Dcpip - Study guides, Revision notes & Summaries

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...

AP Biology MCQ Practice Exam 1 Questions and Answers Already Passed 12. Which of the follwing best describes the production of DMSP by coral and coral symbionts? 13. Which of the following best describes the effect of temperature on corals' ability to produce DMSP as shown in Figure 1? 14. Which of the following best describes the difference between the total amount of DSMP produced by adults compared to juveniles at the start of the 32C trial. 15. In addition to the effect of temperat...

1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 - Answer Daphnia of same species Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then BPM counted using tally marks of a sheet of paper for 15 seconds, x4 to give BPM repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with other daphnia calculate mean 2. Investigate the vitamin C content of food ...

Biology Edexcel Practicals A Level Questions With Complete Solutions 1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 Daphnia of same species and volume Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with othe...

state how an unsaturated lipid differs from a triglyceride (1 mark) - Ansan unsaturated lipid has double bonds between its carbons. compare and contrast diffusion and active transport (3 marks) - Ans-both mechanisms move molecules through the phospholipid bilayer -in both, molecules can move through proteins -diffusion occurs down a concentration gradient whereas active transport occurs against a concentration gradient - diffusion does not require energy but, active transport requires ...

SIT- releasing large numbers of sterile males Explain how using the SIT could reduce transmission of dengue... - Ans .Intraspecific competition Do not breed Suggest why the scientists released more transgenic males every week... - Ans .To replace ones that have died (they carry a lethal gene). Explain the advantage of the student using the IC50 in this investigation... - Ans .Provides a reference point. Explain how chemicals which inhibit the decolourisation of DCPIP could slow the grow...

Biology Edexcel Practicals A Level Questions With Complete Solutions 1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 Daphnia of same species and volume Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with othe...

What is the predicted weight, in grams, of 100 microliter of de-ionized water? - answer-0.1000g what numbers should be written to withdraw a 15ul solution on a P20 micropipette - answer-1-5-0 before turning on the microscope, set the microscope lamp intensity to its lowest setting, plus in the microscope, and make sure the _____ objective is in place. Use the condenser adjustment knobs to _______ the condenser, then lower the stage to its lowest point - answer-4x; fully raise Use the le...

IGCSE CIE Biology Paper 6 Revision Questions and Answers What is an independant variable? - ANSWERS-The variable that is changed by the investigator What is a dependant variable? - ANSWERS-A variable that changes and is measured What is a control variable? - ANSWERS-A variable that should be kept constant so as to not affect the result of the dependant variable How can you make an experiment better? - ANSWERS-Do it 3 times and then take an average. Exclude anomalies from your average. ...