TLS Online TPP Program

#Question id: 762


Regarding the sugar residues in nucleic acids, which, if any, of the following statements is incorrect?

#SCPH05 I Biotechnology
  1. The sugar is always based on a heterocyclic ring that consists of one oxygen atom and four carbon atoms, one of which is connected to a fifth carbon atom, the 5’ carbon atom.

  2. The internal sugar residues in a DNA strand normally have free hydroxyl groups, unlike those in an RNA strand.

  3. Bases are covalently linked to the carbon 1’ atoms of the sugars.

  4. Neighboring sugar residues are linked to each other by a phosphodiester bond that connects the 3’ carbon atom on one sugar to the 5’ carbon atom of its neighbour.

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TLS Online TPP Program

#Question id: 10963

#I Life Science/ Life Sciences Group – I-V

During an inflammatory response, which is the correct order for cellular events?

TLS Online TPP Program

#Question id: 10964

#I Life Science/ Life Sciences Group – I-V

A patient visits his dentist, who notices a sore on the patient’s lip. The sore was unusual in that there was no pain or drainage from the sore. The patient was subsequently admitted to the hospital with a violent shaking chill. His lab values were Hct 30%, platelets 400,000/μl, WBC 4200/μl, 68% lymphocytes, and 20% neutrophils. What is the diagnosis of this patient?

TLS Online TPP Program

#Question id: 10965

#I Life Science/ Life Sciences Group – I-V

Which of the following is a TRUE statement?

TLS Online TPP Program

#Question id: 10966

#I Life Science/ Life Sciences Group – I-V

A couple requests blood typing of their 2-year-old child (father AB, Rh-negative; mother B, Rhnegative). Results of hemagglutination assays of the child’s blood are shown in the next figure. Which of the following conclusions concerning the child’s parentage is valid?


TLS Online TPP Program

#Question id: 10967

#I Life Science/ Life Sciences Group – I-V

A 21-year-old female, blood type B, is undergoing surgery. Her platelet count is 75,000/μl. She will need platelet infusions before and during surgery. Which of the following blood types would be used to collect platelets that are compatible with the patient?

TLS Online TPP Program

#Question id: 10968

#I Life Science/ Life Sciences Group – I-V

Which of the following is TRUE concerning erythroblastosis fetalis (hemolytic disease of the newborn, HDN)?