12. Which enzyme forms peptide bonds between adjacent amino acids during polypep
ID: 255728 • Letter: 1
Question
12. Which enzyme forms peptide bonds between adjacent amino acids during polypeptide synthesis? a. RNA polymerase b. Phosphotransferase c. Ribonuclease d. Peptidyl transferase 13. A mutation that changes a codon sequence, and subs equenly changes the amino acid that should have been placed at that point in the polypeptide chain, is called a: a. Frameshift mutation b. Missense mutation C. Silent mutation d. Nonsense mutation 14. Which of these processes are coupled (linked) in prokaryotes but NOT in eukaryotes? a. Replication and transcription b. Transcription and translation c. Replication and translation d. Replication, transcription, and translation are not separate in prokaryotes A mutation that occurs when a base is inserted into or deleted from a DNA sequence, completely altering an entire amino acid sequence, is called a:Explanation / Answer
12) Which enzyme forms peptide bonds between adjacent amino acids during polypeptide synthesis?
ANSWER IS: peptidyl transferase
EXPLANATION:
Peptidyl transferase is an aminoacyltransferase that forms peptide bonds between adjacent amino acids by using tRNAs in protein translation process.
13) A mutation that changes a codon sequence, and subsequently changes the amino acid that should have been placed at that point in the polypeptide chain, is called a:
ANSWER IS: missense mutation
EXPLANATION:
A missense mutation is defined as point mutation in which single nucleotide change results in a different amino acid.
14) Which of these processes are coupled (linked) in prokaryotes but NOT in eukaryotes?
ANSWER IS : transcription and translation
EXPLANATION:
In prokaryotes, transcription and translation are coupled which means translation begins while transcription process still going on, this is because there is no nucleus to separate transcription and translation process.
15) A mutation that occurs when a base is inserted into or deleted from a DNA sequence, completely altering an entire amino acid sequence, is called a:
ANSWER IS: frameshift mutation
EXPLANATION :
Frameshift mutation caused by addition or deletion of a base pair that results in the shifts of the sequence to read.
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