WorksheetsRespiration in Plants
Total questions: 15
Worksheet time: 9mins
During prolonged fastings, in what sequence are the following organic compounds used up by the body ?
First carbohydrates, next fats and lastly proteins
First fats, next carbohydrates and lastly proteins
First carbohydrates, next proteins and lastly lipids
First proteins, next lipids and lastly carbohydrates
Under which condition would you expect the mitochondrial proton gradient to be highest and therefore ATP synthesis to proceed?
pyruvate (present)-oxygen (present)-ATP levels (high)
pyruvate (present)-oxygen (present)-ATP levels (low)
pyruvate (absent)-oxygen (present)-ATP levels (low)
pyruvate (present)-oxygen (absent)-ATP levels (high)
Plants can get along without respiratory organs because of all the following except:
Each plant part takes care of its own gas exchange needs
Rate of respiration in root, stem, leaves is very low, hence no great demands for gas exchange
Gas diffusion in plants occurs easily over long distances in plants
Each living cell in a plant is located quite close to the surface of plant
Sucrose is converted into glucose and fructose. The enzyme which facilitates this reaction is called :
Zymase
Maltase
Invertase
Isomerase
Which of the following statements is incorrect?
During aerobic respiration, role of oxygen is limited to the terminal stage.
In ETC one molecule of NADH+H+gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.
ATP is synthesized through complex V
Oxidation-reduction reactions produce proton gradient in respiration.
The number of substrate level phosphorylations in one turn of citric acid cycle is
One
Two
Three
Zero
Pyruvate dehydrogenase activity during aerobic respiration requires:
Calcium
Iron
Cobalt
Magnesium
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by :
Enolase
Phosphofructokinase
Aldolase
Hexokinase
Respiratory Quotient (RQ) value of tripalmitin is
0.9
0.7
0.07
0.09
What is the role of NAD+ in cellular respiration?
It is the final electron acceptor for anaerobic respiration.
It functions as an enzyme.
It is a nucleotide source for ATP synthesis.
It functions as an electron carrier.
Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition it forms
CO2 + H2O
Lactic acid
CO2
Acetyl CoA + CO2
Which of the following is the energy yielding step of glycolysis?
Glucose → Glucose-6-phosphate
BPGA → PGA
Fructose-1,6-biphosphate → PGAL
Phosphoenolpyruvate→Pyruvate
In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?
Glucose → Glucose-6-phosphate
Fructose-6-phosphate → Fructose-1,6 bisphosphate
2-phosphoglycerate → Phosphoenolpyruvate
Phosphoenolpyruvate → Pyruvate
For the synthesis of Fatty acids, which of the following substrates will be used?
Acetyl CoA
PGAL
BPGA
Pyruvic Acid
Which of the following biomolecules is common to respiration mediated breakdown of fats, carbohydrates and proteins?
Pyruvic Acid
Acetyl-CoA
Glucose-6-Phosphate
Fructose-1,6-Bisphosphate
