Which of the following is NOT a common intracellular second messenger?

#Question id: 14166

#Section 4: Fundamentals of Biological Engineering

Stoichiometric equations are used to represent growth of microorganisms provided a ' molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C4.4H7.30 1.2N0.86 . These bacteria are grown under aerobic conditions with hexadecane (C16H34) as substrate. The reaction equation describing growth is:

You have been put in charge of a small fermenter for growing the bacteria and aim to produce 2.5 kg of cells for inoculation of a pilot-scale reactor. What minimum amount of hexadecane substrate must be contained in your culture medium? 

#Question id: 1697

#Section 2: General Biology

Cross-presentation of exogenous antigen to αβ T-cells does NOT require the involvement of:

#Question id: 1956

#Section 2: General Biology

Which of the following is the autoimmune condition with the single most profound genetic association?

#Question id: 4306

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following molecules helps to "turn off" genes in a cell?

#Question id: 14470

#Section 1: Engineering Mathematics

A spherical snowball is melting at rate of cubic centimeter per hour. How fast is the diameter changing when it is 20 centimeters ?