97' SBIOA Exam
Part A: M/C
Part B: Short Answers
Part C: Essay Question
Solve some stuff, and comment on what you solved.
Each is worth 10. [30 in total
(est. time: 30
1. A calorimeter which is 20% efficient had 100 g of water go from 20 °C to 60 °C. In doing so, a peanut lost 2 g of biomass. Two grams of peanut represents 0.01 of a mole of the biomass. What is the theoretical heat of reaction for the peanut?
2. In March 1997 off Canada’s west coast, 5 teams of biologists each caught and tagged 4000 salmon for a total of 20,000 tagged salmon. They then released the fish in the Juan de Fuca Strait. After 2 months had gone by, the 5 teams went back to the same spots and each recaptured 1000 salmon. The results are shown in
Team Leader Number of fish of the 1000 recaptured which were tagged.
Joel “Mad Dog” Moran 180
Tran “The Beast” Thompson 210
Craig “Arrrh Matey” Lising 220
Danielle “The Nutbar” Vander Loonie 200
Tony “Slick” Elias 190
a) Estimate the population of salmon.
b) Comment on the truthfulness or validity of the calculation.
3. Use an analogy of a car’s accelerator and brake pedal to describe either the lac or trp operon or the CAP repressor. Make sure to describe what turns on and off the genes, whether the gene is normally on, etc.