This set of Plant Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Respiration”.
1. Who first discovered the process of respiration in plants?
a) Nehemiah Grew
b) Marcello Malpighi
c) Jan Ingenhousz
d) Robert Hooke
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Explanation: Jan Ingenhousz, a physician from Netherlands, first discovered the process of respiration in plants. He revealed in his experiments that sunlight is essential for plants to absorb carbon dioxide and to release out oxygen through the process of photosynthesis.
2. Which of the following equation correctly represents the process of respiration?
a) C6H12O6 + 6O2 → 6CO2 + 6H2O + 36 ATP
b) C6H12O6 + 6O2 → 6CO2 + 6H2O + 34 ATP
c) C6H12O6 + 6O2 → 6CO2 + 6H2O + 32 ATP
d) C6H12O6 + 6O2 → 6CO2 + 6H2O + 30 ATP
View Answer
Explanation: The process of respiration can be given by the equation
C6H12O6 + 6O2 → 6CO2 + 6H2O + 32 ATP
The glucose is converted into energy in the form of 32 ATP molecules, which is then utilized by the plants for further metabolism.
3. In which cell organelle does aerobic respiration takes place?
a) Cytoplasm
b) Mitochondria
c) Lysozyme
d) Endoplasmic reticulum
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Explanation: Mitochondria is the site of action for aerobic respiration process, where, the complete oxidation of pyruvate occurs, leaving only three molecules of CO2. And consequently, within the inner membranes of mitochondria, ATP is synthesized.
4. In which organelle does anaerobic respiration takes place?
a) Cytoplasm
b) Mitochondria
c) Lysozyme
d) Endoplasmic reticulum
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Explanation: The process of anaerobic respiration is characterized in eukaryotic organisms. The site of action for this mode of respiration is cytoplasm. During the Anaerobic respiration process, cellular energy is produced without the expense of oxygen.
5. What do you mean by glycolysis?
a) The breakdown of pyruvic acid to glucose
b) The breakdown of glucose to pyruvic acid
c) The breakdown of glucose to citric acid
d) The breakdown of citric acid to glucose
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Explanation: Glycolysis is an important cellular mechanism that primarily occurs in the cytoplasm of the cell. In this process, the glucose molecule undergoes partial oxidation to form two molecules of pyruvic acid, which then converted into pyruvate during citric acid cycle.
6. Where does respiration take place in woody plants?
a) Lenticles
b) Xylem tissues
c) Phloem tissue
d) Peripheral tissue
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Explanation: In woody stems and branches, the phenomenon of respiration takes place in lenticles. Lenticles are small pores that are found in trees and woody plants which allows gas exchange between the inner tissues and the atmosphere.
7. Which of the following is the correct definition for respiratory quotient (RQ)?
a) The ratio of volume of CO2 evolved to the volume of O2 consumed in respiration
b) The ratio of volume of O2 evolved to the volume of CO2 consumed in respiration
c) The ratio of volume of CO2 evolved to the volume of H2 consumed in respiration
d) The ratio of volume of O2 evolved to the volume of H2 consumed in respiration
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Explanation: The respiratory quotient (RQ) can be defined as the ratio between the volume of CO2 evolved and the volume of O2 consumed during respiration. The respiratory quotient mainly depends upon the type of respiratory substrate used.
8. Dark respiration only occurs in the absence of light.
a) True
b) False
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Explanation: The two major types of respiration that occurs in plants are photo respiration and dark respiration. Photorespiration occurs only in the presence of light whereas, dark respiration can take place in both presence as well as absence of light.
9. What is the full form of ETS?
a) Energy Transition System
b) Energy Transport System
c) Electron Transition System
d) Electron Transport System
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Explanation: ETS stands for Electron Transport System. It is one of the major components involved in the process of cellular respiration. The Electron Transport System comprises of a series of membrane-associated protein complexes. And it is considered to be the terminal oxidation phase.
10. Which of the following is not an example of respiratory substrate?
a) 3-Aminoglutarate
b) Glucose
c) Organic acids
d) Starch
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Explanation: Respiratory substrates are compounds that are oxidized during the respiration process. The most common example of respiratory substrates is the glucose. Other examples include proteins, lipids, organic as well as fatty acids.
11. How would you define a respiration process that uses only carbohydrates and fats as its substrate?
a) Glucose Respiration
b) Oxidized Respiration
c) Reduced Respiration
d) Floating Respiration
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Explanation: Floating Respiration is a type of cellular respiration process that uses biomolecules such as carbohydrates and fats as its respiratory reaction substrates. The Floating Respiration can also be termed as carbohydrate respiration.
12. Protoplasmic Respiration uses proteins as their respiratory substrates.
a) True
b) False
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Explanation: The given statement is correct. Respiration that consumes proteins as their respiratory substrate is called as protoplasmic respiration, whereas, floating respiration is the process which uses carbohydrates and fats as their respiratory substrates.
Sanfoundry Global Education & Learning Series – Plant Biotechnology.
To practice all areas of Plant Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
