TUESDAY, January 7 2018-IN CLASSs of isomers 40 Which of the following are examp
ID: 191207 • Letter: T
Question
TUESDAY, January 7 2018-IN CLASSs of isomers 40 Which of the following are examp (a) glucose and galactose (b) alanine and glyeine (c) adenine and guanine (d) glycogen and cellulose WA and RxA are diferent oypes of nucheic acid polymer. Which of the following is true of DNA but not true of RNA? (a) (b) (c) It contains uracil. It contains thymine. It is single-stranded. It has 5 to-3 directionality y types of cells have stores of lipids in their cytoplasm, usually seen as fat droplets. What is (d) 42 Many se droplets? the lipid most commonly found in the (a) cholesterol (b) palmitic acid (c) isoprene (d) triacylglycerol tial the following statement: Cholesterol is an essen membranes. Although it is much smaller than the typical 43 Choose the answer that best fits component of biological molecule, having both phospholipids and glycolipids in the membrane, it is a(n) hydrophilic and hydrophobic regions (a) polar ng (c) hydrophobic (d) amphipathic 44 Both DNA and RNA are synthesized by covalently linking a nucleoside triphosphate to the previous nucleotide, constantly adding to a growing chain. In the case of DNA, the new strand ble helix. The two s becomes part of a stable helix. The two strands are com plementary in sequence and antiparallel in directionality. What is the principal force that holds these two strands together? (a) ionic interactions (b) hydrogen bonds (c) covalent bonds d) van der Waals interactions s Macromolecules in the cell can often interact transiently as a result of noncovalent interactions. These weak interactions also produce stable, highly specific interactions betwee molecules. Which of the factors below is the most significant in determining whether thee interaction will be transient or stable? the size of each molecule the concentration of each molecule the rate of synthesis surface complementarity between molecules (a) (b) (c) (d) The variety and arrangement of chemical groups on monomer subunits contribute to the conformation, reactivity, and surface of the macromolecule into which they becomeExplanation / Answer
40) Which of the following are examples of isomers:
a) Glucose and galactose
41) Which of the following is true of DNA but not true in RNA:
b) It contains thymine
42) Many types of cells have stores of lipids in their cytoplasm, usually seen as fatdroplets. What is the lipid most commonly found in these droplets?
d) triacylglycerol
43) It is an d) amphipathic molecule, having both hydrophilic and hydrophobic regions.
44) What is the principal force that holds these two strands together?
b) Hydrogen bonds
45) Macromolecules in the cell can often interact transiently as a result of non covalent interactions. These weak interactions also produce stable, highly specific interactions between molecules. Which of the factors below is the most significant in determining whether the interaction will be transient or stable?
d) Surface complementarity between molecules