Which of the following bacteria lack a cell wall?

#Question id: 2452

#Section 3: Genetics, Cellular and Molecular Biology

Intermediate filaments

a. are typically 6 nm in diameter.                  

b. are essential for cell motility.

c. may be used to diagnose the tissue of origin for many cancers.

d. are composed of globular subunits.                       

e. are formed from tetrameric subunits.

#Question id: 27432

#Section 5: Bioprocess Engineering and Process Biotechnology

Damkolher number (Noa) is the ratio of

#Question id: 14196

#Section 5: Bioprocess Engineering and Process Biotechnology

A fluidized-bed, immobilized-cell bioreactor is used for the conversion of glucose to ethanol by Z. mobilis cells immobilized in k-carrageenan gel beads. The dimensions of the bed are 10 cm (diameter) by 200 cm. Since the reactor is fed from the bottom of the column and because of CO₂ gas evolution, substrate and cell concentrations decrease with the height of the column. The average cell concentration at the bottom of the column is X₀ = 45 g/l, and the average cell concentration decreases with the column height according to the following equation:

where Z is the column height (cm). The specific rate of substrate consumption is q_S = 2 g S/g cells. h. The feed flow rate and glucose concentration in the feed are 5 l/h and 160 g glucose/l, respectively.

Determine the substrate (glucose) concentration in the effluent

#Question id: 2938

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following inhibit(s) cyclin A/Cdk2 activity?

#Question id: 3525

#Section 3: Genetics, Cellular and Molecular Biology

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype was crossed with rrtt plant results progeny, are