TLS Online TPP Program

#Question id: 678


Which is not true about β-sheets?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. The side-chains of all amino acids point to the same side of the sheet.

  2. The polypeptide chains in the sheet are nearly fully extended.

  3. The range of allowed phi and psi angles is broader than for those in the α-helix.

  4. In antiparallel sheets the hydrogen bonds between adjacent strands are nearly perpendicular to the backbones of the strands.

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TLS Online TPP Program

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#Unit 7. System Physiology – Animal

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#Question id: 21240

#Unit 7. System Physiology – Animal

A visual exam in an 80-year-old man shows he has a reduced ability to see objects in the upper and lower quadrants of the left visual fields of both eyes but some vision remains in the central regions of the visual field. The diagnosis is

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#Question id: 21241

#Unit 7. System Physiology – Animal

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#Question id: 21242

#Unit 7. System Physiology – Animal

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TLS Online TPP Program

#Question id: 21243

#Unit 7. System Physiology – Animal

A 62-year-old Caucasian woman experienced a rapid onset of blurry vision along with loss of central vision. A comprehensive eye exam showed that she had wet age-related macular degeneration. The fovea of the eye

TLS Online TPP Program

#Question id: 21244

#Unit 7. System Physiology – Animal

Which of the following parts of the eye has the greatest concentration of rods?