When Khorana translated a repeating dinucleotide (such as UCUCUC...) he concluded that the genetic code must...
When Khorana translated a repeating dinucleotide (such as UCUCUC...) he concluded that the genetic code must have an odd number of bases because he got
| a. |
only one homopolypeptide. |
b. |
two different homopolypeptides. |
c. |
three different homopolypeptides. |
d. |
only one peptide composed of two alternating amino acids (poly ser-leu, for instance). |
e. |
only one peptide composed of three alternating amino acids (poly ser-leu-arg, for instance). |
Homework Answers
Dr. Hargobind Khorana made use of repeating dinucleotides (such as UCUCUC...) to decipher the remaining codons. He obtained a single polypeptide chain consisting of two alternating amino acids, one for UCU and the other for CUC. On the basis of this he concluded that the genetic codon must have an odd number of bases.
Hence, the correct option is (D) only one peptide composed of two alternating amino acids (poly ser-leu, for instance).
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When Khorana translated a repeating dinucleotide (such as
UCUCUC...) he concluded that the genetic code must...
To crack the genetic code, researchers introduced synthetic messenger RNAs into in vitrotranslation systems and determined...
To crack the genetic code, researchers introduced synthetic messenger RNAs into in vitrotranslation systems and determined which proteins were produced from these synthetic mRNAs. mRNAs consisting of poly-UUC led to production of three different proteins: poly-Phe, poly-Ser, and poly-Leu. What best explains this result? A. Each amino acid is specified by several codons. B. Transcription started at three different places. C. The synthetic mRNA was read in all three reading frames. D. Each codon codes for several different amino acids.
What amino acid would the Manticodon code for RNA codon table 2nd position Tot position СТА...
What amino acid would the Manticodon code for RNA codon table 2nd position Tot position СТА Tyr Phe Phe > eu eu Oulaa Jooo 9999 stop stop eu eu eu Let 0 - puchbucobucusura BER < Val Val Asp Ala Asp Ala Glu Ala Glu Amino Acids Keu Pro Pro His Weu Leu Gin lle Pro Thr Thr Thr Thr Asn Asn lle Ser Ser Arg lle Met Lys Lys bucoucouco Arg > Asp Asp Val Val Val Val Ala...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters in the alphabet to encode 20 amino acids. DNA on the planet Arth only contains A, G and C. In addition, proteins on Arth are made from 26 different amino acids. What is the minimum number of nucleotides in a codon needed to code for life on Arth? Hint: In humans a 3-letter code can represent 4 x 4 x4 = 64 amino acids...
Question 24 (1 point) In regard to the components of the genetic code, a "codon" is...
Question 24 (1 point) In regard to the components of the genetic code, a "codon" is a a) polymeric molecule composed of nucleic acids. b) sequence of three nucleotides. c) phosphate group, a ribose sugar, and nitrogen. d) sequence of nucleotides that codes for a protein. Question 25 (1 point) Which one of the following statements concerning protein is not correct? a) Proteins are synthesized in the liver and by B-lymphocytes. b) Proteins are polymers of amino acids. c) An...
The following genomic DNA sequence comes from the first exon of a human gene and contains...
The following genomic DNA sequence comes from the first exon of a human gene and contains the 3'-end of the 5'-untranslated region and the start of a long open reading frame that codes for 200 amino acids (a.k.a. coding sequence). Note: There are no introns in this short portion and only one strand of the genomic DNA is shown. Which of the following answers lists the first three amino acids of the translated protein correctly? Seconed Position tyr ser leu...
An important validation of the genetic code occurred when George Streisinger determined the amino acid sequence of bacteriophage T4 lysozyme and of mutants induced by proflavin, a dye with a planar st...
An important validation of the genetic code occurred when George
Streisinger determined the amino acid sequence of bacteriophage T4
lysozyme and of mutants induced by proflavin, a dye with a planar
structure that can intercalate (fit) between successive base pairs
in DNA and induce frameshift mutations−that is, mutations involving
additions or deletions of a single base. Streisinger and colleagues
found that a particular single-base insertion mutation could be
suppressed, with wild-type function restored, by a mutation that
evidently involved a...
The earliest work on the genetic code established UUU, CCC, and AAA as the codons for Phe, Pro, and Lys, respectively. E...
The earliest work on the genetic code established UUU, CCC, and
AAA as the codons for Phe, Pro, and Lys, respectively.
Explain the reason why polyG was not used as a translation
template in these experiments.
Match the words in the left column to the appropriate blanks in
the sentences on the right.
RNA polymerase To establish codons for different amino acids Nirenberg and Matthaei polymerized is physically unstable molecules with the to synthesize polyN, a polyribonucleotide containing only one...
Namer A) alternating sugar and nitrogen bases liked by peptide bonds B) complimentary bases held ...
Namer A) alternating sugar and nitrogen bases liked by peptide bonds B) complimentary bases held together by hydrogen bonds 6) The backbone of a niacleic acid strand consists of: alternating sugar and phosphate groups linked by phosphate ester bonds D) alternating nitrogen bases and phosphate groups linked by amide bonds Q 7) 刁what amino acids are involved in the following tripeptide? NH-CH-C-NH-CH-- CH NH OH D) His-Lys-Phe A) Tyr-His-Lys C) Lys-His-Tyr B) Lys-His-Phe 8) Which list contains only neutral polar...
1. DNA replication is considered semiconservative because Group of answer choices it will create three new,...
1. DNA replication is considered semiconservative because Group of answer choices it will create three new, identical strands when finished. it never replicates in the 5 to 3 prime direction. it always replicates in the 3 to 5 prime direction. it uses the original strand as a template for replication. 2. Which is NOT true about the genetic code? Group of answer choices It produces 64 different possibilities of base sequences. It contains start and stop codons as instructions. It...
C++ Help Task B: Translation While a nucleotide is the basic unit of information, three nucleotid...
C++ Help
Task B: Translation
While
a nucleotide is the basic unit of information, three nucleotides,
or codon, is the basic unit of storage. The reason
for this is that each gene codes for a protein, and all proteins
are made from 20 amino acids. Recall that there are 4 different
bases that make up dna. Thus, three bases can encode for 4x4x4 = 64
different symbols. Two base pairs can only encode for 4x4 = 16
symbols, which is...
What amino acid would the Manticodon code for RNA codon table 2nd position Tot position СТА Tyr Phe Phe > eu eu Oulaa Jooo 9999 stop stop eu eu eu Let 0 - puchbucobucusura BER < Val Val Asp Ala Asp Ala Glu Ala Glu Amino Acids Keu Pro Pro His Weu Leu Gin lle Pro Thr Thr Thr Thr Asn Asn lle Ser Ser Arg lle Met Lys Lys bucoucouco Arg > Asp Asp Val Val Val Val Ala...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters in the alphabet to encode 20 amino acids. DNA on the planet Arth only contains A, G and C. In addition, proteins on Arth are made from 26 different amino acids. What is the minimum number of nucleotides in a codon needed to code for life on Arth? Hint: In humans a 3-letter code can represent 4 x 4 x4 = 64 amino acids...
Question 24 (1 point) In regard to the components of the genetic code, a "codon" is a a) polymeric molecule composed of nucleic acids. b) sequence of three nucleotides. c) phosphate group, a ribose sugar, and nitrogen. d) sequence of nucleotides that codes for a protein. Question 25 (1 point) Which one of the following statements concerning protein is not correct? a) Proteins are synthesized in the liver and by B-lymphocytes. b) Proteins are polymers of amino acids. c) An...
The following genomic DNA sequence comes from the first exon of a human gene and contains the 3'-end of the 5'-untranslated region and the start of a long open reading frame that codes for 200 amino acids (a.k.a. coding sequence). Note: There are no introns in this short portion and only one strand of the genomic DNA is shown. Which of the following answers lists the first three amino acids of the translated protein correctly? Seconed Position tyr ser leu...
An important validation of the genetic code occurred when George
Streisinger determined the amino acid sequence of bacteriophage T4
lysozyme and of mutants induced by proflavin, a dye with a planar
structure that can intercalate (fit) between successive base pairs
in DNA and induce frameshift mutations−that is, mutations involving
additions or deletions of a single base. Streisinger and colleagues
found that a particular single-base insertion mutation could be
suppressed, with wild-type function restored, by a mutation that
evidently involved a...
The earliest work on the genetic code established UUU, CCC, and
AAA as the codons for Phe, Pro, and Lys, respectively.
Explain the reason why polyG was not used as a translation
template in these experiments.
Match the words in the left column to the appropriate blanks in
the sentences on the right.
RNA polymerase To establish codons for different amino acids Nirenberg and Matthaei polymerized is physically unstable molecules with the to synthesize polyN, a polyribonucleotide containing only one...
Namer A) alternating sugar and nitrogen bases liked by peptide bonds B) complimentary bases held together by hydrogen bonds 6) The backbone of a niacleic acid strand consists of: alternating sugar and phosphate groups linked by phosphate ester bonds D) alternating nitrogen bases and phosphate groups linked by amide bonds Q 7) 刁what amino acids are involved in the following tripeptide? NH-CH-C-NH-CH-- CH NH OH D) His-Lys-Phe A) Tyr-His-Lys C) Lys-His-Tyr B) Lys-His-Phe 8) Which list contains only neutral polar...
C++ Help
Task B: Translation
While
a nucleotide is the basic unit of information, three nucleotides,
or codon, is the basic unit of storage. The reason
for this is that each gene codes for a protein, and all proteins
are made from 20 amino acids. Recall that there are 4 different
bases that make up dna. Thus, three bases can encode for 4x4x4 = 64
different symbols. Two base pairs can only encode for 4x4 = 16
symbols, which is...
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