Which the following statements is/are true about the stacking gel?

i. The stacking gel solution contains acrylamide.

ii. It is on the top of the separating gel.

iii. It is used to dilute the protein sample before it enters the main separating gel.

iv. It is into this gel that the wells are formed and the proteins loaded.

#Question id: 610

#Unit 1. Molecules and their Interaction Relevant to Biology

Protein A has four identical subunits, each of which binds one molecule of ligand Y. The binding of one molecule of Y to one of the subunits induces a conformational change in neighboring subunits that enhances the binding of additional units of Y. This is an example of________.

#Question id: 611

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement is false about the sequential theory of enzyme catalysis?

#Question id: 612

#Unit 1. Molecules and their Interaction Relevant to Biology

 The quaternary structure of hemoglobin changes from the T state to the R state ________.

#Question id: 613

#Unit 1. Molecules and their Interaction Relevant to Biology

Ethanol (CH3CH2OH) is the alcohol found in beverages. It is oxidized in the body to acetaldehyde by the enzyme alcohol dehydrogenase. Methanol (CH3OH), also known as wood alcohol, is converted to formaldehyde by the same enzyme. Acetaldehyde is toxic, but formaldehyde is far more toxic to humans, which is why the ingestion of relatively small amounts of methanol can cause blindness or death. One treatment for mild methanol poisoning is the administration of ethanol. Why might a doctor choose this treatment?

#Question id: 614

#Unit 1. Molecules and their Interaction Relevant to Biology

What type of inhibition is indicated by the data graphed below?

#Question id: 615

#Unit 1. Molecules and their Interaction Relevant to Biology

The following data were obtained in the presence and absence of inhibitor. What type of inhibition is shown?