactose at 20 oC. (b) What will be the osmotic pressure and osmolarity in this solution if all lactose is hydrolysed to monosaccharides glucose and galactose?arrow_forwardDraw the structure of each of the following tripeptides:(a) Aspartic acid-histidine-tryptophan(b) Glycine-cysteine-tyrosine with the charges existing in cell fluidarrow_forward
- (a) A certain lipid has the structure shown below (R1 and R2 are fatty acyl chains). Could a sample of these molecules form a bilayer? Why or why not? (b) Would phospholipase A1 be able to use this molecule as a substrate? Why or why not?arrow_forwardHexadecyltrimethylammonium chloride, CH3(CH2)15N(CH3)+3 Cl-, is one of a class of cationic detergents, commonly used inshampoos and as “clothes rinses.”(a) Identify the hydrophilic head group and the hydrophobic tail.(b) Draw a depiction of a micelle that would form if this compound were dissolved in water.(c) What are the intermolecular forces that are primarily responsible for the micelle’s solubility in water?arrow_forwardIn a theoretical study of protein-like polymers, the phase diagram shown was obtained. It shows three structural regions: the native form, the unfolded form, and a 'molten globule' form. (a) Is the molten-globule form ever stable when the denaturant concentration is below 0. 1? (b) Describe what happens to the polymer as the native form is heated in the presence of denaturant at concentration 0. 15.arrow_forward
- From examination of the molecular models i–v, choose thesubstance that (a) can be hydrolyzed to form a solutioncontaining glucose, (b) is capable of forming a zwitterion,(c) is one of the four bases present in DNA, (d) reacts withan acid to form an ester, (e) is a lipid.arrow_forwardFf.289.arrow_forward(i) Which one of the following is a disaccharide : Starch, Maltose, Fructose, Glucose?(ii) What is the difference between fibrous protein and globular protein?(iii) Write the name of vitamin whose deficiency causes bones deformities in children.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningIntroductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningWorld of ChemistryChemistryISBN:9780618562763Author:Steven S. ZumdahlPublisher:Houghton Mifflin College Div