Tutor Marked Assignment C Biology

Tutor marked assignment biology B

Question 1

1. Respiration
2. Anaerobic respiration
3. It’s because the blood cannot bring oxygen to the muscle fast enough for it to get all of its energy from aerobic respiration, like in a 100m race.
4. The lactic acid is produced in the muscle cells and the human muscle breaks down glucose to lactic acid.
5. When lactic acid reacts with oxygen in the bloodstream, your liver soaks up the circulating lactate.
6. Because a marathon runner takes there time and runs at a steady pace, therefore the lactic acid will not increase because he is consuming his oxygen.

Question 2

1. The higher the temperature will be, the quicker the solution will become clear, and so the rate of reaction will increase.
2. When the temperature becomes hotter than around 30°c the rate of reaction will decrease due to the denaturing of the enzyme.
3. i. Time taken for digestion of protein in minutes

ii. The temperature of the surroundings

1. Yes they did, the 65°C because all the other ones had an effect apart from this one and this is because the temperature was so hot the rate of reaction decreased.
2. i. 45°C

ii. This is because it took the least time as the hottest temperature with an effect.

1. Because it was so hot there was no effect and so there no was no time needed, this is because the higher the temperature the quicker the solution.
2. The relative amount of the protein and the enzyme. It would effect because it’s got a high temperature.  Another one is the amount of stirring or agitation.
3. i. to make it reliable they could of commented on it.

ii. Have less results.

1. i. Wear goggles and wear a lab jacket and gloves.

ii. Wear goggles so it protects your eyes from any toxic liquid and wear a lab jacket and gloves so you cover your body from anything burning your skin. If enzyme comes in contact then

Question 3

1. A piece of gym equipment you could use is a treadmill. I will test a human to run on the treadmill and put the speed up to fast and see if he respire anaerobically.
2. To make it reliable and valid I will make a table with two results, one person who runs fast and the other who runs at a steady pace.