CAMPBELL BIOLOGY >CUSTOM<
14th Edition
ISBN: 9781269868235
Author: Reece
Publisher: PEARSON C
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Chapter 17, Problem 2TYU
Which of the following is not true of a codon?
(A) It may code for the same amino acid as another codon.
(B) It never codes for more than one amino acid.
(C) It extends from one end of a tRNA molecule.
(D) It is the basic unit of the genetic code.
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which statement about genetic code is not true?
A) mRNA is read 3 bases at a time, which are called codons. B) There is one initiator codon that codes for an amino acid. C) Each amino acid is coded for by only one codon. D) There are 3 termination codons that do not code for amino acids. E) Each codon is specific for only one amino acid.
An anion has an equilibrium potential of -40 mV. What direction are the chemical and electrical forces acting on the anion at the resting membrane potential (-70 mV)?
A) Both the chemical and electrical forces are directed out of the cell. B) The chemical force is directed out of the cell and the electrical force is directed into the cell. C) The chemical force is directed into the cell and the electrical force is directed out of the cell. D) There is insufficient information to answer this question. E) Both the chemical and electrical forces are directed into the cell.
Which of the following best describes a stop codon?
A) They are codons that indicate termination of
protein synthesis.
B) They are codons that are extra in the
genetic code and are not used.
C) They are codons that indicate when to
create new peptide bonds.
D) They are codons that signal when the RNA
strand is done being read.
E) They are codons that indicate when to
begin folding the polypeptide.
Which of the following is an example of the degeneracy of the genetic code?Group of answer choices
a) each codon specifies more than one amino acid
b) the genetic code is not degenerate
c) an amino acid can have more than one codon
d) None of the above
Chapter 17 Solutions
CAMPBELL BIOLOGY >CUSTOM<
Ch. 17.1 - Prob. 1CCCh. 17.1 - What polypeptide product would you expect from a...Ch. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.2 - MAKE CONNECTIONS In a research artide about...Ch. 17.2 - What enables RNA polymerase to start transcribing...Ch. 17.2 - Prob. 3CCCh. 17.3 - Prob. 1CCCh. 17.3 - How is RNA splicing similar to how you would watch...Ch. 17.3 - Prob. 3CC
Ch. 17.4 - What two processes ensure that the correct amino...Ch. 17.4 - Prob. 2CCCh. 17.4 - Prob. 3CCCh. 17.4 - Prob. 4CCCh. 17.4 - WH AT IF? In eukaryotic cells, mRNAs have been...Ch. 17.5 - What happens when one nucleotide pair is lost from...Ch. 17.5 - MAKE CONNECTIONS Individuals heterozygous for the...Ch. 17.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 17 - Describe the process of gene expression, by which...Ch. 17 - What are the similarities and differences in the...Ch. 17 - What function do the 5' cap and the poly-A tail...Ch. 17 - Prob. 17.4CRCh. 17 - What will be the results of chemically modifying...Ch. 17 - In eukaryotic cells, transcription cannot begin...Ch. 17 - Which of the following is not true of a codon? (A)...Ch. 17 - The anticodon of a particular tRNA molecule is (A)...Ch. 17 - Which of the following is not true of RNA...Ch. 17 - Which component is not directly involved in...Ch. 17 - Using Figure 17.6, identify a 5' 3' sequence of...Ch. 17 - Prob. 7TYUCh. 17 - Would the coupling of the processes shown in...Ch. 17 - Prob. 9TYUCh. 17 - Prob. 10TYUCh. 17 - Prob. 11TYUCh. 17 - Prob. 12TYUCh. 17 - Prob. 13TYU
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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
- Once translated into proteins: (a) How many nucleotides are there? (b) How many codons are there? (c) How many amino acids?arrow_forwardA DNA strand consists of any sequence of four kinds of nucleotides. Suppose there were only 14 different amino acids instead of 20. Which of the following statements would be correct descriptions of the minimal number of nucleotides necessary to create a genetic code? a) 1 b)2, provided that chain termination does not require a special codon c) 3, provided that chain termination does require a special codon d)2, no matter how chain termination is accomplished e) Both b and carrow_forward3)Which of the following statements are true? Choose all that apply a)There are multiple codons possible for nearly all amino acids b)Each stop codon also codes for an amino acid c)Each tRNA will base pair with only one codon d)The start codon also codes for an amino acid e)Each codon in mRNA codes for exactly one amino acid f)Each codon in tRNA codes for exactly one amino acid g)Each anticodon in tRNA pairs with exactly one codon h)Each tRNA carries exactly one type of amino acidarrow_forward
- Which of the following is NOT true regarding the genetic code and translation? a) An mRNA is typically translated in only 1 reading frame. b) There are 64 different codons. c) Multiple amino acids may be coded for by a single codon. d) mRNA sequence is the reverse complement of the template strand of DNA.arrow_forwardThe anticodon of a particular tRNA molecule is(A) complementary to the corresponding mRNA codon.(B) complementary to the corresponding triplet in rRNA.(C) the part of tRNA that bonds to a specific amino acid.(D) catalytic, making the tRNA a ribozyme.arrow_forwardWhich is/are NOT true of protein isoforms? They are related in structure and function. B) They have identical base sequence. (c) they are the result of alternative splicing They have variable amino acid sequencearrow_forward
- A section of the mRNA has a nucleotide sequence of CUATAUGUTGU. How many codons does this segment of mRNA represent? a) two, b) one, c) four, d) three, e) none, this molecule is not a transcript of DNAarrow_forwardWhich of the following codons is not a termination codon for protein synthesis?a) UUUb) UAGc) UAAd) UGAarrow_forward6a) Transcribe the following DNA sequence into codons. TACGCGACATTACATGAATCGTTTGGAGATTAGCCCTATTTCTCTAAGAACACGACTb) Excise(cut out) codons numbered 5, 6, and 7. Leave the remaining codons. c) Now translate the sequence . d) Explain how many amino acids are now in your polypeptide? e) What would happen to your polypeptide if either of your cysteine amino acids near the start or end of thepolypeptide were translated incorrectly. f) Based on your final polypeptide can you make the original DNA strand by doing reverse translation andtranscription? g) Explain if your polypeptide similar to your template strand or the complementary strand?arrow_forward
- Suppose that a gene underwent a mutation that changed a GAA codon to UAA. (a) Name the amino acid encoded by the original triplet. (b) Identify a tRNA anticodon that could translate the nonsense UAA triplet. (c) What other amino acid could be encoded by the mutant tRNA?arrow_forwardIf a protein is made up of 1000 amino acids 1) How many nucleotides will its mRNA contain between (and including) the start and stop codon? _____ 2) How many codons will this mRNA contain? _____ 3) How many tRNA molecules will be needed to make that protein? _____arrow_forwardWhen the ribosome "reads" the codon UAG, UGA or UAA... A) the polypeptide is released from ribosome but ribosome continues reading the mRNA B) the proper tRNA enters the ribosome C) translation begins D) polypeptide is released from the ribosome and translation endsarrow_forward
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