Domanda del libro di testo
Is a DNA molecule neutral, negatively charged, or positively charged? Explain.
1043
views
Ch.26 Nucleic Acids and Protein Synthesis
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 26, Problema 12
What are Okazaki fragments? What role do they serve in DNA metabolism?
Guida verificata passo dopo passo1
Okazaki fragments are short sequences of DNA nucleotides (typically 100-200 nucleotides in eukaryotes and 1000-2000 in prokaryotes) that are synthesized discontinuously during DNA replication on the lagging strand.
DNA replication is semi-conservative and occurs in the 5' to 3' direction. Since the two strands of DNA are antiparallel, the leading strand is synthesized continuously, while the lagging strand is synthesized in short, discontinuous segments called Okazaki fragments.
The role of Okazaki fragments is to enable the replication of the lagging strand, which cannot be synthesized continuously due to the antiparallel nature of DNA and the unidirectional activity of DNA polymerase.
Once the Okazaki fragments are synthesized, an enzyme called DNA ligase joins these fragments together by forming phosphodiester bonds, creating a continuous DNA strand.
In summary, Okazaki fragments are essential for the accurate and complete replication of the lagging strand, ensuring that the entire DNA molecule is duplicated during cell division.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
3mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Okazaki Fragments
Okazaki fragments are short sequences of DNA, typically ranging from 100 to 200 nucleotides in eukaryotes, that are synthesized on the lagging strand during DNA replication. They are formed because DNA polymerase can only synthesize DNA in the 5' to 3' direction, necessitating the creation of these fragments as the replication fork opens up.
Video consigliato:
Percorso guidato
1:31
Steps of DNA Replication Example 1
DNA Replication
DNA replication is the biological process by which a cell duplicates its DNA, ensuring that each daughter cell receives an exact copy of the genetic material. This process involves unwinding the double helix, synthesizing new strands, and requires various enzymes, including DNA polymerases, helicases, and ligases, to facilitate the accurate and efficient copying of DNA.
Video consigliato:
Percorso guidato
1:40Intro to DNA Replication Example 2
Lagging Strand
The lagging strand is one of the two strands of DNA being replicated during DNA synthesis. It is synthesized discontinuously in short segments (Okazaki fragments) because it runs in the opposite direction to the replication fork movement. This results in a more complex synthesis process compared to the leading strand, which is synthesized continuously.
Video consigliato:
Percorso guidato
1:31Steps of DNA Replication Example 1
Pratica correlata
Domanda del libro di testo
What is the difference between DNA polymerase and DNA ligase?
833
views
Domanda del libro di testo
Draw the structures of adenine and uracil (which replaces thymine in RNA), and show the hydrogen bonding that occurs between them.
853
views
Domanda del libro di testo
What is the function of the spliceosome in hnRNA?
1417
views
Domanda del libro di testo
What mRNA base sequences are complementary to the following DNA template sequences? Be sure to label the 5′ and 3′ ends of the complementary sequences.
a. 5′ CAT GCT CTA CAG 3′
1274
views
Domanda del libro di testo
DNA and RNA, like proteins, can be denatured to produce unfolded or uncoiled strands. Heating DNA to what is referred to as its “melting temperature” denatures it (the two strands of the double helix become separated). Why does a longer strand of DNA have a higher melting temperature than a shorter one?
692
views