Practice Questions

TLS Online TPP Program

#Question id: 626

A metabolic pathway proceeds according to the scheme, R -> S -> T -> U -> V -> W. A regulatory enzyme, X, catalyzes the first reaction in the pathway. Which of the following is most likely correct for this pathway?

#Unit 1. Structure and Function of Biomolecules

Either metabolite U or V is likely to be a positive modulator, increasing the activity of X.
The first product S, is probably the primary negative modulator of X, leading to feedback inhibition.
The last product, W, is likely to be a negative modulator of X, leading to feedback inhibition.
The last product, W, is likely to be a positive modulator, increasing the activity of X.

More Questions

TLS Online TPP Program

#Question id: 1975

#Unit 4. Cell Communication and Cell Signaling

Which of the following differentiates T cells and B cells?

TLS Online TPP Program

#Question id: 1976

#Unit 4. Cell Communication and Cell Signaling

The MHC is important in a T cellʹs ability to

TLS Online TPP Program

#Question id: 1977

#Unit 4. Cell Communication and Cell Signaling

A patient can produce antibodies against some bacterial pathogens, but he does not produce antibodies against viral infections. This is probably due to a disorder in which cells of the immune system?

TLS Online TPP Program

#Question id: 1978

#Unit 4. Cell Communication and Cell Signaling

In which of the following situations will helper T cells be activated?

TLS Online TPP Program

#Question id: 1979

#Unit 4. Cell Communication and Cell Signaling

An immunoglobulin (Ig) molecule, of whatever class, has regions symbolized as C or V, H or L. A light chain has which of these regions?

TLS Online TPP Program

#Question id: 1980

#Unit 4. Cell Communication and Cell Signaling

For one person to produce over a million different antibody molecules could not possibly require over a million different genes. Instead, this variability is accounted for by which processes?