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TLS Online TPP Program

#Question id: 613

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?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Ethanol must act as a competitive inhibitor for the alcohol dehydrogenase and therefore slows the formation of formaldehyde.

  2. Ethanol likely irreversibly binds to alcohol dehydrogenase which prevents the formation of formaldehyde.

  3. The ethanol is likely an uncompetitive inhibitor and binds to a site other than the active site of the enzyme.

  4. The doctor has given up on the patient and administers ethanol for sedation.

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TLS Online TPP Program

#Question id: 14840

#Unit 5. Developmental Biology

If a cell or tissue type is able to differentiate according to its specified fate, it is assumed that commitment is:
TLS Online TPP Program

#Question id: 14841

#Unit 5. Developmental Biology

How cells became different from one another during embryonic development?
TLS Online TPP Program

#Question id: 14842

#Unit 5. Developmental Biology

If a specified cell is transplanted to a population of differently specified cells, the fate of the transplant will be:
A. Altered if the specification is reversible
B. Capable of differentiating by itself if the specification is reversible
C. Altered if the specification is irreversible
D. Capable of differentiating by itself if the specification is irreversible
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 14843

#Unit 5. Developmental Biology

In both animals and plants, undifferentiated cells go through a process of maturation that begins when they become committed to a specific cell lineage.
   
Which of the following option represents correct events regarding to series

TLS Online TPP Program

#Question id: 14844

#Unit 13. Methods in Biology

An urn contains 25 balls numbered 1 through 25. Two balls are drawn from the urn with replacement. The probability of getting at least one odd is
TLS Online TPP Program

#Question id: 14845

#Unit 13. Methods in Biology

Four persons are chosen at random from a group containing 3 men, 2 women and 4 children. The chance that exactly 2 of them will be children is