Gce Model Questions Vol1 2022 Biology Question 25

Practice objective / multiple choice question 25 from the 2022 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2022 Biology Objective / Multiple Choice Hard Difficulty
Question 25 GCE_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • objective

A bacterial culture starts with \(5 \times 10^{5}\) cells. After 3 h the count is \(4 \times 10^{7}\) cells, and the growth is exponential.\n(a) Calculate the generation time in minutes.\n(b) An antibiotic is added that reduces the growth rate by 30 %. Assuming exponential growth continues, how many cells will be present after a further 3 h?

Answer Options

A. Generation time ≈ 25.0 min; final count ≈ 9.5 × 10⁸ cells
Correct Answer B. Generation time ≈ 28.5 min; final count ≈ 8.6 × 10⁸ cells
C. Generation time ≈ 28.5 min; final count ≈ 6.4 × 10⁸ cells
D. Generation time ≈ 30.0 min; final count ≈ 7.2 × 10⁸ cells
Correct Answer
B
Correct Option:
Generation time ≈ 28.5 min; final count ≈ 8.6 × 10⁸ cells

About This Question

This is Gce Model Questions Vol1 2022 Biology Question 25. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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