Bio 311C- Sata Final Exam Review Questions, all
Solved 100% Correct with Verified Answers
Which of the following is / are important for enforcing the specificity of protein synthesis?
A) Correct tRNA being attached to the right amino acid
B) Correct codon matching the right anticodon
C) Specific mRNA finding the right kind of ribosome
D) Both A and B are needed
E) All A, B and C are essential - ✔✔D
Choose the answer that has these events of protein synthesis in the proper sequence. Note that
all the steps in translation may NOT be included.
1. A peptide bond forms between the new amino acid and a polypeptide chain.
2. An aminoacyl-tRNA binds to the A site.
3. Empty tRNA leaves the P site, moves to the E site and leaves the ribosome.
4. A small ribosomal subunit binds with mRNA at the recognition site.
5. peptidyl tRNA translocates to the P site from A site.
A) 4, 1, 3, 2, 5
B) 1, 3, 2, 4, 5
C) 2, 4, 5, 1, 3
D) 5, 4, 3, 2, 1
E) 4, 2, 1, 3, 5 - ✔✔E
During translation initiation the P-site is first bound by __________.
A) Methionine-tRNA
B) large ribosomal subunit
C) initiation factor
D) small ribosomal subunit
, E) GTP - ✔✔A
Which of the following is NOT involved in the elongation of a polypeptide duringtranslation?
A) mRNA
B) peptide tRNA
C) Amino acyl tRNA
D) Elongation factor
E) initiation factor - ✔✔E
Which of the following statement summarizes the relationship between operon and genes?
A) An operon contains a few genes, repressor and an operator.
B) A gene contains hundreds of operons, which are composed of DNA.
C) An operon contains hundreds of genes, which are composed of DNA. D) A gene is made of
operon, promoter, operator, a few genes and a repressor.
E) An operon consists of promoter, operator and a few genes made of DNA - ✔✔E
The role of a metabolite (a product of metabolism) that controls a repressible operon is to
A) bind to the repressor protein and inactivate it.
B) bind to the operator region and block the attachment of RNA polymerase to the promoter.
C) bind to the promoter region and decrease RNA polymerase binding to the promoter.
D) bind to the repressor protein and activate it to block transcription.
E) increase the production of inactive repressor proteins. - ✔✔D
Which of the following is an example of inducible regulation of gene expression?
A) DNA polymerase makes RNA only when needed to make a protein.
B) Specific mRNA is degraded as soon as protein is made.
C) Protein is made when there is no lactose to be broken down.
Solved 100% Correct with Verified Answers
Which of the following is / are important for enforcing the specificity of protein synthesis?
A) Correct tRNA being attached to the right amino acid
B) Correct codon matching the right anticodon
C) Specific mRNA finding the right kind of ribosome
D) Both A and B are needed
E) All A, B and C are essential - ✔✔D
Choose the answer that has these events of protein synthesis in the proper sequence. Note that
all the steps in translation may NOT be included.
1. A peptide bond forms between the new amino acid and a polypeptide chain.
2. An aminoacyl-tRNA binds to the A site.
3. Empty tRNA leaves the P site, moves to the E site and leaves the ribosome.
4. A small ribosomal subunit binds with mRNA at the recognition site.
5. peptidyl tRNA translocates to the P site from A site.
A) 4, 1, 3, 2, 5
B) 1, 3, 2, 4, 5
C) 2, 4, 5, 1, 3
D) 5, 4, 3, 2, 1
E) 4, 2, 1, 3, 5 - ✔✔E
During translation initiation the P-site is first bound by __________.
A) Methionine-tRNA
B) large ribosomal subunit
C) initiation factor
D) small ribosomal subunit
, E) GTP - ✔✔A
Which of the following is NOT involved in the elongation of a polypeptide duringtranslation?
A) mRNA
B) peptide tRNA
C) Amino acyl tRNA
D) Elongation factor
E) initiation factor - ✔✔E
Which of the following statement summarizes the relationship between operon and genes?
A) An operon contains a few genes, repressor and an operator.
B) A gene contains hundreds of operons, which are composed of DNA.
C) An operon contains hundreds of genes, which are composed of DNA. D) A gene is made of
operon, promoter, operator, a few genes and a repressor.
E) An operon consists of promoter, operator and a few genes made of DNA - ✔✔E
The role of a metabolite (a product of metabolism) that controls a repressible operon is to
A) bind to the repressor protein and inactivate it.
B) bind to the operator region and block the attachment of RNA polymerase to the promoter.
C) bind to the promoter region and decrease RNA polymerase binding to the promoter.
D) bind to the repressor protein and activate it to block transcription.
E) increase the production of inactive repressor proteins. - ✔✔D
Which of the following is an example of inducible regulation of gene expression?
A) DNA polymerase makes RNA only when needed to make a protein.
B) Specific mRNA is degraded as soon as protein is made.
C) Protein is made when there is no lactose to be broken down.
