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?

#Section 2: General Biology
  1. Either metabolite U or V is likely to be a positive modulator, increasing the activity of X.

  2. The first product S, is probably the primary negative modulator of X, leading to feedback inhibition.

  3. The last product, W, is likely to be a negative modulator of X, leading to feedback inhibition.

  4. The last product, W, is likely to be a positive modulator, increasing the activity of X.

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TLS Online TPP Program

#Question id: 1272

#Section 3: Genetics, Cellular and Molecular Biology

Collagen is exported from the endoplasmic reticulum as

TLS Online TPP Program

#Question id: 1274

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following are included as functions of the extracellular matrix?

a. supporting differentiation               b. synthesis of procollagen

c. binding growth hormones               d. filtering

TLS Online TPP Program

#Question id: 1275

#Section 3: Genetics, Cellular and Molecular Biology

The functions of the extracellular matrix include:

a. supporting differentiation.

b. inducing morphogenesis.

c. binding growth hormones.

d. repairing damaged tissue

which of the following combination is correct?

TLS Online TPP Program

#Question id: 1276

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following does not belong to the major families of cell surface adhesion molecules?

TLS Online TPP Program

#Question id: 1277

#Section 3: Genetics, Cellular and Molecular Biology

Cadherin cellular adhesion molecules promote:

TLS Online TPP Program

#Question id: 1279

#Section 3: Genetics, Cellular and Molecular Biology

A tight junction is made up of which of the following proteins?

a. tricellulin                                                     b. occludin

c. claudin                                                         d. connexins