Test Bank for Genetics Essentials: Concepts and Connections, 3rd Edition

Strengthen your understanding with Test Bank for Genetics Essentials: Concepts and Connections, 3rd Edition, packed with challenging questions and expert solutions.

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Page 11. Which of the following statements CORRECTLY describes the facts about introns andexons?A)The number of introns is always less than the number of exons in a gene.B)Introns are degraded in the cytoplasm.C)All eukaryotic genes contain an intron.D)Mitochondrial and chloroplast genes do not contain introns.E)Introns do not contain sequence-specific information.2. In 1958, Francis Crick proposed that genes and their corresponding polypeptides are“colinear.” Which of the following statements concerning the concept of colinearity isINCORRECT?A)Colinearity means that the linear nucleotide sequence of a given gene correspondsdirectly to the linear amino acid sequence in the corresponding polypeptide.B)The number of nucleotides in a gene should be precisely proportional to thenumber of amino acids present in the corresponding polypeptide.C)Colinearity generally holds true for the coding regions of prokaryotic viral genes.D)The vast majority of eukaryotic genes follow the concept of colinearity.E)The exception to colinearity between genes and polypeptides is the presence ofuntranslated sequences (UTRs).3. How many introns are present on a gene that consists of four exons?A)twoB)threeC)fourD)fiveE)The number cannot be determined from the information provided.4. Which of the following statements regarding gene structure is TRUE?A)The amino acid sequence of a polypeptide can be precisely predicted by thenucleotide sequence of the gene that encodes it.B)The number of introns found in organisms is species specific.C)The number of exons and introns generally correlates to the complexity of theorganisms.D)Intron cleavage and exon splicing are both mediated exclusively by proteinenzymes.E)The number of exons is always less than the number of introns in a gene.

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