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Questions and Answers
The sequence of amino acids in a protein is referred to as its primary structure.
The sequence of amino acids in a protein is referred to as its primary structure.
True (A)
Regardless of the amino acid to be bound to a tRNA molecule, all tRNA molecules use the same sequence at their 3' end to serve as the amino acid attachment site.
Regardless of the amino acid to be bound to a tRNA molecule, all tRNA molecules use the same sequence at their 3' end to serve as the amino acid attachment site.
True (A)
Which is a function of the signal-recognition particle (SRP)?
Which is a function of the signal-recognition particle (SRP)?
- The SRP direct proteins to the nuclear pores of the nuclear envelope.
- The SRP speeds up translation.
- The SRP binds to sugars added to proteins in the Golgi apparatus.
- The SRP binds to the SRP receptor on the rough endoplasmic reticulum. (correct)
Structurally and functionally related groups of proteins are referred to as:
Structurally and functionally related groups of proteins are referred to as:
Which one of the statements about translation in eukaryotes is correct?
Which one of the statements about translation in eukaryotes is correct?
Some enzymes are translated in the cytosol but remain inactive until they are phosphorylated by another enzyme, a kinase. Once they are phosphorylated, these enzymes become active. The phosphorylation of the enzyme would be considered a posttranslational modification.
Some enzymes are translated in the cytosol but remain inactive until they are phosphorylated by another enzyme, a kinase. Once they are phosphorylated, these enzymes become active. The phosphorylation of the enzyme would be considered a posttranslational modification.
There is approximately the same number of protein families as there are folding domains.
There is approximately the same number of protein families as there are folding domains.
The tRNA that binds the start codon has the sequence ______ at its ______.
The tRNA that binds the start codon has the sequence ______ at its ______.
Flashcards
Primary structure of a protein
Primary structure of a protein
The sequence of amino acids in a protein chain.
tRNA amino acid attachment site
tRNA amino acid attachment site
tRNA's 3' end, which carries the amino acid.
Signal-recognition particle (SRP) function
Signal-recognition particle (SRP) function
Binds to the signal sequence of proteins destined for the ER and targets them there.
Protein families definition
Protein families definition
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Eukaryotic translation initiation
Eukaryotic translation initiation
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Post-translational modification (phosphorylation)
Post-translational modification (phosphorylation)
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Protein families vs. folding domains
Protein families vs. folding domains
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Start codon tRNA sequence
Start codon tRNA sequence
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Primary structure of a protein correct?
Primary structure of a protein correct?
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Same tRNA for all amino acids?
Same tRNA for all amino acids?
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SRP function (multiple choice)
SRP function (multiple choice)
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Eukaryotic translation mRNA
Eukaryotic translation mRNA
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Correct translation termination
Correct translation termination
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Study Notes
Biology 1050 Final Exam Study Notes
- Primary Protein Structure: The sequence of amino acids.
- tRNA Amino Acid Attachment Site: All tRNA molecules use the same 3' end for amino acid attachment, regardless of the amino acid.
- Signal-Recognition Particle (SRP) Function: The SRP binds to the SRP receptor on the rough endoplasmic reticulum, directing proteins there.
- Structurally and Functionally Related Proteins: Called protein families or domains.
- Eukaryotic Translation: The initiation complex recognizes the 5' cap and scans for the first AUG triplet. Translation continues until the ribosome reaches the end of the mRNA.
- Post-Translational Modification: Phosphorylation of an enzyme by a kinase is a post-translational modification.
- Protein Families and Folding Domains: There is approximately the same number of protein families as there are folding domains.
- Start Codon tRNA Sequence: The tRNA that binds the start codon (AUG) has the sequence 5'-AUG-3' which is the anticodon.
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Description
Prepare for your Biology 1050 final exam with this comprehensive study guide. Cover essential topics such as protein structure, translation, and post-translational modifications. Review key concepts including the functions of tRNA and signal-recognition particles to ensure a solid understanding of molecular biology.
