#Question id: 14803
#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
#Question id: 2437
#Section 3: Genetics, Cellular and Molecular Biology
Membrane extension involves
a. bending actin filaments.
b. myosin II.
c. the Arp2/3 nucleation of new filaments.
d. actin depolymerization.
e. actin polymerization.
#Question id: 132
#Section 2: General Biology
Proline is distinct among the 20 commonly found amino acids because
#Question id: 3584
#Section 2: General Biology
In a plant species, a segregating line (RR- Red, Rr- Pink and rr- white) that contains both homozygotes and heterozygotes at a locus can be made homozygous by repeated selfing for several generations. What is the proportional red flower in third generations of selfing, if the level of heterozygosity in generation '0' is denoted as 1?
#Question id: 14275
#Section 5: Bioprocess Engineering and Process Biotechnology
Nicotiana tabacum cells are cultured
to high density for production of polysaccharide gum. The reactor used is a
stirred tank, containing initially 100 litres medium. The maximum specific
growth rate of the culture is 0.18 d-1 and the yield of biomass from
substrate is 0.5 g g-l. The concentration of growth-limiting
substrate in the medium is 3% (w/v). The reactor is inoculated with 1.5 g l-
1 cells and operated in batch until the substrate is virtually exhausted;
medium flow is then started at a rate of 4 l d-1. Fed-batch
operation occurs under quasi-steady-state conditions. Fed-batch operation
is carried out for 40 d. What is the final mass of cells in the reactor?
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