14. DNA Synthesis

Telomeres

How does telomerase prevent linear chromosomes from shortening during replication?

Plants experience a vast array of conditions that can alter their growth and development, including temperature and availability of water, nutrients, and light. They are also exposed to pollutants such as acid rain formed largely as a result of burning fossil fuels and volcanic eruptions. Acid rain can strip minerals and nutrients from the soil, and eat away the outer waxy layer of tissue that protects a plant. Acid rain is still a major environmental problem in certain regions. How does acid rain affect plant growth?

Beyond primary and secondary growth, what other aspects of plant growth might be negatively affected when plants are exposed to environmental stress?

The region of DNA that holds two sister chromatids together.

Enzymes that elongate a new DNA strand during replication.

What are telomeres and how do they protect our cells?

Telomeres, Telomerase, and their Function

Which of the following types of cells are affected most by telomere shortening?

Telomerase will speed up the rate of cell division.

Telomerase stops telomere shortening and slows or stops cellular aging. c) Telomerase shortens telomeres, which slows or stops cellular aging.

Telomerase shortens telomeres, which slows or stops cellular aging.

Telomerase would have no effect on cellular aging.

Telomere shortening puts a limit on the number of times a cell can divide. Research has shown that telomerase can extend the life span human cells. How might adding telomerase affect cellular aging?

How Telomerase Can Immortalize Cells and Cause Cancer

Telomerase Function - Animation

 No. As the name implies, telomerase is an enzyme that acts upon telomeres. 

 No. In fact, telomerase appears to slow cell aging and is generally present only in germ cells and cancer cells. 

 No. Telomerase may actually play a role in maintaining cancers by allowing cancerous cells to divide many times without losing the ends of their chromosomes. 

 No. Telomerase does act upon telomeres, but not by splitting them. 

Consider the meaning of the suffix "-ase."

Telomerase __________.

Telomeres and Telomerases

What Are Telomeres & Why They Are Important in Anti-Aging – Dr.Berg on Telomeres and Aging

Which of the following effects might be caused by reduced or very little active telomerase activity?

 get longer with each round of DNA replication 

 are found in both prokaryotic and eukaryotic cells 

 No. Prokaryotic chromosomes are circular; they do not have telomeres. 

 remain the same regardless of the frequency of DNA replication 

 No. Telomere length usually decreases with each round of DNA replication. 

 No. In general, the older the individual, the shorter the telomeres. 

 get shorter with each round of DNA replication 

Consider where telomeres are found.

Telomeres __________.

The Key to Chromosome Immortality - iBiology & Youreka Science

Learn the toughest concepts covered in Biology1&2 with step-by-step video tutorials and practice problems by world-class tutors 

Jason

General Biology

https://static.studychannel.pearsonprd.tech/courses/biology/thumbnails/biology

#FFFFFF

Vincent Stevenson

iBiology Science Stories

Dr.G Bhanu Prakash Animated Medical Videos

Easy Peasy

Jason Amores Sumpter

Dr. Eric Berg DC

RepeatDx

PremedHQ Science Academy

1. Introduction to Biology

2. Chemistry

3. Water

4. Biomolecules

5. Cell Components

6. The Membrane

7. Energy and Metabolism

8. Respiration

9. Photosynthesis

10. Cell Signaling

11. Cell Division

12. Meiosis

13. Mendelian Genetics

15. Gene Expression

16. Regulation of Expression

17. Viruses

18. Biotechnology

19. Genomics

20. Development

21. Evolution by Natural Selection

22. Evolution of Populations

23. Speciation

24. History of Life on Earth

25. Phylogeny

26. Prokaryotes

27. Protists

28. Plants

29. Fungi

30. Overview of Animals

31. Invertebrates

32. Vertebrates

33. Plant Anatomy

34. Vascular Plant Transport

35. Soil

36. Plant Reproduction

37. Plant Sensation and Response

38. Animal Form and Function

39. Digestive System

40. Circulatory System

41. Immune System

42. Osmoregulation and Excretion

43. Endocrine System

44. Animal Reproduction

45. Nervous System

46. Sensory Systems

47. Muscle Systems

48. Ecology

49. Animal Behavior

50. Population Ecology

51. Community Ecology

52. Ecosystems

53. Conservation Biology

[BOOK BIO] CLUTCH

Leading & Lagging DNA Strands

The Griffith Experiment

Chargaff's Rules

DNA Polymerases

Introduction to DNA Replication

Meselson-Stahl Experiment

Discovering the Structure of DNA

Steps of DNA Replication

The Hershey-Chase Experiment

DNA Repair

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

Physics

Patrick

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

Anatomy & Physiology

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities

Watch next