Answer: FALSEDiff: 3 Page Ref: 4014) Every adenine nucleotide of DNA will be transcribed into a thymine on the mRNA.Answer: FALSEDiff: 3 Page Ref: 4215) The exon is cut from the original mRNA sequence, leaving the intron as the portion of mRNA that leaves the nucleus to be translated into a protein.Answer: FALSEDiff: 4 Page Ref: 4316) The mRNA codon UUU codes for the amino acid phenylalanine. Therefore, no other codon can code for phenylalanine. Answer: FALSEDiff: 4 Page Ref: 4217) Each strand of mRNA is translated by one ribosome at a time.Answer: FALSEDiff: 5 Page Ref: 4618) The Golgi apparatus sorts and packages proteins into vesicles targeted for their final destination.Answer: TRUEDiff: 3 Page Ref: 4728
19) The anticodon is complementary to the triplet coding for a particular amino acid.Answer: FALSEDiff: 5 Page Ref: 4520) The hormone insulin is a peptide hormone consisting of two polypeptides held together by disulfide bridges.Answer: TRUEDiff: 5 Page Ref: 4721) The semiconservative nature of the replication of DNA means that a new strand is coupled toan old strand.Answer: TRUEDiff: 3 Page Ref: 5022) When insulin is first translated by ribosomes, the initial inactive polypeptide that is formed iscalled preinsulin.Answer: FALSEDiff: 3 Page Ref: 4723) Bonding between Okazaki fragments forms the lagging strand of DNA.Answer: TRUEDiff: 4 Page Ref: 5024) Helicase catalyzes the uncoiling of DNA during transcription.Answer: FALSEDiff: 4 Page Ref: 5025) Proteases break peptide bonds.Answer: TRUEDiff: 4 Page Ref: 4926) Microtubules are dynamic structures in that they may form and disassemble repeatedly in a cell.Answer: TRUEDiff: 3 Page Ref: 38 27) The mitotic spindle forms from the centrosome during cell division. Answer: FALSEDiff: 5 Page Ref: 3629
2.3 Matching QuestionsMatch the following descriptions to the correct level of protein structure.A) primaryB) quaternaryC) secondaryD) tertiary1) Applies to proteins containing more than one polypeptide chain.Diff: 4 Page Ref: 242) The sequence and number of amino acids in the polypeptide chain.Diff: 4 Page Ref: 243) Formed by chemical interactions between R groups within the same polypeptide chain.Diff: 4 Page Ref: 244) Formed by hydrogen bonds between the amino hydrogen and carboxyl oxygen of amino acids within the same polypeptide chain.Diff: 4 Page Ref: 24Answers: 1) B 2) A 3) D 4) CMatch the following descriptions with the correct junction type.A) desmosomesB) gap junctionsC)tight junctions 5) Intermediate filaments penetrate the membranes between two cells at the site of protein plaques forming strong linkage between the two cells.Diff: 5 Page Ref: 246) These junctions are found in epithelial tissue where they prevent paracellular movement of molecules.Diff: 5 Page Ref: 237) These junctions allow the passage of small molecules and ions from the cytosol of one cell to that of a neighboring cell.
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