TLS Online TPP Program

#Question id: 1295


What signal is released by endothelial cells to recruit circulating leukocytes?

#Unit 4. Cell Communication and Cell Signaling
  1. Vesicle-sequestered P-selectins are moved to the cell surface.

  2. Vesicle-sequestered αLβ2 molecules are moved to the cell surface.

  3. Integrins are cleaved from the plasma membrane so that the extracellular domain can bind leukocytes.

  4. Secreted glycoproteins trigger leukocytes to initiate “rolling” motility.

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TLS Online TPP Program

#Question id: 66

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements regarding isomerism is incorrect regarding biomolecules?

TLS Online TPP Program

#Question id: 67

#Unit 1. Molecules and their Interaction Relevant to Biology

When a region of DNA must be repaired by removing and replacing some of the nucleotides, what ensures that the new nucleotides are in the correct sequence?

TLS Online TPP Program

#Question id: 68

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following functional groups given in column I with their respective representatives given in column II.

COLUMN ICOLUMN II
1. Anhydridea. RCOOR
2. Etherb. ROCOCH3
3. Acetylc. ROR
4. Amidod. RCOOCOR
5. Estere. RCONH2

TLS Online TPP Program

#Question id: 68

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following functional groups given in column I with their respective representatives given in column II.

COLUMN ICOLUMN II
1. Anhydridea. RCOOR
2. Etherb. ROCOCH3
3. Acetylc. ROR
4. Amidod. RCOOCOR
5. Estere. RCONH2

TLS Online TPP Program

#Question id: 69

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the diastereomer of the following compound?

TLS Online TPP Program

#Question id: 70

#Unit 1. Molecules and their Interaction Relevant to Biology

The dimensions of living cells are limited, on the lower end by the minimum number of biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes such as oxygen. Except for highly elongated cells, they usually have lengths and diameters in the range of