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- 11. all of the following give a positive results in benedict test exept: O galactose xylose glucose fructose trehalose1. What is this lipid structure, give its role/ function, and enumerate its hydrolysis products or components. 2. Explain which hydrolyzed component will be positive in the Acrolein test? Ninhydrin test?Which of the following elements is not a micronutrient? boron calcium chromium manganese
- 1. Breaking of disulfide bonds in albumin to produce -SH is most likely caused by?* Acetic acid Alcohol Reducing agents Sun (ultraviolet radiation) 2. Positive with Molisch Test, but negative with both Iodine Test and Benedict's Test.* Glucose Fructose Ribose/Arabinose Maltose Sucrose 3. Which of the following is not a reducing sugar?* Sucrose Glucose Fructose Lactose9. Which of the following is a compound lipid?| ApoE Аров Аров ApoA ApoC Аров O lipoprotein inacar Ruie P han Cattyn Fre on Pap Cnoplaam glycolipid16. The lipopolysaccharide of Gram-negative bacteria is composed of the following EXCEPT: Polysaccharide Lipoteichoic acid Phospholipid O-Polysaccharide
- Which of the structures above is a component of sucrose and predominantly forms a furanose ring structure? A. H C I H-C-OH НО-С-Н I Н-С-ОН I H-C-OH I CH2OH A В D B. H =O но-с-н I но-с-н I н-с-он Н-С-ОН I CH₂OH CH2OH I c=0 I но-с-н I H— C -ОН H— C-OH CH₂OH D. COOH H-C-OH НО-С-Н I но-с-н I н-с-он CH₂OH13. Which statement(s) correctly describe this disaccharide? CH2OH CH2OH A. It's the alpha anomer, and it's a reducing sugar. CH-O CH-O OH B. It's the alpha anomer, and it's a nonreducing sugar. CH CH CH CH OH C. It's the beta anomer, and it's a reducing sugar. ОН СН—СH CH-CH D. It's the beta anomer, and it's a nonreducing sugar. OH OH OHThe Xanthoproteic test involves what type of reaction? O Elimination reaction Pericyclic reaction O Electrophilic aromatic substitution Nucleophilic aromatic substitution
- 8. The brick red color formed in a positive result of Benedict's test comes from A. the oxidation of copper ions B. the reduction of copper ion C. the reduction of carbonyl group D. the oxidation of carboxyl group E. the breakdown of glycosidic linkage 9. The following molecule is a но H Н-С—N — С H H H H-N-C -C-0-P-0-C -H H H H H A. triacylglycerol B. steroid hormone C. phospholipid D. o-6 fatty acid E. cholesterol 10. Which of the following statements about nucleic acid is INCORRECT? A. Coenzyme A is a protein, not nucleic acid B. NAD is an example of nucleic acid C. Adenine base is the same in ribonucleotide and deoxyribonucleotide D. Helix is an example of the secondary structure of nucleic acid E. Hydrogen bond can be found in DNA 11. The nucleoside consists of a D-deoxyribose and a cytosine base is called A. cytidine B. deoxycytidine C. deoxycytidylate D. deoxyribosylcytosine E. deoxyribosylcytidineA bi O=P-O-CH₂ 0- D Ribose sugar H H- B E N HH F OH H H. C NGN -H N H N H6. Treatment of cholesterol with mCPBA results in formation of a single epoxide A, with the stereochemistry drawn. Why isn't the isomeric epoxide B formed to any extent? H. H H HO HO A B
