Respiration in Plants NEET PYQ
1. This is an incorrect statement for Kreb’s cycle (NEET 2017)
A. There are three points in the cycle where NAD+ is reduced to NADH+ H+
B. The cycle starts with the condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
C. during the conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized
D. there is one point in the cycle where FAD+ is reduced to FADH2
Answer: B
2. This biomolecule is common to a respiration-mediated breakdown of fats, carbohydrates and proteins (NEET-II 2016)
A. Acetyl CoA
B. Pyruvic acid
C. fructose 1, 6-bi phosphate
D. Glucose-6-phosphate
Answer: A
3. This metabolite is common to respiration-mediated breakdown of fats, carbohydrates and proteins (NEET 2013)
A. Fructose 1, 6-bisphosphate
B. Glucose – 6 – phosphate
C. Acetyl CoA
D. Pyruvic acid
Answer: C
Respiration in Plants MCQ for NEET Pdf:
Here are the Respiration in Plants MCQ for NEET along with their answers and explanations regarding cellular respiration and related processes:
1. What does the term “cellular respiration” refer to?
a) The process of breathing in plants
b) The breakdown of glucose to release energy in cells
c) The transport of oxygen in blood
d) The exchange of gases in the lungs
Answer: b) The breakdown of glucose to release energy in cells
Explanation: Cellular respiration refers to the metabolic process in cells where glucose is oxidized to produce ATP (adenosine triphosphate), releasing energy for cellular activities.
2. Glycolysis is also known as ________
a) Citric acid cycle
b) Calvin cycle
c) Krebs cycle
d) Embden-Meyerhof pathway
Answer: d) Embden-Meyerhof pathway
Explanation: Glycolysis, also known as the Embden-Meyerhof pathway, is the initial step of cellular respiration where glucose is broken down into pyruvate, producing ATP and NADH.
3. Do plants breathe?
a) Yes, through photosynthesis
b) No, they do not require oxygen
c) Yes, through cellular respiration
d) No, they only exchange gases with the soil
Answer: c) Yes, through cellular respiration
Explanation: Plants perform cellular respiration to break down sugars and release energy, utilizing oxygen and producing carbon dioxide.
4. Which of the following structures are used by plants to exchange gases?
a) Stomata
b) Xylem vessels
c) Phloem tubes
d) Root hairs
Answer: a) Stomata
Explanation: Stomata are small openings on the surface of leaves and stems that allow for the exchange of gases (oxygen and carbon dioxide) between plants and the atmosphere.
5. The end product of oxidative phosphorylation is:
a) Pyruvate
b) Acetyl-CoA
c) ATP
d) Glucose
Answer: c) ATP
Explanation: Oxidative phosphorylation is the final stage of cellular respiration, where ATP is produced using the electron transport chain and ATP synthase.
6. What is the process of respiration in higher plants?
a) Glycolysis
b) Krebs cycle
c) Oxidative phosphorylation
d) Aerobic respiration
Answer: d) Aerobic respiration
Explanation: Higher plants perform aerobic respiration involving glycolysis, the Krebs cycle (citric acid cycle), and oxidative phosphorylation to produce ATP.
7. What do plants breathe in?
a) Oxygen (O2)
b) Carbon dioxide (CO2)
c) Nitrogen (N2)
d) Water vapor (H2O)
Answer: a) Oxygen (O2)
Explanation: Plants take in oxygen during respiration and release carbon dioxide as a byproduct.
8. How many ATP molecules are produced by aerobic oxidation of one molecule of glucose?
a) 2 ATP molecules
b) 4 ATP molecules
c) 36-38 ATP molecules
d) 72 ATP molecules
Answer: c) 36-38 ATP molecules
Explanation: Aerobic oxidation of glucose through cellular respiration can produce approximately 36-38 molecules of ATP.
9. The overall goal of glycolysis, Krebs cycle, and the electron transport system is the formation of:
a) Glucose
b) Pyruvate
c) ATP
d) NADH
Answer: c) ATP
Explanation: The main objective of these metabolic pathways is to produce ATP molecules for cellular energy.
10. The ultimate electron acceptor of respiration in an aerobic organism is:
a) Oxygen (O2)
b) Carbon dioxide (CO2)
c) Nitrogen (N2)
d) Water (H2O)
Answer: a) Oxygen (O2)
Explanation: Oxygen serves as the final electron acceptor in the electron transport chain of aerobic respiration, forming water (H2O) as a result.
11. This is an incorrect statement for Krebs cycle:
a) It takes place in the mitochondria
b) It generates ATP directly
c) It involves the oxidation of acetyl-CoA
d) It produces CO2 as a byproduct
Answer: b) It generates ATP directly
Explanation: The Krebs cycle (citric acid cycle) does not directly generate ATP but produces NADH and FADH2, which donate electrons to the electron transport chain for ATP synthesis.
12. Mitochondria are called powerhouses of the cell. Which of the following observations support this statement?
a) Mitochondria produce ATP through oxidative phosphorylation
b) Mitochondria contain enzymes for cellular respiration
c) Mitochondria have a double membrane structure
d) All of the above
Answer: d) All of the above
Explanation: Mitochondria are specialized organelles that play a key role in cellular respiration, producing ATP and containing enzymes for aerobic metabolism.