Given the following equation (2A+B  3C). Which of the following correctly displays the rate of the reaction?

I. -Δ[A]/2Δt

II. Δ[B]/Δt

III. Δ[C]/3Δt

#Question id: 1983

#Section 2: General Biology

These cells are involved in innate immunity, and a person lacking these cells may have a higher than normal chance of developing malignant tumors:

#Question id: 1984

#Section 2: General Biology

Which of the following is a pathway that would lead to the activation of cytotoxic T cells?

#Question id: 1985

#Section 2: General Biology

Which of the following is the last line of defense against an extracellular pathogen?

#Question id: 1986

#Section 2: General Biology

The following events occur when a mammalian immune system first encounters a pathogen. Which shows the correct sequence in which they occur?

I.   Pathogen is destroyed.

II.  Lymphocytes secrete antibodies.

III. Antigenic determinants from pathogen bind to antigen receptors on lymphocytes.

 IV.  Lymphocytes specific to antigenic determinants from pathogen become numerous.

V.   Only memory cells remain.

#Question id: 1987

#Section 2: General Biology

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to

#Question id: 1987

#Section 2: General Biology

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to