TLS Online TPP Program

#Question id: 33377


The α helices of proteins have an average length of 

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. More than 3 helical turns, and a length of ∼18 A.
  2. More than 4 helical turns, and a length of ∼20 A
  3. More than 5 helical turns, and a length of ∼28 A
  4. More than 6 helical turns, and a length of ∼19 A
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TLS Online TPP Program

#Question id: 11582

#Unit 7. System Physiology – Animal

Following a stressful stimulus, the fight-or-flight response will cause ________.

TLS Online TPP Program

#Question id: 11583

#Unit 7. System Physiology – Animal

Use the figure to answer the following question.


In an experiment, rats' ovaries were removed immediately after impregnation, and then the rats were divided into two groups. Treatments and results are summarized in the table. The results most likely occurred because progesterone exerts an effect on the ________.

TLS Online TPP Program

#Question id: 11584

#Unit 7. System Physiology – Animal

Use the bar graph to answer the following question.

People who suffer from chronic fatigue syndrome (CFS) experience ongoing, debilitating fatigue. In one study, cortisol levels in the saliva during the first hour after waking were measured and compared between CFS patients and people without CFS (controls). The data is summarized in the graph. What can you infer from the data?

TLS Online TPP Program

#Question id: 11585

#Unit 7. System Physiology – Animal

Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractures. The more calcium in the bones, the better the bone density. Which of the following would produce the greatest increase in bone calcium levels?

TLS Online TPP Program

#Question id: 11586

#Unit 7. System Physiology – Animal

Predict the effects of a drug that increases adrenocorticotropic hormone (ACTH) synthesis.

TLS Online TPP Program

#Question id: 11587

#Unit 7. System Physiology – Animal

People experiencing chronic stress may be more likely to become sick because ________.