Ten people are sitting in a row. Their objective is to whisper a secret from one person to the next all the way down the row. The first person whispers the secret to the second person who passes the secret to the third person and so on. After whispering to the third person, the second person in the row notices the ninth person has fallen asleep in their chair, so she gets up, goes down the row and shakes person nine awake. This example is similar to ________.

#Question id: 608

#Unit 1. Molecules and their Interaction Relevant to Biology

The ʺTʺ state refers to the ________.

#Question id: 609

#Unit 1. Molecules and their Interaction Relevant to Biology

The ________ theory explains cooperative binding by suggesting all subunits of a given protein have the same conformation, either all R or all T.

#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?