Ch 6: Investigations on cellular respiration

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What is the aim of Investigation 1 described in the text?

To explain the significance of oxygen utilization in cellular respiration. (correct)

To observe the differences between germinating beans and boiled beans.

To demonstrate the production of carbon dioxide during aerobic respiration.

To study the effect of temperature on germinating beans.

In Investigation 1, why was a control setup with boiled beans used?

To compare the brightness of the glowing splint in both tubes.

To increase the speed of oxygen utilization.

To compare if any oxygen is consumed in the control setup. (correct)

To demonstrate the effect of temperature on respiration.

What can be inferred from the results of Investigation 1?

The glowing splint in the control tube dies out.

The consumption of oxygen during cellular respiration. (correct)

The control tube consumes more oxygen than the experimental tube.

The germinating beans stop respiration overnight.

What is the main purpose of Investigation 2 outlined in the text?

To show the production of carbon dioxide in aerobic respiration. Signup and view all the answers

Why is it essential to sterilize the equipment in Investigation 2?

To prevent contamination and ensure accuracy of results. Signup and view all the answers

What does the presence of a control setup signify in scientific investigations?

A comparison group to provide a baseline for evaluating experimental results. Signup and view all the answers

Which metabolic process generates energy from nutrients as mentioned in the text?

Cellular respiration Signup and view all the answers

What is demonstrated by the experiment described in Investigation 3?

Production of carbon dioxide during anaerobic respiration Signup and view all the answers

Why did the lime water in test tube D turn milky in Investigation 3?

Due to the production of carbon dioxide during anaerobic respiration Signup and view all the answers

What is the main difference in the results between test tube B and test tube D in the experiments?

Test tube B shows no gas production, while test tube D shows gas production. Signup and view all the answers

Which type of respiration was demonstrated in Investigation 3?

Anaerobic respiration Signup and view all the answers

What effect does boiling the sugar solution have in Investigation 3?

Removes oxygen Signup and view all the answers

What conclusion can be drawn about carbon dioxide production from the given experiments?

Carbon dioxide is produced during respiration in living organisms Signup and view all the answers

What was the purpose of setting up the apparatus with test tubes containing lime water?

To detect the presence of carbon dioxide Signup and view all the answers

Why was yeast used in the experiment to demonstrate carbon dioxide production?

To show carbon dioxide production under anaerobic conditions Signup and view all the answers

In Investigation 1, why is a control setup with killed beans used?

To provide a baseline for comparison where no oxygen is consumed. Signup and view all the answers

What does the glowing splint's reaction suggest in the experimental tube of Investigation 1?

Oxygen consumption is occurring. Signup and view all the answers

What is the primary purpose of inserting a glowing splint into each test tube in Investigation 1?

To detect oxygen presence or utilization. Signup and view all the answers

Why are germinating beans used in the experimental tube rather than other plant parts in Investigation 1?

Germinating beans demonstrate active cellular respiration. Signup and view all the answers

What significance does the boiling of some beans serve in Investigation 1?

To provide a comparison where cellular respiration is eliminated. Signup and view all the answers

What does the brighter burning of the glowing splint in the control tube signify in Investigation 1?

Absence of oxygen consumption. Signup and view all the answers

What is the purpose of setting up the apparatus with test tubes containing lime water in the experiments?

To observe the production or removal of carbon dioxide Signup and view all the answers

Why was a sugar solution boiled in Investigation 3?

To sterilize the solution for the experiment Signup and view all the answers

Which gas leads to the milky appearance of lime water in the experiments?

Carbon dioxide Signup and view all the answers

What is the main conclusion drawn about carbon dioxide production in the experiments?

It is a byproduct of both aerobic and anaerobic respiration Signup and view all the answers

Why was yeast used in the experiments to demonstrate carbon dioxide production?

To understand the role of yeast in cellular respiration Signup and view all the answers

What does the milky appearance of lime water indicate in the experiments conducted?

Presence of carbon dioxide produced by the organisms Signup and view all the answers

Why was a control set up with boiled beans used in one of the investigations?

To ensure any observed outcomes are due to the presence of living cells Signup and view all the answers

What effect did setting up the apparatus with yeast and sugar solution in anaerobic conditions have on the lime water in the test tubes?

It resulted in the lime water turning milky Signup and view all the answers

What is the primary difference between the experimental and control tubes in Investigation 1?

The glowing splint in the experimental tube dies out, while in the control tube it ignites. Signup and view all the answers

What does the occurrence of a glowing splint suddenly extinguishing imply in Investigation 1?

Oxygen is not consumed during cellular respiration. Signup and view all the answers

In Investigation 2, what could be a likely outcome if a similar experiment were conducted using boiled snails?

No metabolic processes would occur in the test tube. Signup and view all the answers

Why is Investigation 1 essential in providing insights into cellular respiration mechanisms?

To determine if oxygen is consumed during different stages of respiration. Signup and view all the answers

What does the presence of a control group with killed beans contribute to in Investigation 1?

It showcases the impacts of an absence of oxygen in metabolic processes. Signup and view all the answers

Hypothetically, if lime water was used in Investigation 2, what would its milky appearance imply?

The organism being studied produces little to no carbon dioxide. Signup and view all the answers

Based on the targeted outcomes in Investigation 1 and Investigation 2, why do scientists utilize living organisms in such research?

To unravel the intricate processes involved in energy generation at a cellular level. Signup and view all the answers

What conclusion can be drawn from the observation that lime water turns milky in Test Tube D of Investigation 3?

The snail in Test Tube D produced more carbon dioxide than the yeast-sugar solution. Signup and view all the answers

Why is it important to sterilize the equipment in Investigation 2 before setting up the experiment?

To prevent the growth of harmful bacteria that could affect the results. Signup and view all the answers

What effect does boiling the sugar solution have in Investigation 3 before setting up the experiment?

To remove oxygen from the solution. Signup and view all the answers

What is the purpose of setting up the apparatus with test tubes containing yeast and sugar solution in anaerobic conditions in Investigation 3?

To create an environment where anaerobic respiration takes place in yeast. Signup and view all the answers

Why was a control set up with boiled beans used in one of the investigations described in the text?

To compare the effects of boiled and unboiled beans on the lime water. Signup and view all the answers

What does the brighter burning of the glowing splint in the control tube signify in one of the investigations?

The presence of a higher concentration of oxygen in the control tube. Signup and view all the answers

What metabolic process results in the production of carbon dioxide during anaerobic cellular respiration?

Glycolysis Signup and view all the answers

In Investigation 2, why did the lime water remain clear in Test Tube B?

Absorption of carbon dioxide by the snail Signup and view all the answers

Ch 6: Investigations on cellular respiration

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Questions and Answers

What is the aim of Investigation 1 described in the text?

In Investigation 1, why was a control setup with boiled beans used?

What can be inferred from the results of Investigation 1?

What is the main purpose of Investigation 2 outlined in the text?

Why is it essential to sterilize the equipment in Investigation 2?

What does the presence of a control setup signify in scientific investigations?

Which metabolic process generates energy from nutrients as mentioned in the text?

What is demonstrated by the experiment described in Investigation 3?

Why did the lime water in test tube D turn milky in Investigation 3?

What is the main difference in the results between test tube B and test tube D in the experiments?

Which type of respiration was demonstrated in Investigation 3?

What effect does boiling the sugar solution have in Investigation 3?

What conclusion can be drawn about carbon dioxide production from the given experiments?

What was the purpose of setting up the apparatus with test tubes containing lime water?

Why was yeast used in the experiment to demonstrate carbon dioxide production?

In Investigation 1, why is a control setup with killed beans used?

What does the glowing splint's reaction suggest in the experimental tube of Investigation 1?

What is the primary purpose of inserting a glowing splint into each test tube in Investigation 1?

Why are germinating beans used in the experimental tube rather than other plant parts in Investigation 1?

What significance does the boiling of some beans serve in Investigation 1?

What does the brighter burning of the glowing splint in the control tube signify in Investigation 1?

What is the purpose of setting up the apparatus with test tubes containing lime water in the experiments?

Why was a sugar solution boiled in Investigation 3?

Which gas leads to the milky appearance of lime water in the experiments?

What is the main conclusion drawn about carbon dioxide production in the experiments?

Why was yeast used in the experiments to demonstrate carbon dioxide production?

What does the milky appearance of lime water indicate in the experiments conducted?

Why was a control set up with boiled beans used in one of the investigations?

What effect did setting up the apparatus with yeast and sugar solution in anaerobic conditions have on the lime water in the test tubes?

What is the primary difference between the experimental and control tubes in Investigation 1?

What does the occurrence of a glowing splint suddenly extinguishing imply in Investigation 1?

In Investigation 2, what could be a likely outcome if a similar experiment were conducted using boiled snails?

Why is Investigation 1 essential in providing insights into cellular respiration mechanisms?

What does the presence of a control group with killed beans contribute to in Investigation 1?

Hypothetically, if lime water was used in Investigation 2, what would its milky appearance imply?

Based on the targeted outcomes in Investigation 1 and Investigation 2, why do scientists utilize living organisms in such research?

What conclusion can be drawn from the observation that lime water turns milky in Test Tube D of Investigation 3?

Why is it important to sterilize the equipment in Investigation 2 before setting up the experiment?

What effect does boiling the sugar solution have in Investigation 3 before setting up the experiment?

What is the purpose of setting up the apparatus with test tubes containing yeast and sugar solution in anaerobic conditions in Investigation 3?

Why was a control set up with boiled beans used in one of the investigations described in the text?

What does the brighter burning of the glowing splint in the control tube signify in one of the investigations?

What metabolic process results in the production of carbon dioxide during anaerobic cellular respiration?

In Investigation 2, why did the lime water remain clear in Test Tube B?

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