Practice Questions

TLS Online TPP Program

#Question id: 12462

For most terrestrial ecosystems, pyramids of numbers, biomass, and energy are essentially the same-they have a broad base and a narrow top. The primary reason for this pattern is that

#Unit 10. Ecological Principles

Secondary consumers and top carnivores require less energy than producers.
At each step, energy is lost from the system as a result of keeping the organisms alive.
As matter passes through ecosystems, some of it is lost to the environment.
Biomagnification of toxic materials limits the secondary consumers and top carnivores.

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TLS Online TPP Program

#Question id: 32247

#Unit 2. Cellular Organization

Where do the vesicular tubular clusters arriving at the CGN originate from?

TLS Online TPP Program

#Question id: 32248

#Unit 2. Cellular Organization

The basis for different binding affinity between the KDEL receptor and the KDEL sequence in the ER & golgi is due to:

a. the lower pH in the Golgi

b. the higher pH in the Golgi

c. the lower pH in the ER

d. the higher pH in the ER

TLS Online TPP Program

#Question id: 32249

#Unit 2. Cellular Organization

Soluble ER-resident proteins contain which sorting signal that allows them to be retrieved?

TLS Online TPP Program

#Question id: 32250

#Unit 2. Cellular Organization

All the Golgi glycosidases and glycosyl transferases are:

TLS Online TPP Program

#Question id: 32251

#Unit 2. Cellular Organization

Which of the following protein form a scaffold between adjacent cisternae and give the Golgi stack its structural integrity?

TLS Online TPP Program

#Question id: 32252

#Unit 2. Cellular Organization

In which of the following organelles membrane proteins are highly glycosylated in compared to other organelles, which helps to protect them from the proteases?