molecular biology

Question 1

improper charged trna

Answer 1

incorrect aminoacid incoporated,highly specific amino acid proof reading activity

Question 2

what is ricin

Answer 2

Ricin (from the castor oil plant Ricinus communis) is a potent toxin that inhibits protein synthesis by cleaving the rRNA component of the eukaryotic 60S subunit.

Question 3

choroid plexus what is it made up off

Answer 3

The choroid plexus is composed of ependymal cell-covered outgrowths of pia mater capillaries that are fenestrated unlike other central nervous system (CNS) capillarie

Question 4

what is pecam1

Answer 4

Commonly used as an immunohistochemical marker of hepatic angiosarcom

Question 5

explain bloof brain barrier and how dopamine passes through

Answer 5

surrounded by tight junctions,typically occludins and claudins( actin filaments)so we have transcellular spaces which is impossible for dopamine, ldopa enters via neutral amino transporter

Question 6

which organs have fenestrae

Answer 6

kidney intestine and endocrine glands

Question 7

classigy the MEN syndromes what is always present

Answer 7

thyroid cancer very agressive early compared to sporadic

Question 8

sinus brady cardia in myocardial infarction

Answer 8

t occurs due to both nodal ischemia and enhanced vagal tone tr

Question 9

what is excertional dyspnea

Answer 9

exertional dyspnea as the first symptom, which results from an inability to increase cardiac output