Waec Model Questions Vol1 2017 Biology Question 50

Practice objective / multiple choice question 50 from the 2017 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2017 Biology Objective / Multiple Choice Medium Difficulty
Question 50 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

A woman has a 28‑day menstrual cycle with ovulation on day 14. Progesterone peaks at 8 ng mL⁻¹ on day 21 and thereafter declines exponentially with a half‑life of 5 days. (a) What is the expected progesterone concentration on day 25? (b) If fertilisation occurs on day 14 and the embryo reaches the uterus after 5 days, on which day of the cycle is implantation expected to occur?

Answer Options

Correct Answer A. Progesterone on day 25 ≈ 4.6 ng mL⁻¹; implantation expected on day 21 of the cycle
B. Progesterone on day 25 ≈ 5.2 ng mL⁻¹; implantation expected on day 22 of the cycle
C. Progesterone on day 25 ≈ 4.0 ng mL⁻¹; implantation expected on day 23 of the cycle
D. Progesterone on day 25 ≈ 3.8 ng mL⁻¹; implantation expected on day 20 of the cycle
Correct Answer
A
Correct Option:
Progesterone on day 25 ≈ 4.6 ng mL⁻¹; implantation expected on day 21 of the cycle

About This Question

This is Waec Model Questions Vol1 2017 Biology Question 50. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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