Selenium

Question 1

what are the 4 structures of selenium

Answer 1

1. selenomethionine
2. selenocyteine
3. selenite
4. selenate

Question 2

best source of selenium

Answer 2

seafood

Question 3

T/F cancer rates are higher in people who live in areas that have low soil selenium concentrations

Answer 3

T

Question 4

what enhances the absorption of selenium

Answer 4

vitamin A,C,E

glutathione

Question 5

what carries 60% of selenium in plasma as selenocysteine

Answer 5

selenoprotein P

Question 6

what can be used as an indicator of selenium def.

Answer 6

selenoprotein P

Question 7

selenide can be methylated and excreted in urine as

Answer 7

methyl selenide

Question 8

selenocysteine synthesized by 2 enzymes

Answer 8

1. selenophophate synthetase

2. slenocysteine synthase

Question 9

selenium is incorporated into selenoproteins as _____ via

Answer 9

selenocysteine via selenocysteine tRNA

Question 10

what two proteins does selenocysteine tRNA require

Answer 10

1. SBP2

2. EFsec

Question 11

___ and __ account for 90% of selenium in the plasma

Answer 11

GPX3 and selenoprotein P

Question 12

thioredoxin reductase is used in synthesis of _____ for DNA synthesis

Answer 12

deoxyribonucleotides

Question 13

_____ is found in cytosol for cardiac and skeletal muscle

Answer 13

selenoprotein W

Question 14

_____ observed in miners and people who consume selenium from supplements

Answer 14

selenosis

Question 15

UI is

Answer 15

400 micrograms/day