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TLS Online TPP Program

#Question id: 910

Experiments on denaturation and renaturation after the reduction and reoxidation of the —S—S— bonds in the enzyme ribonuclease (RNase) have shown that:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. folding of denatured RNase into the native, active conformation, requires the input of energy in the form of heat.

  2. native ribonuclease does not have a unique secondary and tertiary structure.

  3. the completely unfolded enzyme, with all —S—S— bonds broken, is still enzymatically active.

  4. the primary sequence of RNase is sufficient to determine its specific secondary and tertiary structure.

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TLS Online TPP Program

#Question id: 14754

#Unit 6. System Physiology – Plant

Plant cells have several internal compartments, each of which can differ in its ionic composition. The cytosol and the vacuole are the most important intracellular compartments that determine the ionic relations of plant cells, Ion concentrations in the cytosol and the vacuole are controlled by passive (dashed arrows) and active (solid arrows) transport processes
  

Which of the following statement INCORRECT from the above figure;
TLS Online TPP Program

#Question id: 19563

#Unit 12. Applied Biology

It was believed that lysis of epithelial cells leads to death of the affected larvae due to 
TLS Online TPP Program

#Question id: 34112

#Unit 2. Cellular Organization

A. When interphase nuclei are suspended in a solution of low ionic strength, they swell and rupture to release fibers of chromatin.
B. Individual nucleosomes can be obtained by treating chromatin with the endonuclease micrococcal nuclease
C. When chromatin is digested with MNase, the DNA is cleaved into integral multiples of a unit length can be Fractionated by gel electrophoresis reveals the “ladder”
D. With MNase more than 95% of nuclear DNA can be recovered in the form of the 200-bp ladder.

Choose true and false
TLS Online TPP Program

#Question id: 12997

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the given reason is correct to minimize the repulsion in an α-helix
a) positively charged amino acids are often found near the amino terminus of the helical segment
b) negatively charged amino acids are often found near the amino terminus of the helical segment
c) positively charged amino acids are often found near the C-terminus of the helical segment.
d) negatively charged amino acids are often found near the C-terminus of the helical segment.
TLS Online TPP Program

#Question id: 11586

#Unit 7. System Physiology – Animal

Predict the effects of a drug that increases adrenocorticotropic hormone (ACTH) synthesis.