Telomeres - Study guides, Class notes & Summaries

The hypothesis that telomeres connected to aging suggests that aging increases as telomeres get shorter Roger is a 40 year old male. He just had an appointment with his physician. Although he is currently healthy, his doctor told him it would be in his best interest to lose some weight and begin exercising because he has a history of heart disease in his family. This is what type of prevention? primary When hpa axis is responding to a stressor, what hormone causes the release of adrenocorticot...

telomeres - Answer Complexes of DNA and proteins at the ends of eukaryotic chromosomes. telomerase - Answer An enzyme in eukaryotes that replicates the ends of chromosomes. cistron - Answer A segment of DNA that encodes a single polypeptide. gene - Answer A DNA segment or sequence that codes for a polypeptide, rRNA, or tRNA

Honors Biology Final Exam 2024 with Verified Solutions What is the role of microtubules in cell division? Microtubules form the mitotic spindle, which helps separate chromosomes into daughter cells during cell division. How does the concept of endosymbiosis explain the origin of mitochondria and chloroplasts? Endosymbiosis suggests that mitochondria and chloroplasts originated from free-living prokaryotes that were engulfed by a host cell, establishing a mutualistic relationship...

Biology 1001 LSU Hrincevich Exam 3 Questions and Answers Already Passed **1. Growth factors primarily stimulate:** - (A) The production of cyclins. - (B) The cell to skip the S and G1 phases of interphase and undergo mitosis directly. - (C) Cdk's to synthesize enzymes that digest cyclins. - (D) The cell to ignore the checkpoints of the cell cycle. - (E) None of the above. **2. A key distinction between mitosis and meiosis is:** - (A) Meiosis produces two daughter cells, while mito...

Biology Major Field Test Bank Questions with 100% Correct Answers Updated In DNA replication, the leading strand requires only one primer and can then be synthesized continuously while the lagging strand requires many primers and is synthesized in discrete sections called _____________ ____________ - Answer Okazaki fragments The ends of chromosomes are called ________ and they contain a high G-C content to prevent DNA unraveling - Answer Telomeres Promoters are within 25 base pairs ...

Helicase - Unwinds DNA in both directions Gyrase - topoisomerase that relieves supercoiling ahead of replication fork Single Stranded Binding proteins do what? - Stabilize single stranded DNA Primase - Enzyme that makes RNA primers DNA polymerase cannot? - Reconstruct the 5' end of a DNA strand this poses problems for linear chromosome integrity Telomeres - Repetitive DNA sequences TTAGGG -no protein coding -binds two types Two types of proteins that binds in telomeres - ...

USABO Practice Questions with Verified Solutions What enzyme does HIV use to convert RNA to DNA? Reverse Transcriptase The promoter region of a prokaryotic gene is located ______ to the gene and is the binding site for ______. 5'...RNA polymerase Which of the following is TRUE of prokaryotes? I. Simultaneous transcription and translation II. Presence of intron sequences III. Circular DNA I and III only Integral transmembrane proteins are proteins imbedded in the cell membrane...

This is the term that refers to biological aging correct answer: Senescence The "genetic programming" theory of aging proposes the existence of _____________ that control biological changes A. Telomeres B. Heritability C. Free radicals D. Aging Genes correct answer: D. Aging Genes Theories about aging can be organized into two groups, those that emphasize __________ and those that emphasize _________ . correct answer: programmed effects of specific genes & cumulative effects of...

2024 Newest |BSC 170 Final Exam | UPDATE|COMPREHENSIVE FREQUENTLY MOST TESTED QUESTIONS AND VERIFIED ANSWERS|GET IT 100% ACCURATE 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 - ANSWER-A Which of the following statements most accurately reflects the biological aspects of aging i...

Biology 101 UNL Final (Glider) Questions and Answers | Latest Update | 2024/2025 | Rated A+ What is the role of peroxisomes in the cell? Peroxisomes break down fatty acids and detoxify harmful substances by producing and degrading hydrogen peroxide. How do plant cells use vacuoles differently from animal cells? Plant cells use vacuoles for storing nutrients, waste products, and providing structural support through turgor pressure, whereas animal cells have smaller vacuoles ...