BIOLOGY 12E CONNECT ACCESS CARD
12th Edition
ISBN: 9781264938513
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 18, Problem 4U
An open reading frame (ORF) is distinguished by the presence of
a. a stop codon.
b. a start codon.
c. a sequence of DNA long enough to encode a protein.
d. All of the choices are correct.
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There are 61 mRNA codons that specify an amino acid, but only 45 tRNAs. This is best explained by the fact that
A. some tRNAs have anticodons that recognize two or more different codons.
B. the rules for base pairing between the third base of a codon and tRNA are flexible.
C. many codons are never used, so the tRNAs that recognize them are dispensable.
D. A and B only
E. A, B, and C
Which of the following statements are accurate descriptions of the genetic code? MARK ALL THAT APPLY
Select one or more:
a. The genetic code is made up of triplet nucleotides that specify an amino acid.
b. The genetic code is unambiguous because codons only specific a single amino acid.
C. The genetic code is read in an overlapping manner.
d. The genetic code is redundant because a single codon can specify more than one amino acid.
e. Some amino acids are encoded by more than one codon.
f. All codons of the genetic code specify amino acids.
The codon and anticodon are base-paired together during the process of translation. Which of the following is correct regarding the relationship between anticodon and codon?
A. The tRNA anticodon UCU pairs with the AGA mRNA codon.
B. The tRNA anticodon is read from the 5’ to the 3’ end.
C. A tRNA anticodon can pair with only one mRNA codon.
D. The mRNA codon ACG base pairs with the tRNA anticodon TGC.
Chapter 18 Solutions
BIOLOGY 12E CONNECT ACCESS CARD
Ch. 18.1 - Prob. 1LOCh. 18.1 - Describe the pros and cons of restriction mapping,...Ch. 18.1 - Prob. 3LOCh. 18.2 - Discriminate between dideoxy terminator sequencing...Ch. 18.2 - Prob. 2LOCh. 18.3 - Describe the findings of the Human Genome Project.Ch. 18.3 - Prob. 2LOCh. 18.3 - Prob. 3LOCh. 18.4 - Prob. 1LOCh. 18.4 - Prob. 2LO
Ch. 18.4 - Prob. 3LOCh. 18.5 - Prob. 1LOCh. 18.5 - Prob. 2LOCh. 18.5 - Prob. 3LOCh. 18.6 - Prob. 1LOCh. 18 - Prob. 1DACh. 18 - If the human genome contains approximately 3...Ch. 18 - Prob. 1IQCh. 18 - Prob. 2IQCh. 18 - Prob. 3IQCh. 18 - Prob. 4IQCh. 18 - Prob. 5IQCh. 18 - Prob. 6IQCh. 18 - A genetic map provides a. the sequence of the DNA...Ch. 18 - Prob. 2UCh. 18 - Approximately how many genes are there in the...Ch. 18 - An open reading frame (ORF) is distinguished by...Ch. 18 - What is a BLAST search? a. A mechanism for...Ch. 18 - Prob. 6UCh. 18 - Prob. 7UCh. 18 - Prob. 8UCh. 18 - Prob. 1ACh. 18 - Prob. 2ACh. 18 - Prob. 3ACh. 18 - Prob. 4ACh. 18 - What information can be obtained from a DNA...Ch. 18 - Prob. 6ACh. 18 - Prob. 7ACh. 18 - You are in the early stages of a genome-sequencing...Ch. 18 - Genomic research can be used to determine if an...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements are NOT true? A. Replication is the process of making DNA and takes place in the nucleus of prokaryotic cells. B. Translation produces a polypeptide that may require additional processing to become a functional protein C. Transcription starts at the promoter of eukaryotic cells and scans until reaches the start codon. D. Splicing results in exons being put together and introns being removedarrow_forwardThe degeneracy of the Genetic code is due to A. a 1 to 1 correlation between single amino acids and single nucleotides B. The fact that tRNAs can bind to mRNAs at the same time they transfer amino acids to a growing polypeptide chain C. The fact that there is only one start codon D. The fact that the code is non-overlapping E. The fact that more than one codon specifying an amino acid F. None of the abovearrow_forwardWhich of the following best describes the initiation of translation? A. The mRNA binds the large ribosomal subunit. The start codon is identified and an rRNA with methionine is bound to the start codon. B. The mRNA binds the small ribosomal subunit. The start codon is identified and the large subunit is recruited. C. The mRNA binds the small ribosomal subunit. The start codon is identified and a tRNA with methionine is bound to the start codon. D. The mRNA binds the small ribosomal subunit. The start codon is identified and the tRNA with methionine enters the A site.arrow_forward
- Which of the following would probably cause the most severe damage to a gene's expression and phenotype a. A missense mutation changing the first methionine codon to an arginine codon. b. A deletion of a base in the 455th codon of a 456-amino acid protein. c. Alteration of a UGG codon to a UGA codon at position 324 of a 324 amino acid protein. d. Mutation of a GUC codon (valine) to a GUU codon (valine).arrow_forwardDefine the following terms: a. open reading frame b. degenerate coding system c. nonoverlapping coding sequence d. codon e. anticodonarrow_forwardFor each of the following, identify the type of RNA involved (mRNA, rRNA, or tRNA). a. Transports the correct amino acid to the ribosome, using the information encoded in the mRNA. b. Is a major component of ribosomes. c. Specifies the order of amino acids in a protein, using a series of three-base codons, where different amino acids are specified by particular codons. d. Contains a three-base anticodon that pairs with a complementary codon revealed in the mRNA. e. Assists in making the bonds that link amino acids together to make a protein.arrow_forward
- Transfer RNAs : a. contain codon and carry corresponding amino acid b. contain anticodon that is complementary to the DNA and carry the corresponding amino acid c. contain codon that is complimentary to the anticodon and carry corresponding amino acid d. contain anticodon that is complimentary to the codon and carry corresponding amino acidarrow_forwardExamine the following base sequence – 5’ UGA 3’. It represents the anticodon region of a particular tRNA. Based on this knowledge you know that a. This tRNA would be used to stop translation. b. This tRNA would carry the amino acid Serine to the ribosome. c. This tRNA would carry the amino acid Threonine to the ribosome. d. This tRNA would bind a TCA codon on DNA. e. This tRNA would not carry any amino acid to the ribosome. f. This tRNA would carry the amino acid Leucine to the ribosome.arrow_forwardWhich eukaryotic RNA polymerase (RNA pol I,pol II, or pol III) transcribes which genes?a. tRNAsb. mRNAsc. rRNAsd. miRNAsarrow_forward
- Which of the following is an RNA processing event that increases the number of potential polypeptides that can be encoded by a single gene. a. transcription b. alternative splicing c. alternative transcription d. polyadenylationarrow_forwardWhich of the following statements about RNA processing in eukaryotes is INCORRECT? A. The excision of introns from pre-mRNA is the only modification required to produce a mature mRNA. B. A protein/RNA complex is used to remove introns from the pre-mRNA. C. A poly A tail is added on to the 3′ end of the mRNA. D. A 7-methylguanosine cap is added on to the 5′end of the mRNA. E. Modification occurs in the nucleus.arrow_forwardThe Kozak rules determine a. the choice of the start codon in complex eukaryotes. b. the choice of the start codon in bacteria. c. the site in the mRNA where translation ends. d. how fast the mRNA is translated.arrow_forward
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