Questions
Which among the following is a Myeloid lineage defect?
- Brutons Disease
- Leukocyte Adhesion deficency
- Di George Syndrome
- Severe combined immunodeficency
- Agammaglobulinemia
A radioactivity of a sample is 211326dpm. What reading can be expected from a 97% scintillator?
- 2178.66
- 204986.22
- 211326
- 12299173
- 4.5900
If a radioactive sample shows a value of 134503 count per minute (cpm), and the efficency is 98.8, what will be the actual radioactivity of the sample?
- 136136.6 disintegration per minute (dpm)
- 134503 disintegration per minute (dpm)
- 1361.366 disintegration per second (dps)
- 1361.366 count per minute (cpm)
- Value cannot be determined
Which among the following molecule is not involved in cell-cell adhesion?
- Integrins
- Selectin
- Calmodulin
- Cadherins
- None of the above
If a radioactive sample shows 184965 count per minute (cpm), and the efficency of the scintillator is 95.7%, what is the actual radioactivity in curie?
- 870.611 x 10-10 ci
- 193275 ci
- 32221 ci
- 17701150 ci
- 184965 ci
Protein kinase C is activated by
- Calcium ions
- Diacylglycerol
- Phorbol esters
- All of the above
- None of the above
If Kcat of an enzyme is 30 sec-1, the Michalis Menton constant is 5 x 10-3 and the total enzyme concentration is 15μg, what is the maximum velocity of the reaction?
- 45 mg/min
- 2 x 103 mg/min
- 4.5 mg/min
- 0.5 mg/min
- 30 mg/min
Which of the following sentences is/are true about Inositol triphosphate?
- It can rapidly diffuse through cytoplasm
- Induces rapid release of calcium ions from the intracellular stores
- It activates protein kinase C
- Involved in the production of arachidonic acid
- Both 1 & 2
Which of the following is a drosophilla homeotic gene that comes under antennapedia complex?
- Ultrabithorax
- Abdominal A
- Labial
- Hunch back
- Abdominal B
Which of the following sentence is not true about Phorbol esters?
- Phorbol esters activate tumor formation
- Phorbol esters persist in cells for a long time
- Presence of phorbol esters leads to activation of protein kinase C at physiological calcium ion concentration
- Phorbol esters are structurally similar to Diacylglycerol
- Phorbol esters induce apoptosis
In drosophila development, the two maternal genes, bicoid and nanos, regulate the expression of a gap gene called 'hunch back'. Which among the following statement(s) is/are not true about these two genes?
- Bicoid and nanos have opposite effects on a gene called hunch back.
- Bicoid is a transcription factor that activates hunch back.
- Nanos inhibits the translation hunch back mRNA's.
- Bicoid is a transcription factor that inhibits hunch back.
- The combined effect of biocoid and nanos results in production of high levelsof hunch back protein at the anterior of the embryo and low levels towards the posterior end.
Drosophilla's head and anterior thorax are determined by ________ .
- bithorax complex genes
- bicoid
- antennapedia complex
- nanos
- gap genes
In polyacrylamide gel electrophoresis, _________ acts as an additional catalyst for polymerisation.
- acrylamide
- N, N'-Methylene-bis acrylamide
- N, N, N, N- tetramethylenediamine (TEMED)
- agarose
- none of the above
Gene/s that specifically guide pollen tube to ovule is/are
- POP2
- POP3
- AGAMOUS
- Both 1 and 2
- Both 1 and 3
Peptides joined together by disulphide band can be detected by _______ electrophoresis.
- agarose gel
- native polyacrylamide gel
- diagonal electrophoresis
- isotachphoresis
- none of the above