#Question id: 10348
#Unit 6. System Physiology – Plant
During ammonium assimilation, requires two enzymes converting ammonium to amino acids. Each of which is Glutamine synthetase (GS), given below some statements about GS ;
a) GS transfers the amide group of glutamine to 2-oxoglutarate, yielding two molecules of glutamate
b) it requires a divalent cation such as Mg2+, Mn2+, or Co2+ as a cofactor
c) Plants contain two classes of GS, one in the cytosol and the other in root plastids or shoot chloroplasts
d) The cytosolic forms are expressed in germinating seeds or in the vascular bundles of roots and shoots and produce glutamate for intercellular nitrogen transport
e) The GS in root plastids generates amide nitrogen for local consumption; the GS in shoot chloroplasts reassimilates photorespiratory NH4+
f) Light and carbohydrate levels alter the expression of the cytosolic forms of the enzyme, but they have little effect on the plastid forms.
Which of the following statements is correct?
#Question id: 18862
#Unit 13. Methods in Biology
#Question id: 23703
#Unit 13. Methods in Biology
#Question id: 7014
#Unit 5. Developmental Biology
Microglia are often considered the “immune cells” of the central nervous system, since they function:
#Question id: 7262
#Unit 5. Developmental Biology
Match
the following Gene (column I) with their function (column II).
Column I |
Column II |
A.
sex-lethal |
i.
facilitates transcription from the X chromosome |
B.
double-sex |
ii.
help to generate the female phenotype
by splicing the doublesex gene |
C.
msl |
iii.
encodes an RNA splicing factor |
D.
transformer |
iv.
activate wingless gene in female |
Which
of the following is correct?