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TLS Online TPP Program

#Question id: 338

What is the difference between covalent bonds and ionic bonds?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Covalent bonds involve the sharing of pairs of electrons between atoms; ionic bonds involve the sharing of single electrons between atoms.

  2. Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between charged atoms.

  3. Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the sharing of protons between charged atoms.

  4. Covalent bonds involve the transfer of electrons between charged atoms; ionic bonds involve the sharing of electrons between atoms.

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TLS Online TPP Program

#Question id: 14993

#Unit 4. Cell Communication and Cell Signaling

CD-56 marker found on ?
TLS Online TPP Program

#Question id: 14994

#Unit 4. Cell Communication and Cell Signaling

The absence of MHC class I, which is expressed by almost all normal cells, but is specifically down-regulated by some tumors and in response to some viral infections, it will undergo apoptosis by
TLS Online TPP Program

#Question id: 14995

#Unit 4. Cell Communication and Cell Signaling

NKT Cells, which share features with both conventional T lymphocytes and NK cells,
Statement-I) Like T-cells, NKT Cells have T-cell receptors (TCRs), and some express CD4.
Statement-II) Like NK cells, NKT Cells have antibody receptors  
Statements-III) they are APCs
Given above statements, which is sharing correct features of NKT cells?
TLS Online TPP Program

#Question id: 14996

#Unit 8. Inheritance Biology

Which of the following most accurately restates Mendel's law of segregation?
TLS Online TPP Program

#Question id: 14997

#Unit 8. Inheritance Biology

You capture several interesting insects from a population in your yard. By inbreeding, you develop true breeding strains that differ only in the shape of their wings - one strain has round wings while the other strain has oval wings. How might you demonstrate that Mendel's principles apply to your insects?
TLS Online TPP Program

#Question id: 14998

#Unit 8. Inheritance Biology

You set up a monohybrid cross between true breeding round winged and true breeding oval winged insects. Your F1 offspring have round wings, and you collect the following numbers of F2: Round wings: 302; Oval wings: 86. Which of the following statements is NOT correct?