Telomeres - Study guides, Class notes & Summaries

Which treatment was shown to reverse aging in the progeria model in mice with rapid aging disorders? A. activating the telomerase enzyme B. deleting the kinetochore of chromosome 7 C. yoga and accupuncture D. exposure to high levels of radiation once a week A Which of the following statements most accurately reflects the biological aspects of aging in humans? A. Aging is strictly caused by physiological changes that have no genetic basis over time B. Aging is the result of accum...

Explain how the dynamic interaction between mind and body impacts wellness. "Brain in the belly"- the gut uses some of the same neurotransmitters as the brain (the ENS) "Stress and anxiety may cause aging"- those with higher stress have shorter telomeres and their telomerases don't work/function as well "Interactions between the brain and immune system"- the CNS, immune system, and other systems work together in a dynamic way Telomeres DNA protein complexes that help stabilize a cell's ...

Briefly explain how the base pairs A-T and C-G bond to each other and why the interactions they form are important to DNA unwinding. Base pairs form hydrogen bonds to each other. G and C form 3 hydrogen bonds, while A and T form 2 hydrogen bonds. These hydrogen bonds are weak electrostatic interactions that are able to hold the DNA together but are easily broken for the DNA to unwind. Why are telomerase inhibitors an attractive prospect for cancer therapies? >90% of cancer cells expres...

when and who observed the change of nonvirulent organisms into virulent ones via origins of replication are marked by a complex of protiens called - Answer origin recognition complex (ORC) ORCs recruit another set of proteins to the origin forming the - Answer prereplicative complex (pre-RC) telomeres - Answer structures at the ends of chromosomes, enzyme that forms the telomeres and maintains them

Pyrimidine - One carbon ring Cytosine, Thymine, Uracil Purine - Two carbon rings Adenine, Guanine How are nucleotides joined together? - Condensation to form phosphodiester bond What is the function of mRNA? - Carries genetic info out of nucleus Transcript translated to protein What is the function of tRNA? - Carries aa to ribosome Anticodon pairs with codon on mRNA strand What is the function of rRNA? - part of ribosome structure most abundant RNA coordinated coupling of tRNA to mRNA...

Lab Report Format Expectations Utilize college level grammar and professional formatting when completing this worksheet. Pre-Lab Questions 1. Chromosomes are made primarily of what two components? Be specific. DNA, which contains genes and protein that helps to organize DNA 2. What are the differences between mitosis and binary fission? Identify at least one difference, and explain why it is significant. The main difference between mitosis and binary fission is that mitosis occurs in euk...

Bio 315- Exam 1 Questions and Answers 100% Correct From the list below, select the one cellular structure or compartment that is not found in animal cells: A. Plasmodesmata B. Golgi apparatus C. Endoplasmic Reticulum D. Plasma membrane - Correct Answer ️️ -A The most reliable feature distinguishing a eukaryotic cell from prokaryotic cell is the: A. Presence of plasma membrane B. Presence of a nucleus C. Eukaryotic cells larger size D. Presence of DNA - Correct Answer ️️ -B No...

Heterochromatin - Regions in chromosome where fibers are highly condensed Few genes - resistant to transcription by not completely exempt Concentrated in centromeres and telomeres What is a simple genome and which type of cell has one? - Codes for fewer proteins then a complex genome, prokaryotes Plant cell walls were.... - Reacquired after eukaryotes lost cell walls when they diverged from prokaryotes Genes - Regions of DNA transcribed into any type of RNA What are RNPs? Examples - Ribo...

Non-modifiable risk factors - ACCURATE ANSWERAge Sex Race Family history In many studies, must be controlled Statistical control: allows for the removal of variables influence Age - ACCURATE ANSWERMain risk factor for major diseases like cardiovascular disease, cancer, diabetes, Alzheimer's disease, etc. About 2/3 of all deaths worldwide This proportion is much higher in industrialized nations due to disease preventions causing them to live longer "programmed" aspect of aging - A...

bacterial DNA 1-2 circular chromosomes, DNA is much longer than the cell, replicates right before binary fission, found in the cytoplasm Prokaryotic chromosomes circular, one origin of replication, 1000 nucleotides/second, primer removal = DNA polymerase 1, strand elongation = DNA polymerase III eukaryotic chromosomes multiple linear strands, have centromeres and telomeres, need to separate, multiple origins of replication, 100 nucleotides/second; primer removal = RNAse H; elongationpoly...