Neco Model Questions Vol1 2020 Biology Question 44

Practice objective / multiple choice question 44 from the 2020 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2020 Biology Objective / Multiple Choice Hard Difficulty
Question 44 NECO_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • objective

In an exponential bacterial culture, the population increases from \(1.0\times10^{6}\) cells to \(8.0\times10^{6}\) cells in \(2\) hours. (a) Determine the generation time (the time required for the population to double). (b) If an antibiotic is applied that lengthens the generation time by \(50\%\) while all other conditions remain unchanged, what will be the cell count after \(2\) hours starting from the same initial \(1.0\times10^{6}\) cells? Express your answer in scientific notation.

Answer Options

A. Generation time = 0.80 h (≈48 min); after antibiotic the count = 5.0×10⁶ cells
Correct Answer B. Generation time = 0.67 h (≈40 min); after antibiotic the count = 4.0×10⁶ cells
C. Generation time = 0.50 h (≈30 min); after antibiotic the count = 3.2×10⁶ cells
D. Generation time = 0.67 h (≈40 min); after antibiotic the count = 2.0×10⁶ cells
Correct Answer
B
Correct Option:
Generation time = 0.67 h (≈40 min); after antibiotic the count = 4.0×10⁶ cells

About This Question

This is Neco Model Questions Vol1 2020 Biology Question 44. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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