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

14. DNA Synthesis

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

Telomerase synthesizes DNA in the            direction.

The region of DNA that holds two sister chromatids together.

Enzymes that elongate a new DNA strand during replication.

Telomeres

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

How does telomerase prevent linear chromosomes from shortening during replication?

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

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