Practice free Respiration (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Glycolysis is found in cytoplasm of virtually all types of aerobic/anaerobic cells. In this process, glucose is converted into :
(c) : In glycolysis one molecule of hexose sugar (glucose/fructose), a 6C-compound is splitted to form
two molecules of a 3C-compound, pyruvic acid (CH3COCOOH).
Which of the following is the connecting link between glycolysis and Krebs cycle?
(a) : Glycolysis is the first step of respiration in which glucose is broken down to pyruvate. During glycolysis 1 molecule of glucose is converted to 2 molecule of pyruvic acid in the cytoplasm. These two molecule of pyruvic acid is the converted to acetyl CoA by decarboxylation. This acetyl CoA is the connecting link betwwen glycolysis and Krebs' cycle and functions as substrate entrant for Krebs' cycle. Acetyl CoA thus formed participates in Krebs' cycle and combines with oxaloacetic acid to form citrate.
The enzyme decarboxylase catalyses the following step
(c): Oxalosuccinate is decarboxylated to form α-ketoglutarate through the enzyme decarboxylase. It is one of the step involved in Krebs' cycle. It releases one molecule of CO2.
Which enyme helps in transfer of phosphate group from ATP to carbohydrate?
Transfer of phosphate group from ATP to a carbohydrate is referred to as phosphorylation and is carried out in presence of phosphorylase enzymes. E.g., glucose (a carbohydrate) is phosphorylated to glucose-6-phosphate by ATP in the presence of enzyme hexokinase or glucokinase and Mg2+ .
Which one is correct sequence occuring in glycolysis?
(b) The correct sequence of glycolysis is as following
Glucose-6-Phosphate 3-Phosphoglyceraldehyde 3-Phosphoglyceric acid Phosphoenol
pyruvate Pyruvic acid
In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?
(C) In glycolysis, water molecule is removed during conversion of 2-phosphoglycerate to phosphoenol pyruvate.
Aerobic respiration produces more usable chemical energy than fermentation, because fermentation involves
During aerobic respiration, complete oxidation of food takes place. Thus, during it a glucose molecule produces 36 ATP while during fermentation the food oxidises partially and instead of CO2 + H2O, formation of ethyl alcohol takes place with production of 2 ATP per glucose molecule.
RQ (Respiratory Quotient) is defined as
(c) The ratio of CO2 formed and O2 utilised during complete combustion of fuel substances is called respiratory quotient. RQ can be measured by Ganong's respirometer.
RQ =
The colour in the brown fat is due is
(c) Brown colour is due to iron containing cytochrome pigment in fat. The adipose cells of brown fat are multilocular, each cell with several small fat globules. It is loaded with a large number of mitochondria.
Found in hibernating mammals such as rats other rodents, etc.
What is the correct order of the stages of cellular respiration ?
The correct order of stages of cellular respiration are
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