Mixed 16

Question 1

Envelope glycoproteins which mediate HIV fusion with the host cell

Answer 1

gp120 → attachment to host CD4 T cell

gp41 → fusion and entry

Question 2

Prenatal screening for neural tube defects

Answer 2

Alfa-fetoprotein (amniotic fluid and maternal serum)

Acetilcholinesterase (only amniotic fluid)

Question 3

Pigment that causes the greenish color to develop in bruises several days after an injury

Answer 3

Biliverdin (by Heme oxygenase)

Question 4

Hormone responsible of lactation supression in pregnancy although high levels of prolactin

Answer 4

Progesterone