Biochemical Engineering

Question 1

The occurrence of cell growth begins with adding a small quantity of living cells to a liquid solution of essential nutrients at a suitable __ and __.

Answer 1

pH, temperature

Question 2

There are two interacting systems involved – the biological phase consisting of a ___________ and the environmental phase or the _________.

Answer 2

cell population, growth medium

Question 3

The medium often consists of liquid with dispersed gas bubbles, a liquid-liquid system comprised of immiscible liquid phases, or sometimes a three-phase system with two liquids and one gas phase.

Answer 3

Multiphase

Question 3

Thermal interaction occurs where cells generate ____, while the medium set the _____ of the cells.

Answer 3

heat, temperature

Question 4

Commonly, conditions within the biological reactor differ from point to point in space because of the scale of the tank and the high viscosity and non-Newtonian nature of broth in some situations.

Answer 4

Spatial uniformity

Question 5

On the single-cell level, different cells in the population at a given point in time and
a given small region in space vary with respect to age and chemical activity. Cells of different ages are often characterized by different types of metabolic functions and activities.

Answer 5

Cell-to-cell heterogeneity

Question 6

1. Multicomponent cellular representations
2. Single component cellular representations
3. A perspective constituting of heterogeneous cells
4. A perspective considering average cellular properties

Answer 6

1. Structured
2. Unstructured
3. Segregated
4. Unsegregated

Question 7

Bioreactors which use enzymes to perform biological reactions inside the vessel

Answer 7

Enzyme reactors