Practice Questions

TLS Online TPP Program

#Question id: 9219

If the sex ratio in a population is significantly different from 50:50, then which of the following statements will always be accurate?

#Unit 9. Diversity of Life Forms

The population will enter the extinction vortex.
The genetic variation in the population will increase over time.
Modeling of the minimum viable population size will underestimate the actual population size.
The effective population size will be less than the actual population size.

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TLS Online TPP Program

#Question id: 657

#Unit 1. Molecules and their Interaction Relevant to Biology

Structural proteins that typically assemble into large cables or threads to provide mechanical support to cells or organisms are classified as ________ proteins.

TLS Online TPP Program

#Question id: 24166

#General Aptitude

The term spices is a pleasant one, whether it connotes fine French cuisine or a down-home, cinnamon-flavored apple pie. ____________. In the past, individuals traveled the world seeking exotic spices for profit and, in searching, have changed the course of history. Indeed, to gain control of lands harboring new spices, nations have actually gone to war.

TLS Online TPP Program

#Question id: 295

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of amino acids could form a covalent disulfide bond to link two polypeptides together in a multi-subunit protein complex

TLS Online TPP Program

#Question id: 12060

#Unit 7. System Physiology – Animal

Eating a meal leads to a large increase in gastric acid secretion that peaks within about 5 min and returns to normal about 4 hr after a meal is taken. How long after a meal does the pH of the gastric contents reach its lowest level (in hours)?