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Question 9

From Biology SL Paper 3 (November 2024, TZ2)

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  1. The table shows the steps, timeline and efficiency for the production of fertile transgenic corn (Zea mays). Immature corn embryos were transformed with Agrobacterium tumefaciens to obtain resistance to bialaphos, a chemical herbicide.
Table detailing the process of creating transgenic corn, including steps, days, and number of organisms produced at various stages.
Table detailing the process of creating transgenic corn, including steps, days, and number of organisms produced at various stages.

(a) Describe the use of A. tumefaciens as a vector in the production of transgenic corn. [2]

(b) Calculate the efficiency in the production of transgenic corn, assuming all transgenic seeds germinated. [1]

(c) State another example of the use of A. tumefaciens in herbicide resistance. [1]

Textbook topics in this question

Review the exact course sections assessed by each question part.

Mixed-topic question
9(a)Transgenic crops and Agrobacterium vectors · legacy topic
9(b)Transgenic crops and transformation efficiency · legacy topic
9(c)Transgenic crops and herbicide resistance · legacy topic