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Form 2 Biology respiration questions and answers
Write an equation that summarizes the process of aerobic respiration.
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1.
The diagram below shows a set up that was used to demonstrate fermentation. Glucose solution was boiled and oil added on top of it. The glucose solution was then allowed to cool before yeast suspension was added. (a) Why was the glucose solution boiled before adding the yeast? (b) What was the important of cooling the glucose solution before adding the yeast? (c) What was the use of oil in the
2.
What are the three end products of anaerobic respiration in plants?
3.
Give two reasons why accumulation of lactic acid during vigorous exercise leads to an increase in heartbeat.
4.
Describe: (i) Process of inhalation in mammals (ii) Mechanisms of opening and closing of stomata.
5.
The concentration of the lactic acid in blood during and after an exercise was determined. The results are shown in the graph below. (a) (i) By how much did the lactic acid increase at the end of 13 minutes? (ii) After how many minutes was the lactic acid concentration 71mg/#100cm^3# (iii) What would be the concentration of lactic acid at the #60^(th# minute? (b) Give a reason for the high rate of
6.
A process that occurs in plants is represented by the equation below. #C_6H_12O_6to 2C_2H_5OH+2CO_2#+ Energy (a) Name the process (b) State the economic important of the process named in (a) above
7.
Other than carbon dioxide, name other products of anaerobic respiration
8.
Name the substance which accumulates in muscles when respiration occurs with insufficient oxygen.
9.
(a) In what form is energy stored in muscles (b) State the economic importance of anaerobic respiration in plants.
10.
(a) A dog weighing 15.2kg requires 216kj while a mouse weighing 50g requires 2736kj per day. Explain. (b) What is the end product of respiration in animals when there is insufficient oxygen supply?
11.
(a) Name the products of anaerobic respiration in (i) Plants (ii) Animals (b) What is oxygen debt?
12.
Give three factors that determine the amount of energy a human being require in a day.
13.
Explain what happens when there is oxygen debt in human muscles.
14.
Explain how anaerobic respiration is applied in sewage treatment.
15.
How are the mitochondria adapted to their function?
16.
State two ways in which anaerobic respiration is applied in industries.
17.
In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below. The temperature readings were taken every morning for three consecutive days. (a) Which process was being investigated? (b) (i) What were the expected results? (ii) Account for the answer in (b) (i) above (c) Why were the seeds disinfected? (d) Why was
18.
(a) Give two differences in the products of anaerobic respiration between plants and animals. (b) Name the site of anaerobic respiration in a cell.
19.
Write an equation that summarizes the process of aerobic respiration.
20.
(a) Name the type of respiration that is most efficient. (b) Give a reason for your answer in (a) above.
21.
The diagram below represents a set up that students used in an investigation. (a) Name the physiological process that was being investigated. (b) State the role of potassium hydroxide in flask K (c) Account for the observation in boiling tube L and flask N.
22.
Name the three end products of anaerobic respiration in plants.
23.
The diagram below show an experimental set up to investigate a certain physiological process in plants. (a) State the aim of the experiment. (b) State the role of the following in the experiment. (i) Potassium hydroxide (ii) Aluminium foil. (c) Account for the expected colour change in the tube F.
24.
State the economic importance of anaerobic respiration in plants.
25.
In an experiment on respiration, a mouse was observed to have inhaled #200cm^3# of oxygen and exhaled 199.75#cm^3# of carbon (IV) oxide in ten minutes. (a) Calculate the respiratory quotient for the activity in the experiment. (b) Identify the possible food substance consumed by the mouse. (c) State the fate of the excess food name in (b) above in the human body.
26.
Explain why short distance runners breathe quickly and deeply at the end of the race.
27.
(a) Define respiration (b) State three activities in human digestive system that depend on respiration.
28.
Name two products of respiration in plants.
29.
The amount of blood flowing through a certain parts in the mammalian body at different activity levels was measured and results tabulated as shown in the table below. (a) Account for: (i) The high blood flow through cardiac and skeletal muscles during strenuous exercises. (ii) The results obtained for the alimentary canal at rest. (b) Name two wastes materials excreted by both the skin and the kid
30.
While investigating a certain metabolic process in plants, students set up the apparatus as shown below in a classroom and monitored it for 48 hours. (a) Identify the metabolic process under investigation. (b) Account for the observations made in the test tube at the end of the investigation.
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