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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 Heart3h 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

Steps of Translation

Anatomy & Physiology

3. Energy & Cell Processes

Steps of Translation

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Multiple Choice

The P site of a ribosome does which of the following?

It holds the tRNA that is carrying the next amino acid to be added to the growing polypeptide chain.

It helps "unzip" DNA during transcription.

It catalyzes the addition of amino acids to the tRNAs.

It holds the tRNA carrying the growing polypeptide chain.

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Verified step by step guidance

Understand the structure of a ribosome, which consists of three sites: the A site, P site, and E site.

Recognize the function of each site: the A site holds the tRNA carrying the next amino acid, the P site holds the tRNA with the growing polypeptide chain, and the E site is where tRNAs exit.

Identify the role of the P site specifically: it is responsible for holding the tRNA that carries the growing polypeptide chain during protein synthesis.

Differentiate between the processes of transcription and translation: transcription involves the synthesis of RNA from DNA, while translation involves the synthesis of proteins from mRNA.

Conclude that the P site of the ribosome is involved in translation, not transcription, and its primary function is to hold the tRNA with the growing polypeptide chain.