Practice Questions

TLS Online TPP Program

#Question id: 11560

Which of the following statements are correct?

I) Hormones often regulate homeostasis through antagonistic functions.

II) Hormones of the same chemical class usually have the same function.

III) Hormones are secreted by specialized cells usually located in exocrine glands.

IV) Hormones are often regulated through feedback loops.

#Unit 7. System Physiology – Animal

only II and III
only I and III
only III and IV
only I and IV

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TLS Online TPP Program

#Question id: 13192

#Unit 10. Ecological Principles

In the schematic below, the left panel represents climatic zones occupied by two different biomes, X and Y, along gradients of temperature and precipitation. The right panel depicts the expected species-area relationships of these two biomes. From the figures below, which of the following are most likely to be true?

TLS Online TPP Program

#Question id: 13193

#Unit 1. Molecules and their Interaction Relevant to Biology

Data, collected from DNAs of a great many different species, led Chargaff to the following conclusions:

A. The base composition of DNA generally varies from one species to another.

B. DNA specimens isolated from different tissues of the same species have the different base composition.

C. The base composition of DNA in a given species changes with an organism’s age, nutritional state, or changing environment.

D. In all cellular DNAs, the sum of the purine residues equals the sum of the pyrimidine residues.

Which of the above statements are INCORRECT regarding Chargaff’s rule?

TLS Online TPP Program

#Question id: 13194

#Unit 1. Molecules and their Interaction Relevant to Biology