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TLS Online TPP Program

#Question id: 2001

A researcher is analyzing the immune response of a patient following the patientʹs exposure to an unknown agent while out of the country. The patientʹs blood is found to have a high proportion of lymphocytes with CD8 surface proteins. What is the likely cause?

#Section 2: General Biology

  1. The patient encountered a bacterial infection which elicited CD8 marked T cells.

  2. The disease must have been caused by a multicellular parasite, such as can be encountered in polluted water sources.

  3. The CD8 proteins would be discharged from these lymphocytes to lyse the infected cells.

  4. The CD8 proteins marked the surfaces of cytotoxic T cells to attack virus-infected host cells.

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TLS Online TPP Program

#Question id: 239

#Section 2: General Biology

ATP is not a nucleoside because it ________.
TLS Online TPP Program

#Question id: 241

#Section 2: General Biology

In DNA, phosphodiester bonds form with hydroxyl groups of carbons number ________ and ________ of each deoxyribose sugar.
TLS Online TPP Program

#Question id: 243

#Section 2: General Biology

Deoxythymidine is a ________ found mainly in DNA.
TLS Online TPP Program

#Question id: 244

#Section 2: General Biology

The difference between dGMP and GMP is
TLS Online TPP Program

#Question id: 245

#Section 2: General Biology

Adenylate and AMP each contain ________ phosphate groups.
TLS Online TPP Program

#Question id: 249

#Section 2: General Biology

According to Chargaffʹs observations of nucleotide composition of DNA samples, which of the following options are correct
A) % of (G + C) + % of (A + T) = 100%.
B) A = T.
C) G = C.
D) %A + %C + %T = 100%.