#Question id: 15871
#SCPH05 I Biotechnology
Various sterilization techniques used in plant tissue culture work;
|
Sterilization technique |
Materials sterilized |
|
A) Dry heat |
i) Media, culture vessels, other glass plasticwarc, contaminated
cultures |
|
B) Autoclaving |
ii)
Heat labile compounds like GA3, ABA, zeatin, urea,·enzymes, etc. |
|
C) Surface sterilization |
iii) Empty glassware, instruments like scalpels, forceps,
needles |
|
D) Liquid (membrane filter of 0.45 μm or smaller pore size) |
iv)
All plant materials to be cultured |
#Question id: 15268
#SCPH01 Biochemistry
#Question id: 5755
#SCPH06 I Botany
A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell. She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU). However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably
#Question id: 383
#SCPH05 I Biotechnology
Three buffers are made by combining a 1 M solution of acetic acid with a 1 M solution of sodium acetate in the ratios shown below
|
1 M acetic acid |
1 M sodium acetate |
|
Buffer 1: 10 mL |
90 mL |
|
Buffer 2: 50 mL |
50 mL |
|
Buffer 3: 90 mL |
10 mL |
Which of these statements is true of the resulting buffers?
#Question id: 11125
#I Life Science/ Life Sciences Group – I-V
In chemical synapses that involve a so-called second messenger, typically a G-protein linked to the postsynaptic receptor is activated when neurotransmitter binds to that receptor. Which of the following represents an activity performed by the activated second messenger?