The Respiration Quiz: How Much You Know?

2.

What is the molecule that respiration is responsible for producing?

NAD
FAD
ADP
ATP

Correct Answer

A. ATP

Explanation

Respiration is the process by which cells convert nutrients into usable energy. ATP (adenosine triphosphate) is the molecule that is produced during respiration and serves as the primary energy currency of the cell. It is responsible for storing and releasing energy for various cellular processes. NAD, FAD, and ADP are also involved in cellular respiration, but they do not directly produce energy like ATP does.

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3.

Which muscle separates the thoracic cavity from the abdominal cavity?

Phrenic muscle
Diaphragm
Intercostals
Pectorals

Correct Answer

A. Diaphragm

Explanation

The diaphragm is a dome-shaped muscle that separates the thoracic cavity from the abdominal cavity. It plays a crucial role in respiration by contracting and relaxing to control the volume of the thoracic cavity, allowing for the expansion and contraction of the lungs. This muscle is located at the base of the ribcage and is the main muscle responsible for breathing.

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4.

Hydrogencarbonate indicator is sensitive to changes in

Oxygen
Ethanol
Lactic acid
Carbon dioxide

Correct Answer

A. Carbon dioxide

Explanation

Hydrogencarbonate indicator is sensitive to changes in carbon dioxide. This is because carbon dioxide can react with water to form carbonic acid, which then dissociates into bicarbonate ions. The presence of carbon dioxide increases the concentration of bicarbonate ions, causing the hydrogencarbonate indicator to change color. Therefore, the indicator can be used to detect the presence or absence of carbon dioxide in a solution.

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5.

The site of aerobic respiration in the cell is the

Ribosome
Cytoplasm
Nucleus
Mitochondria

Correct Answer

A. Mitochondria

Explanation

The mitochondria is the site of aerobic respiration in the cell. Aerobic respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water. This process occurs in the mitochondria, which are often referred to as the "powerhouses" of the cell. The mitochondria have an inner membrane that contains enzymes necessary for the various steps of aerobic respiration, including the Krebs cycle and the electron transport chain. These processes generate ATP, the energy currency of the cell. Therefore, the mitochondria play a crucial role in producing energy for cellular activities.

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6.

The site of anaerobic respiration in the cells is

Cytoplasm
Mitochondria
Nucleus
Ribosome

Correct Answer

A. Cytoplasm

Explanation

Anaerobic respiration is a process that occurs in the absence of oxygen. It takes place in the cytoplasm of the cell. The cytoplasm is a gel-like substance that fills the cell and contains various organelles, including the mitochondria, nucleus, and ribosomes. However, anaerobic respiration does not occur in the mitochondria, nucleus, or ribosomes. Instead, it occurs in the cytoplasm where glucose is broken down into smaller molecules to release energy. Therefore, the correct answer is cytoplasm.

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7.

Mammals and birds have a fixed body temperature this means they generate heat from the food they eat to maintain the fixed body temperature.

True
False

Correct Answer

A. True

Explanation

Mammals and birds have a fixed body temperature because they are endothermic, meaning they can internally regulate their body temperature. This is achieved by generating heat through metabolic processes, specifically by breaking down the food they eat. This allows them to maintain a constant body temperature regardless of the external environment. Therefore, the statement that mammals and birds have a fixed body temperature and generate heat from the food they eat to maintain it is true.

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8.

Birds and mammals carry out ethanol fermentation when they respire anaerobically.

True
False

Correct Answer

A. False

Explanation

Birds and mammals do not carry out ethanol fermentation when they respire anaerobically. Ethanol fermentation is a process that occurs in some microorganisms, such as yeast, when they respire anaerobically. In birds and mammals, anaerobic respiration leads to the production of lactic acid, not ethanol. Therefore, the statement is false.

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9.

Which are the structures associated with gas exchange in a leaf?

Upper epidermis
Palisade mesophyll
Spongy mesophyll
Guard cell
Lower epidermis
Stomata
Waxy cuticle

Correct Answer(s)

A. Palisade mesophyll
A. Spongy mesophyll
A. Guard cell
A. Stomata

Explanation

The structures associated with gas exchange in a leaf are stomata, guard cells, palisade mesophyll, and spongy mesophyll. Stomata are small openings on the leaf surface that allow gases to enter and exit the leaf. Guard cells surround the stomata and control their opening and closing. Palisade mesophyll is a layer of cells in the upper part of the leaf that contains chloroplasts and is responsible for photosynthesis. Spongy mesophyll is a layer of loosely packed cells in the lower part of the leaf that allows for gas exchange.

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10.

The compensation point occurs:

When the rate of carbon dioxide production in photosynthesis matches the rate of oxygen production in respiration
When the rate of carbon dioxide production in respiration matches the rate of oxygen production during photosynthesis
Under low light intensity when the rate of photosynthesis is low
When no new biomass is being generated as any carbon containing compound is being used in respiration

Correct Answer(s)

A. When the rate of carbon dioxide production in respiration matches the rate of oxygen production during photosynthesis
A. Under low light intensity when the rate of photosynthesis is low
A. When no new biomass is being generated as any carbon containing compound is being used in respiration

Explanation

The compensation point occurs when the rate of carbon dioxide production in respiration matches the rate of oxygen production during photosynthesis. This means that the amount of carbon dioxide being produced by respiration is being consumed by photosynthesis at the same rate, resulting in no net change in the concentration of carbon dioxide in the environment. Under low light intensity, the rate of photosynthesis is low, which can lead to the compensation point being reached. Additionally, when no new biomass is being generated and any carbon-containing compound is being used in respiration, the compensation point can also be reached.

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The Respiration Quiz: How Much You Know?

Which form of respiration does not release carbon dioxide?

Quiz Preview

What is the molecule that respiration is responsible for producing?

Which muscle separates the thoracic cavity from the abdominal cavity?

Hydrogencarbonate indicator is sensitive to changes in

The site of aerobic respiration in the cell is the

The site of anaerobic respiration in the cells is

Mammals and birds have a fixed body temperature this means they generate heat from the food they eat to maintain the fixed body temperature.

Birds and mammals carry out ethanol fermentation when they respire anaerobically.

Which are the structures associated with gas exchange in a leaf?

The compensation point occurs: