Genetic Code and Regulation Which of the following techniques was carried out by Nirenberg and Matthaei in 1961 to determine the first codon? Mixed co-polymer mRNA synthesis None of these In vitro synthesis of a polypeptide using UUUUU Labeled peptide binding to a ribosome Mixed co-polymer mRNA synthesis None of these In vitro synthesis of a polypeptide using UUUUU Labeled peptide binding to a ribosome ANSWER DOWNLOAD EXAMIANS APP
Genetic Code and Regulation In protein synthesis in prokaryotes the initiating amino acid is N- formyl methionine the initiating amino acid is methionine None of these the initiating amino acid is phenyl alanine the initiating amino acid is N- formyl methionine the initiating amino acid is methionine None of these the initiating amino acid is phenyl alanine ANSWER DOWNLOAD EXAMIANS APP
Genetic Code and Regulation Bacterial protein called catabolic activator protein (CAP) is an example of positive control of gene expression negative control of gene expression second type of positive control of gene expression None of these positive control of gene expression negative control of gene expression second type of positive control of gene expression None of these ANSWER DOWNLOAD EXAMIANS APP
Genetic Code and Regulation Crick demonstrated that the genetic code involved three bases and suggested that the code was degenerated. What experimental technique Crick conducted to suggest genetic code degeneration? Restriction digests of the rII gene Frameshift mutagenesis Gel electrophoresis Density gradient centrifugation Restriction digests of the rII gene Frameshift mutagenesis Gel electrophoresis Density gradient centrifugation ANSWER DOWNLOAD EXAMIANS APP
Genetic Code and Regulation The genetic code is degenerated. Which of the following codons represents the principle of degeneracy? UAA and UAC UUA and UUC AUG and AUA CAU and CAC UAA and UAC UUA and UUC AUG and AUA CAU and CAC ANSWER DOWNLOAD EXAMIANS APP
Genetic Code and Regulation Which of the following has been used as an evidence that primitive life forms lacked both DNA and enzymes? RNA can both code genetic information and act as a catalyst DNA and enzymes are only present in the most advanced cells Advanced cells lack RNA All of these RNA can both code genetic information and act as a catalyst DNA and enzymes are only present in the most advanced cells Advanced cells lack RNA All of these ANSWER DOWNLOAD EXAMIANS APP
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