Neurofibromatosis, a benign tumor of the sheath cells that surround nerves, is caused by loss of both alleles of NF1, which encodes a RAS GAP-type protein.

TLS Online TPP Program

#Id: 2728

#Unit 12. Applied Biology

Which one of the following can be used as a selection marker for developing transgenic plants?

green fluorescent protein

β-glucuronidase

β-galactosidase

hygromycin phosphotransferase

 

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#Id: 4495

#Unit 13. Methods in Biology

Electrical connections between the patient’s limbs and the electrocardiograph for recording ECGs from the standard bipolar limb leads.

TLS Online TPP Program

#Id: 5827

#Unit 7. System Physiology – Animal

Cushing syndrome Chronic excess of glucocorticoids (hypersecretion of ACTH from a pituitary adenoma)

TLS Online TPP Program

#Id: 10382

#Unit 4. Cell Communication and Cell Signaling

Expression of class II molecules by B cells is down-regulated by IFN-¥.

TLS Online TPP Program

#Id: 8821

#Unit 6. System Physiology – Plant