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Ribosomes and Translation

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Questions and Answers

Which of the following is responsible for the recognition and degradation of polyubiquitinated proteins?

Lysosome

Proteolytic cleavage

Proteasome (correct)

Protein caps

Which of the following covalent modifications is involved in the targeting of proteins to membranes?

Phosphorylation

Disulfide bond formation

Farnesylation (correct)

Glycosylation

Which type of phosphorylation has the most important effects on proteins?

Serine phosphorylation

Tyrosine phosphorylation (correct)

Threonine phosphorylation

All three have equal effects

Which of the following correctly describes the process of translation in protein synthesis?

The sequence of bases in mRNA determines the sequence of amino acids in the translated protein (B) Signup and view all the answers

What are the basic requirements for translation to occur?

Template RNA, ribosome, and aminoacyl-tRNA (B) Signup and view all the answers

What is the function of the genetic code?

To determine the sequence of amino acids in proteins (D) Signup and view all the answers

Which of the following is NOT a component of the ribosome?

mRNA (C) Signup and view all the answers

What is the function of the A site in the ribosome?

Binds incoming aminoacyl tRNA (A) Signup and view all the answers

Which of the following is NOT required for the initiation of translation?

ATP (B) Signup and view all the answers

What occurs during the termination of translation?

Recognition of the stop codon (C) Signup and view all the answers

Which of the following is true about the genetic code?

The genetic code is read from a fixed starting point. (A) Signup and view all the answers

What is the function of transfer RNA (tRNA)?

To act as an adaptor molecule in protein synthesis. (C) Signup and view all the answers

What is the significance of the 'wobble' position in a codon?

It allows flexibility and efficiency in the use of tRNA. (C) Signup and view all the answers

What is the role of ribosomes in protein synthesis?

To serve as the factories for protein synthesis. (C) Signup and view all the answers