When bacteria produce mammalian proteins, cDNA is used rather than genomic DNA. Which of the following is the best explanation?
Anonymous Poll
31%
It is easier to clone cDNA than genomic DNA of comparable size.
14%
It is easier to clone RNA than DNA
17%
It is not possible to clone the entire coding region of the gene.
39%
Most eukaryotic genes have introns that cannot be removed in bacteria
A mutation deleting an upstream activating sequence for a single gene would be expected to be
Anonymous Poll
18%
polar
38%
trans-dominant
41%
cis-dominant
3%
cis-dominant
👍1
Particular RNAs that are important for development are located in distinct regions of the Drosophila embryo.
This is most directly demonstrated by using
This is most directly demonstrated by using
Anonymous Poll
17%
western blotting
54%
Northern blotting
25%
in situ hybridization
4%
in vitro translation
👍1
The Staphylococcus aureus MRSA strain is named because it is
Anonymous Poll
51%
multiple drug resistant strain
28%
methicillin resistant
10%
resistant to mupirocin
11%
resistant to all antibiotics
Which of the following statements about mast cells is incorrect?
Anonymous Poll
23%
mast cells are derived from myeloid progenitors
28%
they secrete cytokine IL-2
32%
they have FcɛRI on their membrane
17%
upon activation they secrete mediators of inflammation
The three molecules involved in antigen presentation to CD4 T- cells are
Anonymous Poll
12%
TAP, MHC Iα chains
52%
MHC Iα chains, lysosomal enzymes and invariant chain
36%
TAP, MHC Iα chains and β2 microglobulin
Discoidal cleavage is the characteristic of
Anonymous Poll
48%
bird
19%
insects
16%
mammals
17%
amphibians
In developing brain, notch signalling
Anonymous Poll
26%
inhibits stem cell to neural progenitor cell formation
46%
promotes astrocyte formation and inhibits neuron formation
6%
inhibits astrocyte formation
22%
promotes neuron formation
In a group of siblings there are seven sisters, and each sister has one brother. How many siblings are there in total?
Anonymous Poll
5%
15
31%
14
53%
8
11%
7
4. A bread contains 40% (by volume) edible matter and the remaining space is filled with air. If the density of edible matter is 2 g/cc, what will be the bulk density of the bread (in g/cc)?
Anonymous Poll
11%
0.4
60%
0.8
23%
1.2
6%
1.6
👍1