Question 16
Compared to aerobic respiration, anaerobic respiration
a
does not produce as much ATP and comes into action as an energy backup for aerobic organisms.
b
produces 38 ATP molecules per reaction and generates 70% more energy.
c
does not require oxygen and produces oxygen and glucose as forms of stored energy that are utilized by the cell.
d
requires oxygen and can produce products such as lactic acid or alcohol.
Question 17
Why is anaerobic respiration considered less efficient than aerobic respiration?
a
More oxygen is required for anaerobic respiration than for aerobic respiration.
b
More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
c
Less energy is required during anaerobic respiration than aerobic respiration.
d
Less lactic acid is formed during anaerobic respiration than during aerobic respiration.
Question 18
Why is anaerobic respiration considered less efficient than aerobic respiration?
a
More oxygen is required for anaerobic respiration than for aerobic respiration.
b
More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
c
Less lactic acid is formed during anaerobic respiration than during aerobic respiration.
d
Less energy is required during anaerobic respiration than aerobic respiration.
Question 19
Photosynthesis and cellular respiration both involve the use and release of gases. Which statement correctly identifies the role of gases in the two processes?
a
Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
b
Photosynthesis and cellular respiration both use carbon dioxide and release oxygen.
c
Photosynthesis and cellular respiration both use oxygen and release carbon dioxide.
d
Cellular respiration uses carbon dioxide and releases oxygen, while photosynthesis uses oxygen and releases carbon dioxide.
Question 20
Lucy sets up an investigation by placing a plastic bag over a plant. She secures the plastic bag so that it is completely sealed and nothing can enter. She observes the plant daily to see if it remains green and healthy.
Which TWO questions is her investigation designed to answer?
a
Can the plant perform photosynthesis faster than a plant that is not sealed?
b
Can the plant perform respiration without a large supply of oxygen?
c
Can the plant perform respiration without a large supply of carbon dioxide?
d
Can the plant perform photosynthesis without a large supply of carbon dioxide?
e
Can the plant perform respiration faster than a plant that is not sealed?
f
Can the plant perform photosynthesis without a large supply of oxygen?
Question 21
An important step in cellular respiration is
a
the breakdown of carbon dioxide.
b
the breakdown of glucose.
c
the creation of oxygen.
d
the creation of phosphate.
Question 22
The Krebs cycle produces electron carrier molecules. Where do these carrier molecules deliver the electrons produced in the Krebs cycle?
a
glycolysis
b
alcohol fermentation
c
the electron transport chain
d
lactic acid fermentation
Question 23
Look at the graph below.
Image
According to the graph, at which temperature do the two enzymes have about the same amount of activity?
a
25° C
b
47° C
c
57° C
d
93° C
Question 24
Use the diagram below to answer the question.
Image
The diagram shows a beaker of water and molecules of red dye at the beginning of an experiment (Time 1) and the same beaker of water and molecules of red dye after 30 minutes (Time 2). Which of the following best explains what happened?
a
Molecules of red dye moved by active transport from a higher concentration to a lower concentration.
b
Molecules of water moved by active transport from a higher concentration to a lower concentration.
c
Molecules of red dye moved by diffusion from a higher concentration to a lower concentration.
d
Molecules of water moved by osmosis from a lower concentration to a higher concentration.
Question 16: a) does not produce as much ATP and comes into action as an energy backup for aerobic organisms.
Question 17: b) More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
Question 18: b) More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
Question 19: a) Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
Question 20: b) Can the plant perform respiration without a large supply of oxygen? and c) Can the plant perform respiration without a large supply of carbon dioxide?
Question 21: b) the breakdown of glucose.
Question 22: c) the electron transport chain.
Question 23: c) 57° C
Question 24: c) Molecules of red dye moved by diffusion from a higher concentration to a lower concentration.
Question 16
- Compared to aerobic respiration, anaerobic respiration does not produce as much ATP and comes into action as an energy backup for aerobic organisms.
Question 17
- Anaerobic respiration is considered less efficient than aerobic respiration because more ATP molecules are gained in aerobic respiration than in anaerobic respiration.
Question 18
- Anaerobic respiration is considered less efficient than aerobic respiration because more ATP molecules are gained in aerobic respiration than in anaerobic respiration.
Question 19
- The correct statement is: Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
Question 20
- The investigation is designed to answer the questions:
1. Can the plant perform photosynthesis without a large supply of carbon dioxide?
2. Can the plant perform respiration without a large supply of oxygen?
Question 21
- An important step in cellular respiration is the breakdown of glucose.
Question 22
- The electron carrier molecules produced in the Krebs cycle deliver the electrons to the electron transport chain.
Question 23
- According to the graph, the two enzymes have about the same amount of activity at 57°C.
Question 24
- The best explanation for what happened in the experiment is that molecules of red dye moved by diffusion from a higher concentration to a lower concentration.
Question 16:
The answer is a) does not produce as much ATP and comes into action as an energy backup for aerobic organisms.
To arrive at this answer, you need to understand the differences between aerobic and anaerobic respiration. Aerobic respiration occurs in the presence of oxygen and is more efficient, producing a larger amount of ATP (energy) for the cell. Anaerobic respiration, on the other hand, occurs in the absence of oxygen and is less efficient, producing a smaller amount of ATP. Anaerobic respiration typically comes into action when oxygen is limited, acting as an emergency backup for aerobic organisms.
Question 17:
The answer is b) More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
To answer this question, you need to recall that aerobic respiration is more efficient than anaerobic respiration. Aerobic respiration produces a larger amount of ATP (energy) compared to anaerobic respiration, making it a more efficient process overall.
Question 18:
The answer is b) More ATP molecules are gained in aerobic respiration than in anaerobic respiration.
This is the same question as question 17 and has the same answer. Aerobic respiration is more efficient and produces more ATP compared to anaerobic respiration.
Question 19:
The answer is a) Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
To answer this question, you need to understand the roles of gases in cellular respiration and photosynthesis. During cellular respiration, cells use oxygen and release carbon dioxide as a byproduct. On the other hand, during photosynthesis, plants use carbon dioxide and release oxygen as a byproduct. This exchange of gases is essential for both processes to occur.
Question 20:
The answer is a) Can the plant perform photosynthesis faster than a plant that is not sealed? and e) Can the plant perform respiration faster than a plant that is not sealed?
To determine the correct answer, you need to analyze the purpose of Lucy's investigation. By sealing the plant in a plastic bag, Lucy wants to observe if the plant can perform photosynthesis and respiration without a supply of gases from the outside. Therefore, her investigation is designed to answer the questions of whether the plant can perform photosynthesis and respiration without a large supply of carbon dioxide and oxygen, respectively.
Question 21:
The answer is b) The breakdown of glucose.
Cellular respiration is the process by which cells break down glucose molecules to produce ATP (energy). The breakdown of glucose is an important step in cellular respiration, enabling the release of energy stored in the glucose molecule.
Question 22:
The answer is c) The electron transport chain.
In the Krebs cycle (also known as the citric acid cycle or TCA cycle), electron carrier molecules such as NADH and FADH2 are generated. These carrier molecules then transfer the electrons they carry to the electron transport chain, where ATP is produced through a series of redox reactions.
Question 23:
The answer is a) 25°C.
To answer this question, you need to analyze the graph and determine at which temperature the activity of the two enzymes is the same. From the graph, it can be observed that the two enzymes have the same activity at approximately 25°C.
Question 24:
The answer is c) Molecules of red dye moved by diffusion from a higher concentration to a lower concentration.
To understand what happened in the experiment, you need to analyze the diagram. The movement of molecules from a higher concentration to a lower concentration is a characteristic of diffusion. In this case, the molecules of red dye dispersed evenly throughout the beaker of water due to diffusion.