In the first-order decomposition of dinitrogen pentoxide at 335 K,

N2O5(g) → 2 NO2(g) + ½ O2(g)

if we start with a 2.50-g sample of N2O5 at 335 K and have 1.50 g remaining after 109 s, 

(a) What is the value of the rate constant k? 

(b) What is the half-life of the reaction? 

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#Question id: 1900

#Section 2: General Biology

Which of the following statements is TRUE of the human major histocompatibility complex (MHC)?

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#Question id: 1901

#Section 2: General Biology

Mitosis occurs when mixing lymphocytes of two individuals:

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#Question id: 1902

#Section 2: General Biology

Graft vs host disease occurs on injecting adult T-cells of strain A into:

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#Question id: 1903

#Section 2: General Biology

Non-specific suppression of graft rejection can be achieved with

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#Question id: 1904

#Section 2: General Biology

What is the target of the monoclonal antibody basiliximab used to help suppress allograft rejection?

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#Question id: 1905

#Section 2: General Biology

What is the approximate 1-year survival rate for cadaver kidneys grafted into individuals with no DR mismatches?