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Examen

MMSC490 Exam 2 Questions and Correct Answers/ Latest Update / Already Graded
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66

diciembre 2025

2025/2026

A+
Disponible en un paquete
During E. coli DNA replication, all newly synthesized or nascent DNA fragments must have one of the following characteristics a. a 5' hydroxyl and 3' triphosphate b. a 5' triphosphate and 3' monophosphate c. 5' monophosphate and 3' hydroxyl d. 5' triphosphate and 3' hydroxyl Ans: d. 5' triphosphate and 3' hydroxyl Among the 3 DNA polymerases in E. coli, DNA polymerases I and III differ in a number of properties that make DNA polymerase III a more s...
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Examen

MMSC490 Exam 2 Questions and Correct Answers/ Latest Update / Already Graded
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47

diciembre 2025

2025/2026

A+
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Aminoacyl tRNA synthetases are enzymes that connect amino acids while they are held in place on ribosomes by transfer RNAs. attach the terminal CCA sequence to transfer RNAs. synthesize transfer RNAs. attach amino acids to specific transfer RNAs. Ans: attach amino acids to specific transfer RNAs. E. coli contains about .................... different tRNAs that code for .................... different amino acids. 40; 20 50; 20 62; 40 62; 20 Ans: 40; 20 All rights reser...
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Examen

MMSC490 Exam 1 Questions and Correct Answers/ Latest Update / Already Graded
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65

diciembre 2025

2025/2026

A+
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cytoplasmic organelles are: a. absent in prokaryotic cells and present in eukaryotic cells. b. present in both prokaryotic and eukaryotic cells. c. present in prokaryotic cells and absent in eukaryotic cells. d. absent in both prokaryotic and eukaryotic cells. Ans: a. absent in prokaryotic cells and present in eukaryotic cells E. coli is a useful model system for molecular biology studies because: a. it has a small genome. b. it reproduces rapidly. c. mutants can easily be is...
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Examen

MMSC490 Questions and Correct Answers/ Latest Update / Already Graded
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23

diciembre 2025

2025/2026

A+
Disponible en un paquete
What are genes? Ans: Segments of DNA that encode proteins or RNA. What is transcription? Ans: The process where the nucleotide gene sequence is copied into RNA. What is translation? Ans: The process where the nucleotide sequence of RNA is used to specify the order of amino acids in a protein. What are the main components of present-day biological membranes? Ans: They are composed of phospholipids, which have hydrophobic hydrocarbon chains and hydrophilic head gro...
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