Practice Questions

TLS Online TPP Program

#Question id: 3962

Which of the following is a difference between inducible versus repressible operons?

#Unit 3. Fundamental Processes

In an inducible operon, the ligand binds to the regulator protein.
In a repressible operon, the ligand-regulator complex binds to the operator.
In a repressible operon, all the structural gene products have related functions.
In an inducible operon, RNA polymerase binds to the promoter.

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TLS Online TPP Program

#Question id: 31397

#Unit 2. Cellular Organization

Which of following sorting signal, CFTR protein contains that binds to the Sec24 subunit of the COPII vesicle coat and is necessary for transport of the CFTR protein out of the ER?

TLS Online TPP Program

#Question id: 31401

#Unit 2. Cellular Organization

Following the production of membrane extracts using the non-ionic detergent Triton X-100, you analyze the membrane lysates via mass spectrometry and note a high content of cholesterol and sphingolipids. Furthermore, biochemical analysis of the lysates reveals potential kinase activity. What have you probably isolated?

TLS Online TPP Program

#Question id: 31417

#Unit 2. Cellular Organization

Put these events in the correct temporal order:

a. End plate potential (EPP)

b. Action potential in muscle fiber

c. ACh release from presynaptic terminal

e. Opening ligand-gated ion channels

f. Opening Ca²⁺ channels in presynaptic terminal

g. Binding of ACh to nicotinic receptors,

h. Action potential in nerve fiber

TLS Online TPP Program

#Question id: 2258

#Unit 2. Cellular Organization

The arrangement of microtubules in eukaryotic flagella is referred to as

TLS Online TPP Program

#Question id: 2259

#Unit 2. Cellular Organization

Which of the following is not a characteristic of prokaryotes?

TLS Online TPP Program

#Question id: 2260

#Unit 2. Cellular Organization

The term "nuclear envelope" is more correct than the term "nuclear membrane" because