1. Biochemistry [4] c) What molecule is a product of protein synthesis? 2. Macromolecules and Enzymes [6]

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1 1. Biochemistry [4] Write the etter for one of the five moecues beow that best fits the foowing descriptions. [The same etter can be used more than once, if appropriate.] a) What moecue is a high energy compound? b) What moecue is a product of gycoysis? c) What moecue is a product of protein synthesis? d) What moecue wi undergo beta-oxidation? A. B. OH C=O C=O C. D. CH3 x 3 H O H H H H HO C O C C C C = C H H H HO C H HO C H H E. O O H H // H // H N C C N C C OH R H R 2. Macromoecues and Enzymes [6] a) Demonstrate dehydration synthesis through the bonding of two monomers of a macromoecue. Fee free to use carbohydrates, ipids, or amino acids. Show the starting materia and what it ooks ike afterwards, and don t forget other byproduct(s). What kind of bond has formed here? [4] b) Seect two factors that infuence enzyme activity and expain how. [2] 3. DNA Repication [5]!1

2 ! Using the abes on the diagram beow as a starting point, expain DNA Repication C A B D A B C D 4. Protein Synthesis [5] A portion of a specific DNA moecue consists of the foowing sequence of nuceotides: TAC GAA CTT CGG TCC ATT This DNA sequence codes for the foowing short poypeptide: methionine eucine gutamic acid proine arginine a) Describe the steps in the synthesis of this poypeptide, starting with the synthesis of mrna. 5. Biotechnoogy [6] a) In order to create a DNA fingerprint, a segment of DNA must be ampified using the poymerase chain reaction (PCR). Briefy outine the steps in PCR. [4] b) Expain TWO appications of DNA fingerprinting. [2] 6. Gene Contro [4] a) Labe the given diagram of the ac operon. [2]!2

3 b) Expain how the operon contros messenger RNA production and the reguation of protein synthesis in bacteria ces. [2] Homeostasis 7. Feedback mechanisms. [4] Expain, using an exampe, how a feedback mechanism aows the human body to retain its homeostasis, refer to the sensor, the coordinator, reguator, and resut in your exampe. 8. Synapses [5] Using the diagram beow, expain how a nerve impuse is carried from one neuron to the next neuron across a synapse. 9. Nephrons [5] Refer to the diagram of the nephron to answer the questions in the tabe beow. a) b) c) d) Question What part of the nephron is the major site of water recovery (reabsorption) from the urine? What part of the nephron is the site of the reabsorption of amino acids? What part of the nephron is impermeabe to water? What part of the nephron contains urine (fitrate) with the highest concentration of gucose? Name of part of Nephron Letter on diagram!3

4 e) What part of the nephron contains urine (fitrate) with the highest concentration of urea? 9b. Popuation Dynamics 10. Density [2] Technoogica tracking has indicated that there are 480 moose iving in a 600 hectare section of Agonquin Park. This section of the park contains 4 akes that are approximatey 12 hectares each. What is the ecoogica density of the moose. 11. Popuation number [2] In a river in British Coumbia, 430 sockeye samon were captured and marked on the fin with a uniquey numbered T-bar anchor tag. Two weeks ater, a tota of 154 sockeye samon were recaptured and 18 bore the tags on their fin. Estimate the sockeye samon popuation in this river during this study. 13. Human Interactions [3] A species of eage ives in Centra Ontario. It feeds on sma fish in freshwater akes. There are increasing pressures from humans as recreation (boating and cottaging) in the area expands. Sma communities in the area are aso growing due to increased tourism. The bird is not hunted for its meat, body parts, or sport. Describe THREE human-infuenced factors that coud cause the species to become endangered. 13. Endangered species [4 marks] Given the data in Tabe 1, EXPLAIN which of the foowing species is MOST ikey to become endangered AND which is LEAST ikey to become endangered. Species A Species B Species C Species D Species E Species F SIZE sma medium medium arge sma arge RANGE arge medium sma medium arge sma DIET herbivore carnivore [eats E & F] carnivore [eats ony F] omnivore omnivore herbivore BIOTIC POTENTIAL medium high medium high ow ow HUMAN INTERACTIONS few few many some some many!4

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