BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
2020th Edition
ISBN: 9780135686553
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 3FTB
The genetic code uses______ (how many?) bases to code for a single amino acid. This sequence of bases in mRNA is called a(n)_____.
The complementary sequence of bases in tRNA is called a(n)____.
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Students have asked these similar questions
What term is used to describe the sequence on the tRNA that is complementary to mRNA?
Complementary sequence
Codon
Anti-codon
Anti-anticodon
In translation of an mRNA into a protein, the first amino acid that is attached to the start codon is which of the following?
a. O-formylmethionine
b. Serine
c. N-formylmethione
d. Cysteine
Why is DNA and not any other macromolecule represents the genetic code?
Chapter 13 Solutions
BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
Ch. 13 - 1. The molecule that carries the genetic...Ch. 13 - 2. Which of the following is not true of...Ch. 13 - 3. A stop codon
a. signals the end of protein...Ch. 13 - Prob. 4MCCh. 13 - Epigenetic modification of gene expression a....Ch. 13 - Prob. 1FTBCh. 13 - The three types of RNA that are essential for...Ch. 13 - 3. The genetic code uses______ (how many?) bases...Ch. 13 - The enzyme_______ synthesizes RNA from the...Ch. 13 - Prob. 5FTB
Ch. 13 - Prob. 6FTBCh. 13 - How does RNA differ from DNA?Ch. 13 - Prob. 2RQCh. 13 - Define the following terms: genetic code, codon,...Ch. 13 - 4. How is mRNA formed from a eukaryotic gene?
Ch. 13 - 5. Diagram and describe protein synthesis.
Ch. 13 - 6. Explain how complementary base pairing is...Ch. 13 - 7. Describe the principal mechanisms of regulating...Ch. 13 - Define mutation. Describe four different effects...Ch. 13 - Many years ago, some researchers reported that...Ch. 13 - Prob. 2AC
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- A certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).arrow_forwardIf the genetic code uses triplets, how many different amino acids can be coded by a repeating RNA polymer composed of UA and UC (UAUCUAUCUAUC ...)? a. one b. two c. three d. four e. fivearrow_forwardIn which of the following would you find the start codon sequence of a gene? mRNA DNA and mRNA mRNA and protein DNA, mRNA and protein Proteinarrow_forward
- 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.arrow_forwardWhich of the following steps in protein synthesis does not require a direct supply of energy? a. proofreading step by certain aminoacyl-tRNA synthetases b. translocation of mRNA in a ribosome c. linkage of an amino acid to its cognate tRNA d. alignment of a tRNA anticodon with an mRNA codonarrow_forwardIn the genetic code, there are ___ More tRNAs than codons More codons than amino acids The same number of codons and amino acids Multiple start codonsarrow_forward
- 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.arrow_forwardAn mRNA molecule codifies only one type of protein?arrow_forwardThe first nucleotide in every mRNA molecule ever produced is _________ and the first amino acid of every amino acid chain ever produced is ________ a. guanine; alanine b. uracil; lysine c. cytosine; threonine d. adenine; methioninearrow_forward
- Describe the process of protein synthesis and localize where each step takes place. Make sure to describe and use the following terms: Translation: mRNA to proteins (cytoplasm) mRNA w/codon, ribosomes, tRNA w/anticodon and amino acid, protein with 3D structurearrow_forwardWhich RNA types are involved in translation? A. mRNA, tRNA, siRNA B. siRNA, tRNA, rRNA C. tRNA, rRNA, mRNA D. rRNA, siRNA, tRNAarrow_forwardWhat is genetic code? How many codons are there? Justify that genetic code is universalarrow_forward
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