Which of the sugars in the following figure is/are D sugars? Choose all correct answers. CHO CHO CHO CHO НО H Н- НО H- Н OH Н OH ОН CH₂OH A Н- H H H ОН OH OH OH CH₂OH в Н HO H НО OH -H -ОН -H І CH OH C НО НО -H -OH -H H CH2OH D
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- Place an asterisks (*) next to the 3' carbon atoms in the polynucleotide shown. -O CH₂ HOHDH Guanine -O-CH₂ H H H Thymine =P-O-CH₂ H OH Answer Bank H H CytosineDraw the structure of the following nucleotide: adenosine 3'-monophosphate or guanosine 2-monophosphateChoose all of the statements that correctly describe the base pairs drawn below. A C H H-N -H-N N-H- -N B H D موعة Rita N -H---- 2 NHN O- -H-N H -H- N- -H-N The non-Watson-Crick base pair shown in A is much less stable than the base pairs shown in B and C, because the smaller size of the two pyrimidine bases induces a distortion in the structure of the double helix that decreases the stability of the helix when compared to helices with the normal Watson-Crick base pairs. The base pair shown in B is found in BOTH DNA and RNA The base pair shown in C is found ONLY in RNA and NOT DNA The base pair seen in B is more stable than the Watson-Crick base pair shown in C partly because of a larger number of hydrogen bonds and partly because of more favourable pi-stacking interactions with adjacent base pairs.
- According to Chargaff's rule of nitrogenous base pairing, which of the following statements is correct? If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in a DNA molecule. If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in an RNA molecule. If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine equals the sum of all thymine in a DNA molecule. If all adenine bonds to uracil and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all uracil in an RNA molecule.Amino acids have an average molar mass of 100 g/mol.How many bases on a single strand of DNA are needed to codefor a protein with a molar mass of 5x10^5g/mol?Write the complementary sequence for the following DNA sequence, in order from 3' to 5': 5′−CGATATTGAGCTAAGCTT−3′
- The proposed model of the DNA double helix by Watson and Crick was based on earlier findings the DNA structure is a helix and that the number of bases or nucleotide C+A is always equal to G + T. With this in mind, what is the number of hydrogen bonds that hold this DNA helix with the following sequence: AGGTCTTCGTGGCCTA TCCAGAAGCACCGGAT 28 58 41 38A typical bacterial DNA has a molar mass of 4 × 109 g m ol-1 . Approximately how many nucleotides does itcontain?Name the following nucleotide: HN -0-P -0-CH2 OH
- If you analyze a double-stranded DNA molecule and find that 15% of all the nucleotide bases are Adenines, you know that there must also be [ Select ] Thymines, [ Select ] Guanines, [ Select ] v Cytosines and [ Select ] Uracils. (Count each of the bases in any double stranded DNA molecule and calculate their percentages to find the simple key for this if you haven't seen it yet.)Give a possible nucleotide sequence for the template strand of the gene that codes for this tripeptide. 0 H H 0 H OH H H ILL Note: Reference the Genetic code table for additional information. 3¹--5 DNA sequence XDerivatives of purines and pyrimidines make up the base component of nucleotides. Select the positions in the purine ring of a purine nucleotide in DNA that have the potential to form H. hydrogen bonds but do not participate in Watson–Crick 6 base pairing. N С-6 N-1 8 CH C-5 12 HC 4 9 С-2 N. H С-8 Purine N-7 N-9 N-3 O C-4 O O