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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?

#SCPH05 I Biotechnology

  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: 2333

#SCPH06 I Botany

Which portion of a phospholipid molecule is repelled by water?
TLS Online TPP Program

#Question id: 10961

#I Life Science/ Life Sciences Group – I-V

Over the past 12 weeks, a 75-year-old man with a moderate aortic stenosis has developed shortness of breath and chest pains during exertion. He appears pale. Test of his stool for blood is positive. Laboratory studies show the following: hemoglobin 7.2 g/dL, and mean corpuscular volume 75. A blood smear shows microcytic, hypochromic erythrocytes. Which of the following is the most likely diagnosis?
TLS Online TPP Program

#Question id: 1714

#SCPH01 Biochemistry

In a lymph node, the antigen pneumococcus polysaccharide SIII leads to:
TLS Online TPP Program

#Question id: 3256

#SCPH28 | Zoology

There are three alleles, A1, A2, and A3, whose frequencies are equal abundance. According the Hardy-Weinberg equilibrium
TLS Online TPP Program

#Question id: 20103

#SCPH05 I Biotechnology

Spontaneous adsorption of a gas on a solid surface is exothermic process because