Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 21, Problem 6SQ
Summary Introduction
Introduction: Anticodons are a set of 3
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________ are encoded by a nucleotide triplet codon.
a.
Amino acids
b.
Chromosomes
c.
RNA strands
A genetic code in which two bases encode a single amino acid is not adequate for protein synthesis. Give a reason why.
The portion in the tRNA that is complementary with the mRNA when the aminoacyl-tRNA reaches the A site of the ribosome is the ____________. (No points for incorrect spelling)
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- Through wobble, a single ____________________ can pair with more than one ____________________. a. codon, anticodon b. group of three nucleotides in DNA, codon in mRNA c. tRNA, amino acid d. anticodon, codonarrow_forwardThe codons in the genetic code are sequences of three bases. Explain why sequences of only two bases could not be used to code for the 20 different amino acids commonly found in proteins.arrow_forwardBelow is a segment of RNA, transcribed from a DNA sequence. Use the codonchart to help answer the questions below. 5’ AUG/CCU/ACG/GAC/UGG/CCU 3’ a. What polypeptide would be generated by this sequence? b. The RNA is mutated to: 5’ AUGCCCACGGACUGGCCU 3’. What type of mutationhas occurred? Show the new polypeptide chain. c. The RNA is mutated to: 5’ AUGCCUACGGACGGGCCU 3’. What type of mutationhas occurred? Show the new polypeptide chain. d. The RNA is mutated to: 5’ AUGCCUACGGACUGACCU 3’. What type of mutationhas occurred? Show the new polypeptide chain.arrow_forward
- 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 chart below shows that adenine-uracil-guanine (AUG) codes for the amino acid methionine, and cytosine-adenine-guanine (CAG) codes for glutamine in humans. What do those two codons code for in carrots? A. valine and aspartic acid B. isoleucine and histidine C. methionine and glutamine D. serine and glutamic acidarrow_forwardBriefly describe (two or three sentences) the role of tRNA in building a protein from mRNA.arrow_forward
- _______is/are removed from a new mRNA. a. Introns c. A poly-A tail b. Exons d. Amino acidsarrow_forwardA mutation that changes a C to a T causes a type of Ehlers-Danlos syndrome, forming a “stop” codon and resulting in shortened procollagen. Consult the genetic code and suggest one way that this can happen.arrow_forwardDefine the following terms: a. rRNA b. tRNA c. mRNA d. siRNA e. miRNAarrow_forward
- Degeneracy 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_forwardA particular tRNA is mutated so that the amino acid attachment cannot bind with the aminoacyl-tRNA synthase. What happens when an mRNA transcript contains the codon for this tRNA? A. The tRNA will not bind to this codon. B. Translation stops and the protein is released. C The wrong tRNA is added to the protein chain. D. Translation stops and the protein remains bound to the ribosome.arrow_forwardWhich of the following amino acids is carried by the tRNA that initiates translation in eukaryotes? A. Alanine B. Methionine C. Tryptophan D. Leucinearrow_forward
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