1. -NITRATE ASSIMILATION-
BIOCHEMISTRY QUIZ
-NITRATE ASSIMILATION-

2. 1
The reservoir for nitrogen is ... a. the atmosphere. b. rocks. c. ammonia. d. nitrates. e. amino acids.

3. 2
Higher plants most often absorb nitrogen from the soil in the form of ... a. N2. b. nitrites. c. ammonia. d. nitrates. e. amino acids.

4. 3 NO3- + NADH  NO2- + NAD+ This is the reaction of ... Nitrification
Denitrification
Nitrogen fixation
Nitrate reduction
Nitrite reduction

5. 4 NO3- + NADH  NO2- + NAD+ The reaction is catalyzed by ...
Glutamate dehydrogenase / GDH
Glutamate synthase / GOGAT
Glutamin synthetase / GS
Nitrate reductase
Nitrite reductase

6. 5 NO3- + NADH  NO2- + NAD+ The reaction takes place in the ...
Vakuola
Chloroplast
Leucoplast
Cytosol
I dont know

7. 6 NO2- + reduced ferredoxin  NH4 + oxidized ferredoxin
The reaction is catalyzed by ...
Glutamate dehydrogenase / GDH
Glutamate synthase / GOGAT
Glutamin synthetase / GS
Nitrate reductase
Nitrite reductase

8. 7 The reaction takes place in the ... Vakuola Chloroplast Leucoplast
NO2- + reduced ferredoxin  NH4 + oxidized ferredoxin
The reaction takes place in the ...
Vakuola
Chloroplast
Leucoplast
Cytosol
I dont know

9. 8 NH4 + glutamate + ATP  glutamine + ADP + Pi
The reaction is catalyzed by ...
Glutamate dehydrogenase / GDH
Glutamate synthase / GOGAT
Glutamin synthetase / GS
Nitrate reductase
Nitrite reductase

10. 9
Which of the following amino acids is the smallest of all amino acids?
Alanine
Serine
Valine
Glycine
I dont know

11. 10
Which of the following amino acids can form a special covalent bond called a disulfide bond?
Tyrosine
Methionine
Cysteine
Lysine
I dont know

12. THE END

13. KUNCI JAWABAN
1. A 2. D 3. D 4. D 5. D 6. E 7. B 8. C 9. D 10. C