Neco 2020 Biology Question 13

Practice objective / multiple choice question 13 from the 2020 Neco Biology examination.

Neco 2020 Biology Objective / Multiple Choice Hard Difficulty
Question 13 NECO • 2020 • BIOLOGY • objective

A bacterial culture at 30 °C starts with \(2\times10^{5}\) cells mL\(^{-1}\). After 4 hours the count is \(1.6\times10^{7}\) cells mL\(^{-1}\). Assuming exponential growth, (a) determine the generation time in minutes, and (b) if the temperature is raised to 37 °C causing the generation time to decrease by 20 %, calculate the expected cell count after the same 4‑hour period at 37 °C.

Answer Options

Correct Answer A. Generation time ≈ 38 min; cell count ≈ 4.8×10⁷ cells mL⁻¹
B. Generation time ≈ 45 min; cell count ≈ 6.4×10⁷ cells mL⁻¹
C. Generation time ≈ 30 min; cell count ≈ 2.5×10⁷ cells mL⁻¹
D. Generation time ≈ 50 min; cell count ≈ 3.2×10⁷ cells mL⁻¹
Correct Answer
A
Correct Option:
Generation time ≈ 38 min; cell count ≈ 4.8×10⁷ cells mL⁻¹

About This Question

This is Neco 2020 Biology Question 13. It is one of the objective questions from the 2020 Neco Biology examination.

Difficulty level: Hard .

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