Molecular biologyLesson 2 of 2 in the course Biochemistry of the Genome

RNA Structure, Viral Genomes, and Roles in Protein Synthesis

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

Save course
Lesson progress
0 / 5

Your progress is kept in this browser only.Sign up to save it

Summary

Ribonucleotides connect through phosphodiester bonds, forming a strand with a sugar-phosphate backbone and bases extending from it. In RNA, adenine pairs with uracil, while guanine pairs with cytosine.

RNA is usually single stranded, unlike the typically double-stranded DNA molecule. However, a single RNA strand can fold back on itself. Complementary sequences within the same molecule form intramolecular base pairs, producing stable shapes and complex three-dimensional structures. These shapes are important to the functions of many RNA molecules.

All flashcards

What components make up a ribonucleotide?
Ribose, one nitrogenous base, and a phosphate group.
How do complementary sequences help RNA fold?
They form internal base pairs that help the RNA adopt a functional three-dimensional shape.
How does mRNA contribute to protein synthesis?
It carries a copy of gene information to a ribosome, where its sequence guides amino-acid order.
What roles does rRNA play in a ribosome?
It helps position translation components and catalyzes peptide-bond formation.
How does tRNA help match amino acids to an mRNA message?
It carries an amino acid and pairs with a complementary mRNA sequence.

Quiz questions

  1. In gene expression, what does transcription produce from a DNA gene?Answer: An RNA copy of the gene's information.
  2. What is the primary role of mRNA in protein synthesis?Answer: It carries gene information to a ribosome and guides amino-acid order.
  3. Which reaction is catalyzed by ribosomal RNA during translation?Answer: Formation of peptide bonds between amino acids.
  4. How does tRNA help ensure that an amino acid matches the mRNA message?Answer: Its complementary sequence pairs with the mRNA while it carries the amino acid.
  5. Where do eukaryotic cells synthesize and process rRNA and assemble it into ribosomes?Answer: In the nucleolus.

Based on Microbiology by Nina Parker, Mark Schneegurt, Anh-Hue Thi Tu, Philip Lister, Brian M. Forster (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

More in Molecular biology

All Molecular biology lessons
Molecular biologyCancer-Related Gene Regulation: Cell-Cycle Control, Epigenetics, and RNA5 flashcards · 5 quiz questions · 4 gamesPlay free →Molecular biologyEukaryotic Promoters, Enhancers, and Transcriptional Regulation5 flashcards · 5 quiz questions · 4 gamesPlay free →Molecular biologyTranscription and Eukaryotic mRNA Processing5 flashcards · 5 quiz questions · 4 gamesPlay free →Molecular biologyGenetic Code, Translation, and Comparing DNA Yield in Fruit5 flashcards · 5 quiz questions · 4 gamesPlay free →Molecular biologyEukaryotic Messenger and Structural RNA Processing5 flashcards · 5 quiz questions · 4 gamesPlay free →Molecular biologyExperiments Establishing DNA as Genetic Material5 flashcards · 5 quiz questions · 4 gamesPlay free →