Homework Answers
Ans: Correct option: Signal peptide on the N terminus of the polypeptide
Explanation: After synthesis, protein is first targeted to the endoplasmic reticulum. To target the protein into the endoplasmic reticulum a signal is required which is called targeting signal. This signal is located on the N-terminus and made up of the hydrophobic amino acid sequence and some basic amino acids.
Incorrect options:
an ER bound ribosome
Explanation: when the protein that is synthesized by the ribosome has an ER specific signal sequence then the ribosome bind to the endoplasmic reticulum. Ribosome synthesizes proteins and they have no role in protein targeting to the endomembrane system.
Chaperon protein:
Explanation: These proteins help in the proper folding of the protein. They are required for protein targeting.
Signal peptide on the C-terminus of the polypeptide
Explanation: Signal peptide is present on the N-terminus and not on the C-terminus.
Signal recognition particle
Explanation:
- As soon as the signal sequence comes out from the ribosome the signal recognition particle recognizes the signal sequence.
- Then translation is temporarily stopped until the ribosome attaches to the SRP receptor (signal recognition particle receptor) present on the endoplasmic reticulum.
- Now binding of GTP cause the transfer of signal sequence to the translocon and GTP hydrolysis cause the dissociation of the signal recognition particle.
Ans: Correct Answer: aminoacyl t-RNA synthetase will lose control over the amino acid
Explanation: Aminoacyl t-RNA synthetase is the enzyme that is responsible for the charging of the tRNA. That is the addition of the proper amino acid on to the t-RNA according to the anticodon present on the t-RNA. This enzyme will not work properly upon chemical modification of the tRNA as per the above-mentioned way.
Incorrect options:
Anticodon will match with the modified amino acid it carries
Explanation: As the t-RNA is chemically modified in such a way that amino acid is not as per the information provided by anticodon.
Anticodon will lose their specificity for t-RNA
Explanation:
Anticodons are the sequences present in the tRNA that binds to the specific codons that are present on the mRNA.
The anticodon will match the codon on the mRNA
Explanation: As the t-RNA is chemically modified and the amino acid is not according to the anticodon information. This will cause the braking of the aminoacyl t-RNA bond.
Ans:6 Correct option is the last one
5' AUGGUCGGUUAUUAAGCA 3'
AUG codes for methionine symbol M
GUC codes for valine symbol V
GGU codes for Glycine symbol G
UAU codes for tyrosine symbol Y
UAA is a stop codon
coding strand is the strand that has a similar sequence to the mRNA only there will uracil in place of thymine. The mRNA sequence is in the 5' to 3' direction.
The second option is incorrect because in RNA thymine is not present.
The third option is incorrect because GGU codes for glycine not for cytosine
last is incorrect because the mRNA is in 5' to 3' direction not in 3' to 5'
Add Answer to:
Question 2 (1 point) In order to target a protein to the endomembrane system, which of...
Place the following steps of TRANSLATION in the correct order for EUKARYOTES. The ribosome reaches a...
Place the following steps of TRANSLATION in the correct order for EUKARYOTES. The ribosome reaches a stop codon. A release factor binds and causes the release of the new polypeptide, along with the mRNA. The ribosome dissociates. v Acharged tRNA with a matching anticodon binds the mRNA codon in the A site. ✓ The ribosome moves exactly 3 nucleotides toward the 3* end of the mRNA. The small ribosomal subunit uses rRNA to bind to the Kozak sequence, which places...
There are 20 different tRNA molecules, one for each of the 20 amino acids found in protein
There are 20 different tRNA molecules, one for each of the 20 amino acids found in protein. During protein synthesis, the job of a tRNA molecule is to carry its particular amino acid to the growing protein chain and find the correct amino acid position there. It does this by matching a 3- letter anticodon on the tRNA to a complementary 3-letter codon on mRNA. Below, in a diagram of a ERNA molecule, nucleotides are represented by small circles, some...
For Questions 8-13, match the term with its definition. A. polypeptide B. genetic code C. codon...
For Questions 8-13, match the term with its definition. A. polypeptide B. genetic code C. codon D. translation _8. The sequence of bases that serves as the language of life _9. A sequence of 3 bases on a tRNA molecule that is complementary to sequences of bases on an mRNA molecule. 10. How genetic information is put into action in a I living cell 11. The decoding of an mRNA into a protein 12. A chain of amino acids 13....
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to...
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to the 3' end of the mRNA molecule? A. Peptide bond B.5 phosphate group C.3" hydroxyl group D. Amino (N-terminus) E. Carboxyl (C-terminus) QUESTION 14 Which of the following is true regarding pre-mRNA modifications/processing? O A. Alternative splicing allows for increased complexity and synthesis of protein isomers OB. The 5' cap is added after RNA polymerase dissociates from the gene OC. The poly A tail...
Table 1B: Protein Synthesis with 2nd DNA Template Strand DNA Codons in the 2nd Template Strand...
Table 1B: Protein Synthesis with 2nd DNA Template Strand DNA Codons in the 2nd Template Strand mRNA Sequence (List codons) Amino Acids in the Protein **Use the Genetic Code Chart on page 217 to determine the amino acids that will be placed in the protein Questions: 19. The three letter "code words of DNA and RNA that specify amino acids are called: A. codons B. promoters C. Introns D. anticodons 20. Proteins are composed of building blocks called: A. fatty...
for part 1 and 2 answers are either A,E, or P site for the next 2...
for part 1 and 2 answers are either A,E, or P site for the next
2 its codon/anticodon and then gtp hydrolysis/peptide bond
formation, then last one is eithe A/E/P
During the process of translation elongation, the tRNA bound to the polypeptide chain is bound in the ribosome at the [Select] . and the tRNA carrying the next amino acid enters at the [Select] . If the [Select] on the tRNA matches the [ Select ] on the mRNA, the...
Questionz 1 pts Put the steps of polypeptide chain elongation and termination in order (after the...
Questionz 1 pts Put the steps of polypeptide chain elongation and termination in order (after the initiation camnla bac formad [Choose ] Peptide bond formation between the polypeptide chain on the tRNA in the P site and the amino acid on the tRNA Translocation (the ribosome moves one codon toward the 3' end of the mRNA with the help of an elongation Step One ✓ The appropriate incoming aminoacyl-tRNA binds to an elongation factor bound to GTP The GTP is...
Question 9: The genetic code is read in groups of three nucleotides, called codons, in mRNA...
Question 9:
The genetic code is read in groups of three nucleotides, called
codons, in mRNA that specifies for a particular amino acid.
tRNA molecules act as the amino acid carriers that by correctly
pairing with the codon on mRNA can deliver the correct amino acid
to the ribosome during translation. At the tip of each tRNA
molecule is a group of three nucleotides called an anticodon and at
the other end is where the corresponding amino acid is attached...
How are the correct amino acids brought to the rib... How are the corect amino acids...
How are the correct amino acids brought to the rib... How are the corect amino acids brought to the ribosomes for protein synthesis? The amino acids are synthesized directly at the ribosomes by the hydrolysis of dietary protein. OAmino acids are carried in the interior of the DNA double helix, then carried to the ribosomes. OAcetyl-CoA carries the amino acids that match the codon on DNA. O Transfer RNA molecules, whose anticodon loop contains the complementary sequence of an MRNA...
15. Translation (RNA protein) has three main stages: initiation, elongation, and termination. a. Initiation occurs when...
15. Translation (RNA protein) has three main stages: initiation, elongation, and termination. a. Initiation occurs when the small ___________________ subunit binds to the ____ end of mRNA and is then joined by the large _________________ subunit (which has three sites called the A, P, and E sites). Once the complex is formed, the _______________ begins to read the mRNA in a ____ to ____ direction. When it reaches the first start codon (_________) a tRNA carrying the amino acid ______________________...
Place the following steps of TRANSLATION in the correct order for EUKARYOTES. The ribosome reaches a stop codon. A release factor binds and causes the release of the new polypeptide, along with the mRNA. The ribosome dissociates. v Acharged tRNA with a matching anticodon binds the mRNA codon in the A site. ✓ The ribosome moves exactly 3 nucleotides toward the 3* end of the mRNA. The small ribosomal subunit uses rRNA to bind to the Kozak sequence, which places...
For Questions 8-13, match the term with its definition. A. polypeptide B. genetic code C. codon D. translation _8. The sequence of bases that serves as the language of life _9. A sequence of 3 bases on a tRNA molecule that is complementary to sequences of bases on an mRNA molecule. 10. How genetic information is put into action in a I living cell 11. The decoding of an mRNA into a protein 12. A chain of amino acids 13....
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to the 3' end of the mRNA molecule? A. Peptide bond B.5 phosphate group C.3" hydroxyl group D. Amino (N-terminus) E. Carboxyl (C-terminus) QUESTION 14 Which of the following is true regarding pre-mRNA modifications/processing? O A. Alternative splicing allows for increased complexity and synthesis of protein isomers OB. The 5' cap is added after RNA polymerase dissociates from the gene OC. The poly A tail...
Table 1B: Protein Synthesis with 2nd DNA Template Strand DNA Codons in the 2nd Template Strand mRNA Sequence (List codons) Amino Acids in the Protein **Use the Genetic Code Chart on page 217 to determine the amino acids that will be placed in the protein Questions: 19. The three letter "code words of DNA and RNA that specify amino acids are called: A. codons B. promoters C. Introns D. anticodons 20. Proteins are composed of building blocks called: A. fatty...
for part 1 and 2 answers are either A,E, or P site for the next
2 its codon/anticodon and then gtp hydrolysis/peptide bond
formation, then last one is eithe A/E/P
During the process of translation elongation, the tRNA bound to the polypeptide chain is bound in the ribosome at the [Select] . and the tRNA carrying the next amino acid enters at the [Select] . If the [Select] on the tRNA matches the [ Select ] on the mRNA, the...
Questionz 1 pts Put the steps of polypeptide chain elongation and termination in order (after the initiation camnla bac formad [Choose ] Peptide bond formation between the polypeptide chain on the tRNA in the P site and the amino acid on the tRNA Translocation (the ribosome moves one codon toward the 3' end of the mRNA with the help of an elongation Step One ✓ The appropriate incoming aminoacyl-tRNA binds to an elongation factor bound to GTP The GTP is...
Question 9:
The genetic code is read in groups of three nucleotides, called
codons, in mRNA that specifies for a particular amino acid.
tRNA molecules act as the amino acid carriers that by correctly
pairing with the codon on mRNA can deliver the correct amino acid
to the ribosome during translation. At the tip of each tRNA
molecule is a group of three nucleotides called an anticodon and at
the other end is where the corresponding amino acid is attached...
How are the correct amino acids brought to the rib... How are the corect amino acids brought to the ribosomes for protein synthesis? The amino acids are synthesized directly at the ribosomes by the hydrolysis of dietary protein. OAmino acids are carried in the interior of the DNA double helix, then carried to the ribosomes. OAcetyl-CoA carries the amino acids that match the codon on DNA. O Transfer RNA molecules, whose anticodon loop contains the complementary sequence of an MRNA...
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