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#Question id: 15656
#SCPH01 Biochemistry
You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. Explain the two regulatory pathways for Mel1 that can explain the behavior of the MelA– and MelB– mutations. For each regulatory pathways what is a role for the inducer melibiose?
TLS Online TPP Program
#Question id: 2957
#I Life Science/ Life Sciences Group – I-V
A mutation in the gene that codes for p53 can result in-
A. loss of an inhibitor protein, p21.
B. loss of a transcription factor.
C. uncontrolled cell growth and cancer.
Which of the following is correct?
TLS Online TPP Program
#Question id: 2996
#SCPH05 I Biotechnology
Cell death approximately equal to cell division is found in
TLS Online TPP Program
#Question id: 10988
#I Life Science/ Life Sciences Group – I-V
What is the normal total delay of the cardiac impulse in the A-V node and the A-V bundle system?
TLS Online TPP Program
#Question id: 11004
#I Life Science/ Life Sciences Group – I-V
Which of the following is most likely to cause the heart to go into spastic contraction?