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The blackbone of
A-a phosphodiester bond between the 2'and 5' hydroxyl groups of neighbroing sugers
B-a phosphodiester bond between the 3' and 5' hydroxyl groups of neighboring sugers
C- a glycosidic bond between a purine and a sugar
D- a glycosidic bond between a pyrimidine and a sugar
A nucleotide is formed by nitrogenous base, sugar and phosphate.
The sugar could be ribose or deoxyribose.
The commonly found bases in DNA and RNA are adenine, guanine, thymine, cytosine and uracil.
Nucleotides polymerization makes up nucleic acid.
There are two main type of nucleic acids- DNA and RNA.
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- Which of the following is true regarding the glycosidic bond between the pentose sugar and nitrogenous bases? Select all the apply. O C1 of pentose sugar is covalently bonded to N9 of purine bases O C1 of pentose sugar is covalently bonded to N3 of pyrimidine bases O C1 of pentose sugar is covalently bonded to N1 of pyrimidine bases O C5 of pentose sugar is covalently bonded to N1 of pyrimidine bases O C1 of pentose sugar is covalently bonded to N3 of purine bases O C5 of pentose sugar is covalently bonded to N9 of purine basesWhich of the following statements is correct regarding the structures below? CHO CHO H-OH ОН н ОН НО H НО -Н н- ОН CH₂OH CAB All are structures of D-sugars. All are structures of ketohexoses. Only CAR is a monosaccharide. 0 Only CAP is a L-sugar. Н I H CHO -ОН H-OH H-OH н- -ОН CH₂OH CAR H-OH -ОН НО-Н то н- H-OH CH₂OH CAP CH2OH to HO-H НО-н Н 1 - он CH₂OH CATWhich of the following statements is correct regarding the structures below? CHO CHO CHO -Н НО H НО н- ОН -Н - ОН CH2OH CAB All are structures of D-sugars. All are structures of ketohexoses. Only CAR is a monosaccharide. O Only CAP is a L-sugar. -ОН -ОН H-OH H-OH H- ОН CH₂OH CAR но-н H-OH н НО т н-он CH₂OH CAP CH₂OH Fo НО-Н H НО-Н H он CH₂OH CAT
- Which of the following is the correct glycosidic bond linkage of the disaccharide shown? β-(1→6) glycosidic bond α-(1→6) glycosidic bond α-(1→1) glycosidic bond β-(1→1) glycosidic bondWhich of the following statements is TRUE for the enantiomer of the given monosaccharide? * ҫH,он H- -C-OH Но с -н H-C-OH ČH,OH It is an L-sugar that has opposite configuration around one carbon. It is a D-sugar that has opposite configuration around three carbons. O It is an L-sugar that has opposite configuration around three carbons. O It is a D-sugar that has opposite configuration around one carbon.Sphingolipids are considered as phospholipids if: O The polar head group contains a single sugar (carbohydrate) such as glucose All sphingolipids are phospholipids O The polar head group contains a phosphate group The polar head group contains a complex sugar (carbohydrate) containg sialic acid
- Which of the following differentiates chitin with cellulose? Chitin has the alpha (1-4) glycosidic linkage O Chitin has an amino derivative of glucose O Chitin is a polysaccharide and cellulose is a disaccharide Chitin has the beta (1-4) glycosidic linkage.Consider the structure of the tripeptide (in its fully protonated form) below. H H H + I || H₂N-C-C-N-C-C-N-C-C-OH 1 I | H CH₂ H CH₂ CH₂ T C=O OH AA1 0=0 || HC-CH3 CH3 AA2 AA3 0=C 1. Give the sequence of the tripeptide using the ONE-LETTER DESIGNATION (UPPERCASE LETTER) with NO spaces and symbols between each letter. 2. How many ionizable groups are there in the tripeptide? Give the numerical value (e.g., 10 not ten). • pH 10: {Choices: -2, -1, 0, +1, +2} 3. Which amino acid residue has one ionizable group left upon forming the tripeptide? {Choices: AA1, AA2, AA3, none, all} 4. Give the net charge of the dominant structure of the tripeptide at the given pH values. The pK, values of the amino acids are given in Table 1. • pH 4: {Choices: -2, -1, 0, +1, +2}A Uracil B Adenine HN Cytosine Guanine 2 H₂N-C 6 3 N Which of the following nitrogenous bases is represented by this structure? 5 C C N 7 IZⓇ 8 CH
- 2) Consider the following disaccharide which was formed from the breakdown of a polysaccharide found in plant material. ОН Glycosidic linkage: H H OH H H НО H H. OH H. ОН OH H НО H ОН a. Label the glycosidic linkage above in the following format: a/B(# → #) b. Would you expect this disaccharide to have been formed from amylose or amylopectin? c. Describe at least two chemical tests that would give insight into the structure of this disaccharide, assuming you've isolated it and wanted to elucidate the structure from scratch. Include detail on not only the tests you would use but what results you would expect to get given the structure above. Assume you can analyze the structure of any monosaccharide you get from your chemical tests.Look at the structure of the disaccharide shown. Name the type of bond which is present. CH,OH H H он но CH2 Он H он H ÓH O B - 1, 4- N-glycosidic linkage O a- 1, 4- O-glycosidic linkage O B- 1, 4-0-glycosidic linkage O a- 1, 6- 0-glycosidic linkage O a- 1, 4- N-glycosidic linkage1) Which of the following statement(s) regarding the ends of polysaccharides are true? All polysaccharides have at least one reducing end. Some polysaccharides may have no reducing end. Some polysaccharides may have no non-reducing ends. All polysaccharides have a N-glycosidic bond at their reducing ends. none of the above 2) The transformation of a monosaccharide into its ______ occurs easily and does not require the assistance of a catalyst. epimer anomer sugar alcohol diastereomer zwitterion