Requirement of dead cells for xylem and living cells for phloem for transportation. Introduction: Xylem and phloem are complex tissues present in the plant are also known as transport tissues. They are vascular tissues and together they form vascular bundles in plants. Xylem helps in the transportation of solutes and water from roots towards the leaves and Phloem transports the food from leaves to the aerial parts of the plants.

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Transcription and Translation 1. What is the main function of transcription and translation? (2 marks) 2. How is transcription different in eukaryotic and prokaryotic cells? (2 marks) 3. Explain the difference between pre-mRNA and post-transcript mRNA. (2 marks) 4. What is the function of the following: (4 marks) i. the cap ii. spliceosome iii. Poly A tail iv. termination sequence 5. What are advantages to the wobble feature of the genetic code? (2 marks) 6. Explain the difference between the: (3 marks) i. A site & P site ii. codon & anticodon iii. gene expression and gene regulation 7. Explain how the stop codon allows for termination. (1 mark) 8. In your own words, summarize the process of translation. (2 marks)

Answer 1

Question

Chapter 36.5, Problem 3CC

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To explain: Requirement of dead cells for xylem and living cells for phloem for transportation.

Introduction: Xylem and phloem are complex tissues present in the plant are also known as transport tissues. They are vascular tissues and together they form vascular bundles in plants. Xylem helps in the transportation of solutes and water from roots towards the leaves and Phloem transports the food from leaves to the aerial parts of the plants.

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