#Question id: 561
#SCPH05 I Biotechnology
Enzyme X exhibits maximum activity at pH = 6.9. X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4. One likely interpretation of this pH activity is that:
#Question id: 3030
#I Life Science/ Life Sciences Group – I-V
Which of the following features of prokaryotic biology involves metabolic cooperation among cells?
#Question id: 4955
#SCPH28 | Zoology
If relatively small carbonaceous chondrites from space were a significant source of Earthʹs original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth?
I. Carbonaceous chondrites must contain no D-amino acids.
II. Earthʹs early atmosphere must have had little free oxygen.
III. The chondrites must have arrived on Earth before 4.2 billion years ago.
IV. Earthʹs early atmosphere must have been dense enough to dramatically slow the chondrites before they impacted.
V. The chondrites must have impacted land, rather than a large body of water.
#Question id: 3679
#SCPH05 I Biotechnology
A mutation in an E. coli cell becomes active half-way through a round of replication. The cell completes the round of replication normally but then cannot start a second round. Which protein could be mutated?
#Question id: 14347
#SCPH05 I Biotechnology
The K used in the equation for X10=2.303/K depends upon