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TLS Online TPP Program

#Question id: 2115

Which of the following statements about diffusion is true?

#Section 2: General Biology

  1. It is very rapid over long distances.

  2. It requires an expenditure of energy by the cell.

  3. It is an active process in which molecules move from a region of lower concentration to a region of higher concentration.

  4. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.

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TLS Online TPP Program

#Question id: 27166

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Calculate the percentage sequence identity for the pairwise alignment given below:

H E L L O _

H E E I O W
TLS Online TPP Program

#Question id: 3952

#Section 3: Genetics, Cellular and Molecular Biology

What kind of molecules must pass between the nucleus and the cytoplasm?
TLS Online TPP Program

#Question id: 1691

#Section 2: General Biology

What is the structure recognized by the αβ T-cell receptor on the cell surface of an antigen-presenting cell?
TLS Online TPP Program

#Question id: 18940

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

which of the following permits the amplification of chosen segments of DNA or RNA for detailed study or cloning.
TLS Online TPP Program

#Question id: 3881

#Section 3: Genetics, Cellular and Molecular Biology

Which one of the following statements about mRNA stability is true?