Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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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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Students have asked these similar questions
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
A codon is: a. An alternative name for gene b. Three amino acids that encode a nucleotide c. Three nucleotides that encode an amino acid d. One of three nucleotides that encode and amino acid
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.
Chapter 18 Solutions
Biology
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 describes the interactions between a codon and an anticodon? A. A codon and an anticodon become covalently bonded together due to the activity of the ribosome. B. A codon and anticodon do not come into direct contact because codons are in the nucleus but anticodons are in the cytoplasm. C. A codon and anticodon are attracted to each other due to hydrogen bonding. D. A codon and an anticodon are linked together by an amino acid. ..arrow_forwardThe 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.arrow_forwardA codon is a. one of three nucleotides that encode an amino acid. b. three nucleotides that encode an amino acid. c. three amino acids that encode a nucleotide. d. one of four bases in DNAarrow_forward
- Which of the following is true about the genetic code? A. A codon is three to six bases long. B. Each amino acid is specified by only one codon. C. The codon signaling the end of transcription also codes for an amino acid. D. There are multple codons signaling the start of transcription. E. All organisms use essentially the same genetic code.arrow_forwardWhich 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 codons CCU, CCC, CCA, and CCG all code for the amino acid threonine. This is because the genetic code is a,b,c,d, or e? a. generic b. faulty c. reducible d. redundant e. All of the answers are correctarrow_forward
- The 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_forwardEukaryotic mRNA is capped at the 5' end by: a. adding a poly A sequence to the 5' end. b. ligating a 7-methylguanylate via a 3’ linkage. c. methylating the base pairs near the 5’ end. d. forming a lariat structure via transesterification.arrow_forward
- In the genetic code, one codon a. consists of three bases. b. specifies a single amino acid. c. specifies more than one amino acid. d. Both a and b are correct.arrow_forwardThe enzyme Aminoacyl tRNA synthetase a. is very specific, recognizes only amino acids b. adds amino acids to the tRNA anticodon c. is very specific, there is only one enzyme per cell d. is very specific, recognizes only one amino acidarrow_forwardDegeneracy of the genetic code denotes the existence of which of the following? A. codons that can wobble at the 5' position B. multiple codons for a single amino acid C. codons consisting of only two bases D. base triplets that do not code for any amino acid E. codons that are not overlappingarrow_forward
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