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TLS Online TPP Program

#Question id: 671

Which was a major scientific accomplishment by Linus Pauling?

#Unit 1. Structure and Function of Biomolecules

  1. Determined the α-helix structure in keratin.

  2. Discovered β-strands and described their assembly into sheets.

  3. Determined the three-dimensional structure of hemoglobin and myoglobin.

  4. Determined the structure of penicillin.

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TLS Online TPP Program

#Question id: 5089

#Unit 5. Developmental Biology

The archenteron of the developing sea urchin eventually develops into the ________.
TLS Online TPP Program

#Question id: 5090

#Unit 5. Developmental Biology

Which of the following is a correct description of the fate of the germ layers?
TLS Online TPP Program

#Question id: 5091

#Unit 5. Developmental Biology

In all vertebrate animals, development requires ________.
TLS Online TPP Program

#Question id: 5092

#Unit 5. Developmental Biology

The least amount of yolk would be found in the egg of a ________.
TLS Online TPP Program

#Question id: 5093

#Unit 5. Developmental Biology

Which of the following is a result of gastrulation in animals?

I) The archenteron is formed.

II) The body axes are established.

III) The germ layers are formed.
TLS Online TPP Program

#Question id: 5094

#Unit 5. Developmental Biology

Cell migration occurs extensively during ________.