Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Organization of DNA in the Cell

Anatomy & Physiology

3. Energy & Cell Processes

Organization of DNA in the Cell

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Multiple Choice

The region of a chromosome in which the two double strands of replicated DNA are held together is called __________.

chromatin

a centriole

a chromatid

an aster

a centromere

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Verified step by step guidance

Understand the structure of a chromosome: Chromosomes are made up of DNA and proteins, and during cell division, they replicate to ensure each new cell receives a complete set of genetic information.

Identify the key components of a replicated chromosome: After replication, a chromosome consists of two identical sister chromatids held together at a specific region.

Define the term 'centromere': The centromere is the region of a chromosome where the two sister chromatids are joined together. It plays a crucial role during cell division, particularly in the alignment and separation of chromatids.

Differentiate between the given options: Chromatin refers to the material that makes up chromosomes, consisting of DNA and proteins. A centriole is involved in cell division but is not part of the chromosome structure. A chromatid is one of the two identical halves of a replicated chromosome. An aster is a star-shaped structure formed around each centrosome during mitosis.

Conclude that the correct term for the region where the two strands are held together is 'centromere', as it is the specific part of the chromosome responsible for the attachment of sister chromatids.