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Q 1/25
Score 0
Which of the following best defines "cell disruption" in downstream processing?
30
D. Filtering cell culture broth to remove large particles
B. Breaking open cells to release intracellular products
C. Sterilizing culture media before inoculation
A. Growing cells in a bioreactor to high density
Q 2/25
Score 0
Which factor most directly influences the choice of cell disruption method for a given process?
30
C. The time of day the harvest occurs
B. The location and sensitivity of the target product (intracellular vs. extracellular)
D. The brand of incubator used
A. The color of the culture medium
25 questions
Q.
Which of the following best defines "cell disruption" in downstream processing?
1
30 sec
Q.
Which factor most directly influences the choice of cell disruption method for a given process?
2
30 sec
Q.
Enzymatic cell lysis is often chosen because it:
3
30 sec
Q.
Which enzyme is commonly used to weaken bacterial cell walls for lysis?
4
30 sec
Q.
A major drawback of enzymatic lysis at industrial scale is:
5
30 sec
Q.
Which physical disruption method uses high shear and impact to break cells?
6
30 sec
Q.
Sonication primarily disrupts cells by:
7
30 sec
Q.
When selecting a bead mill for yeast cell disruption, which parameter is least relevant?
8
30 sec
Q.
Which of the following is a chemical method for cell disruption?
9
30 sec
Q.
Detergents disrupt cell membranes primarily by:
10
30 sec
Q.
High-pressure homogenization breaks cells by:
11
30 sec
Q.
Which cell type is generally easiest to lyse using mild enzymatic or chemical methods?
12
30 sec
Q.
For sensitive recombinant proteins prone to denaturation, the preferred disruption approach is usually:
13
30 sec
Q.
A key advantage of physical methods (e.g., high-pressure homogenization) over enzymatic methods is:
14
30 sec
Q.
Which downstream concern is particularly important after chemical lysis with detergents?
15
30 sec
Q.
Osmotic shock is most effective for disrupting which cell type?
16
30 sec
Q.
Freeze–thaw cycles disrupt cells by:
17
30 sec
Q.
Which metric is critical to report when evaluating lysis efficiency?
18
30 sec
Q.
When scaling up a lab-scale sonication protocol to pilot scale, the main challenge is:
19
30 sec
Q.
Which combination strategy is often used to improve overall disruption while protecting product quality?
20
30 sec
Q.
Which analytical method is commonly used to assess cell breakage visually and quantitatively?
21
30 sec
Q.
Proteolytic degradation of target proteins during disruption is a common problem. The best preventive step is:
22
30 sec
Q.
Endotoxin release during bacterial cell disruption is a safety and purification concern because:
23
30 sec
Q.
Which statement about energy efficiency and cost is generally true?
24
30 sec
Q.
A process development scientist needs to compare three disruption methods. Which experimental design element is most important to ensure a fair comparison?