35) A nucleotide is a three subunit molecule consisting of a phosphate group res

Question

35) A nucleotide is a three subunit molecule consisting of a phosphate group residue, a nitrogen containing heterocyclic base residue, and a hexose sugar residue. a) True b) False 36) The sugar in DNA is ribose a) True b) False the percent guanine content. a) True b) False 38) The process by which a DNA molecule makes an exact duplicate of itself is called a) True b) False 39) The double helix in DNA is held together by disulfide bonds. a) True b) False 40) Four different isomeric polypeptides could be assembled from three different peptides joined together a) True b) False 41) A single strand of mRNA can direct the synthesis of only one protein molecule at a time. a) True b) False 42) Two different codons that code for the same amino acid are called synonyms a) True b) False 43) Post translation processing is the process by which hnRNA is "edited" to form mRNA a) True b) False 44) Since RNA is a single strand molecule, complementary base pairing is not possible in RNA. a) True b) False 45) The anticodon for the codon 5' UGC 3' would be 5' TCG 3 a) True b) False 46) A sequence of four nucleotides would contain four phosphatediester linkages. a) True b) False

Explanation / Answer

35) A nucleotide is a 3 subunit molecule consisting of phosphate group residue, a nitrogen containing heterocyclic base residue and a hexose sugar residue -false it contain five carbon sugar residue

36) The sugar in DNA is ribose - false it contain deoxyribose

37) In DNA the percent adenine contain is equal to percent guanine content- false percent adenine = percent thymine

38) The process the DNA molecule makes an exact duplicate of itself is called transcription- false it is called replication

39) The double helix in DNA is held together by disulphide bonds - false held together by covalent and hydrogen bonding

40) Four different isomeric polypeptides could be assembled from three different peptides joined together- false requires four diferent peptides

41) A single stranded of mRNA can direct the synthesis of only one protein molecule at a time - false it can synthesise multiple identical proteins

42) Two different codons that code for the same aminoacid are called synonyms - True

43) Post translation processing is the process by which hnRNA is edited to form mRNA - True because this invovles in the phosphorylation(addition of methyl guanosine triphosphate to the 5' end of mRNA)

44) Since RNA is a single stranded molecule, complementary base pairing is not possible in RNA- false intramolecular base pairing can be occured

45) The anticodon for the codon 5' UGC 3' would be 5' TCG 3'- false it is 3' ACG 5'

46) A sequence of four nucleotides would contain four phosphodiester linkages- true

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