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TLS Online TPP Program

#Question id: 3845

The replisome, which synthesizes DNA on both leading and lagging strands, always moves toward the replication fork. This must mean that:

#Unit 3. Fundamental Processes

  1. synthesis on the lagging strand requires that the strand fold back onto the replisome.

  2. synthesis on the lagging strand occurs in the 3'-to-5' direction, and synthesis on the leading strand occurs in the 5'-to-3' direction.

  3. synthesis on the leading strand occurs in the 3' to 5' direction, and synthesis on the lagging strand occurs in the 5'-to 3'-direction.

  4. DNA strands are lined up in the same direction, with 3' ends together and 5' ends together.

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TLS Online TPP Program

#Question id: 11058

#Unit 10. Ecological Principles

The pufferfish, a common marine fish, has extensive spines that extend outward when it swallows water, becoming several times its normal size. This is an example of what kind of defense against predation?
TLS Online TPP Program

#Question id: 11059

#Unit 7. System Physiology – Animal

A healthy, 45-year-old man is reading the newspaper. Which of the following muscles are used for quiet breathing?
TLS Online TPP Program

#Question id: 11060

#Unit 7. System Physiology – Animal

A healthy, 25-year-old medical student participates in a 10-km charity run for the American Heart Association. Which of the following muscles does the student use (contract) during expiration?
TLS Online TPP Program

#Question id: 11061

#Unit 7. System Physiology – Animal

The pleural pressure of a normal 56-year-old woman is approximately −5 cm H2O during resting conditions immediately before inspiration (i.e., at functional residual capacity). What is the pleural pressure (in cm H2O) during inspiration?
TLS Online TPP Program

#Question id: 11062

#Unit 7. System Physiology – Animal

The alveolar pressure of a normal 77-year-old woman is approximately 1 cm H2O during expiration. What is the alveolar pressure during inspiration (in cm H2O)?
TLS Online TPP Program

#Question id: 11063

#Unit 7. System Physiology – Animal

A man inspires 1000 ml from a spirometer. The intrapleural pressure was −4 cm H2O before inspiration and −12 cm H2O the end of inspiration. What is the compliance of the lungs?