Telomere replication - Study guides, Class notes & Summaries

This is a summary of all the lectures of molecular genetics. It is edited with highlights and additional pictures that will help to understand everything better!

Origin of replication Site where the replication of a DNA molecule begins on a chromosome, consisting of a specific sequence of nucleotides. Bacteria only have one, eukaryotes have many. Replication fork/bubble - A Y-shaped point that results when the two strands of a DNA double helix separate so that the DNA molecule can be replicated - Single fork in Prokaryotic cells - 100s of forks in Eukaryotic cells - Replication will proceed in both directions (form a bubble) Semiconservative replicatio...

BIOD_152_Final_Exa m Correct Answer Replication of DNA begins at a single origin of replication and then proceeds the entire length of the strand, in one direction (T/F) False What enzyme is responsible for relieving the stress associated with the twisting and untwisting of a DNA strand during replication. Topoisomerase As a replicated DNA strand elongates, what enzyme is responsible for adding nucleotides? DNA polymerase The energy required to add a nucleotide to a growing chain is s...

Green River College: BIOL 100 Unit 3 Notes Latest Updated Chapter 6: Energy for life Learning Objectives: 1. Identify the cellular structure where photosynthesis occurs and describe its function. 2. State the overall chemical equation for photosynthesis. 3. Recognize what is meant by the terms reduction and oxidation. 4. Describe the function of photosynthetic pigments. 5. Explain the flow of electrons in the light reactions. 6. Explain how ATP and NADPH are generated in the light reac...

What is the end replication problem? With consecutive rounds of DNA replication, the ends of the DNA, the telomeres will become shorter and shorter What is the Hayflick Limit? -Telomere provide a means for "counting" cell division -The number of times a normal human cell population will divide until cell division stops -Empirical will get slightly shorter with each new cell division until they shorten to a critical length (this is what the graph shows) What are the main functions of telomere...

Free nucleotides are added at the replication fork of DNA using the enzyme DNA polymerase Which of the following is the DNA at the end of linear chromosomes? telomere In the semiconservative replication of DNA, each of the new double strands of DNA has one original strand and one newly assembled strand Nucleotide excision repair is particularly important when thymine dimers are formed from exposure to UV light The strand that is synthesized continuously in the 5' to 3' direction th...

Overall organizational structure of the human chromosome - correct answer normally contain a single, immensely long DNA double helix; to avoid tangling and to manage the long chain efficiently they are complexed with various proteins and sometimes noncoding RNAs to form chromatin that undergoes different levels of coiling and compaction Chromatin - correct answer the structure of DNA complexes with pro...

Friedrich Miescher - discovered DNA in 1869 But did not know (Isolated phosphate) rich acidic compounds Frederick Griffith - Discovered transformation during an experiment that involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and heat-killed S cells with living R cells. Avery, MacLeod, McCarty - Identified the heritable substance as DNA Used test tubes- vitro Hershey and Chase - performed experiments showing that DNA is the genetic material of a phage known...

1. Epigenetic: Changes in phenotypeHeritable Not due to changes in DNA sequence DNA methylation or histone modification 2. Collective term for all different DNA molecules within a cell or organism: - Genome 3. DNA protein complex: Chromosome 4. How many DNA molecules does a male have? female have?: Male 25Female 24 5. Single ring based on carbon and nitrogen atoms C,T: Pyrimidine 6. Double ring structure A, G: Purine 7. How many bonds holds together G-C: 3 hydrogen bonds 8. How many ...

BIO 111 TAMU Fletcher Exam 3 Already Graded A Friedrich Miescher discovered DNA in 1869 But did not know (Isolated phosphate) rich acidic compounds Frederick Griffith Discovered transformation during an experiment that involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and heat-killed S cells with living R cells. Avery, MacLeod, McCarty Identified the heritable substance as DNA Used test tubes- vitro Hershey and Chase performed experiments showing that DNA is the...