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TLS Online TPP Program

#Question id: 495

The main function of the pentose phosphate pathway is to:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. give the cell an alternative pathway should glycolysis fail.

  2. provide a mechanism for the utilization of the carbon skeletons of excess amino acids.

  3. supply energy.

  4. supply pentoses and NADPH.

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TLS Online TPP Program

#Question id: 34165

#Unit 7. System Physiology – Animal

Following statements are regarding thyroid hormone biosynthesis?
I. The basolateral membranes of thyrocytes facing the capillaries contain a antiporter that transports two Na+ ions and one I– ion into the cell with each cycle, against the electrochemical gradient for I–.
II. Na+/I– symporter (NIS) is capable of producing intracellular I– concentrations that are 20–40 times as great as the concentration in plasma.
III. TSH induces both NIS expression and the retention of NIS in the basolateral membrane, where it can mediate sustained iodide uptake.
TLS Online TPP Program

#Question id: 10304

#Unit 6. System Physiology – Plant

Pyruvate is coverted into the Acetyl-CoA, Acetyl-CoA contain the acetyl group which are comes from the pyruvate and Coenzyme A (CoA) that contain other groups such as;

a) A reactive thiol (—SH) group that is critical to the role of CoA as an acyl carrier in a number of metabolic reactions

b) contain pantothenic acid,  A hydroxyl group of pantothenic acid is joined to a modified ADP moiety by a phosphate ester bond

c) pantothenic acid carboxyl group is attached to β-mercaptoethylamine in amide linkage

d) Hydroxyl group at the 3’ position of the ADP moiety has a phosphoryl group not present in free ADP

which of the following correct observation about Coenzyme A (CoA)?
TLS Online TPP Program

#Question id: 2566

#Unit 2. Cellular Organization

An inhibitor of which of the following enzymes could be used to block the release of calcium from the endoplasmic reticulum?
TLS Online TPP Program

#Question id: 9178

#Unit 9. Diversity of Life Forms

A fish swimming into an estuary from a river would have which of the following as its greatest physiological challenge?
TLS Online TPP Program

#Question id: 19225

#Unit 12. Applied Biology

Modification of the tissue culture conditions by the inclusion of ________ during transformation of grape, rice, corn, or soybean has been found to increase the transformation frequencies of those plant cells.