Which of the following reaction of glycolysis is irreversible

1. Glucose is converted to glucose 6-phosphate in the presence of the enzyme hexokinase.

2. Fructose 6-phosphate is converted to fructose 1,6-biphosphate in the presence of the enzyme phosphofructokinase.

3. Phosphoenolpyruvate is converted to pyruvate in the presence of the enzyme pyruvate kinase.

4. isomerization of glucose 6-phosphate to fructose 6-phosphate

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#Question id: 29464

#Unit 6. System Physiology – Plant

The auxin receptor is composed of two proteins

a. SCF complex component TIR1 

b. repressor protein AUX/IAA

c. repressor protein component TIR1 

d. SCF complex component AUX/IAA

Which of the following is correct

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#Question id: 11741

#Unit 6. System Physiology – Plant

phloem transport indicating the importance of long distance transport in plants, the experiments demonstrated that removal of a ring of bark around the trunk of a tree, which removes the phloem. What will be its effect?

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#Question id: 1025

#Unit 4. Cell Communication and Cell Signaling

Which molecules are associated with the cell wall of Gram-positive bacteria?

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#Question id: 32518

#Unit 1. Molecules and their Interaction Relevant to Biology

When the antibiotic valinomycin is added to actively respiring mitochondria

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#Question id: 5097

#Unit 5. Developmental Biology

The embryonic precursor to the human spinal cord is the ________.